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All online calculators

567 free calculators in 30 categories — no registration, with current rates for Poland. Pick a category from the list below or scroll to browse every tool grouped by topic.

Salary and payroll calculators

23 calculators

Calculate net take-home pay for every type of contract and the full cost of employment. The calculators below convert gross to net for an employment contract, mandate contract, specific-task contract and B2B, factoring in ZUS contributions, the health contribution and the PIT advance under current rules. Employees can quickly check their real pay, while employers can estimate hiring costs. Results are indicative and are not tax advice — pick the calculator that matches your situation.

  • Seniority Bonus Calculator 2026

    Calculate the seniority bonus: 5% after 5 years, +1% yearly, max 20%. Check the percentage and amount of the long-service bonus. Free calculator.

  • Night Shift Premium Calculator 2026

    Calculate the night-work premium: 20% of the hourly rate from the minimum wage. Check the per-hour premium and total amount. Free calculator.

  • Employer Cost Calculator

    Calculate the total cost of hiring an employee in Poland. Includes employer ZUS contributions: pension, disability, accident insurance, Labour Fund, and FGÅšP.

  • Hourly Wage Calculator

    Convert an hourly rate to a monthly salary or vice versa. Check if your hourly rate meets the Polish minimum wage of PLN 30.50/h (2025).

  • Overtime Pay Calculator 2026

    Calculate overtime pay with 50% (regular overtime) or 100% (night, Sunday, holidays) supplements. Enter base salary, hours and working time — instant results. Free.

  • Prorated Salary Calculator

    Calculate prorated gross salary for a partial work month in Poland. Enter full salary, working days in the month and days worked — instant result.

  • Poland Minimum Wage Calculator 2026

    Check Poland's minimum wage for 2026: PLN 4626 gross/month and PLN 30.20/hour. Calculate net take-home pay and the hourly rate instantly, free.

  • Polish Vacation Pay Calculator

    Calculate your Polish vacation pay (wynagrodzenie urlopowe) instantly. Enter your monthly gross salary and number of leave days to see the result.

  • On-call allowance calculator

    Calculate the on-call (standby) allowance: enter base salary, on-call hours and the percentage rate to get the supplement and total monthly gross pay. Free.

  • Poland Minimum Wage 2026 Calculator

    Calculate Poland minimum wage 2026: 4666 PLN gross (employment) or 30.50 PLN/h (contract). See take-home net pay instantly. Free, no signup.

  • Jubilee Bonus Calculator

    Calculate your Polish jubilee bonus (nagroda jubileuszowa) gross and net. Thresholds: 20, 25, 30, 35, 40 years of service. Rates from 75% to 300% of monthly salary.

  • Vacation Pay Coefficient Calculator

    Calculate the Polish vacation pay coefficient for any year and find your daily vacation pay rate. Based on the statutory formula. Free online calculator for employees and HR.

  • Work Clothing Allowance Calculator 2026

    Calculate the allowance for using your own work clothing or personal protective equipment. Find out how much you are entitled to for laundering and wear of work clothing.

  • Discretionary Bonus Calculator

    Calculate your discretionary bonus net amount after ZUS contributions and PIT income tax. Works for employment contract and B2B.

  • Coal Allowance Calculator

    Calculate the monetary value of your coal allowance and the tax-exempt limit. Calculator for miners and energy sector workers in Poland.

  • Duty Pay Calculator

    Calculate your duty pay under Polish Labour Code art. 151⁵. On-site and on-call duty — quick online calculator.

See the whole Salary and payroll calculators category →

Savings and deposit calculators

6 calculators

See how much you will really earn on your savings and how your capital grows thanks to compound interest. The calculators below work out interest on a term deposit and savings account, the return on treasury bonds, the snowball effect of regular saving, and how much to set aside each month for a specific goal. You can net any result of the Belka capital-gains tax to see the take-home figure. These tools are for savers and beginner investors — pick the one that fits your plan. Results are indicative and are not investment advice.

See the whole Savings and deposit calculators category →

VAT calculators

8 calculators

Convert net and gross prices at different VAT rates. Pick a calculator below.

  • VAT Margin Scheme Calculator 2026

    Calculate VAT on the margin under the margin scheme: used cars, antiques, tourism. Enter sale and purchase price, pick the 23% or 8% rate. Free tool.

  • VAT Invoice Calculator

    Calculate net value, VAT amount and gross total for up to 5 invoice line items. Supports VAT rates 23%, 8%, 5% and 0%. Free online invoice calculator.

  • Reverse VAT Calculator

    Calculate the net amount and VAT from a gross price, or add VAT to a net price. Reverse VAT calculator for 23%, 8%, 5% and 0% rates — free online tool.

  • Advance Invoice Calculator

    The advance invoice calculator quickly computes the net amount, VAT, and gross amount based on the entered gross value and selected VAT rate (23%, 8%, 5%, 0%).

See the whole VAT calculators category →

Math calculators

28 calculators

Quick percentage and arithmetic calculations. Pick a calculator below.

  • Percentage calculator

    Calculate the percentage of a number, a percentage increase and a percentage decrease. Free percentage calculator.

  • Fraction Calculator

    Calculate addition, subtraction, multiplication and division of fractions online. Result as simplified fraction and decimal. Free.

  • Average Calculator

    Calculate arithmetic mean, median, minimum and maximum from numbers. Free online average calculator.

  • GCD and LCM Calculator

    Calculate GCD (greatest common divisor) and LCM (least common multiple) of two numbers. Free online calculator.

  • Area of Geometric Shapes Calculator

    Calculate the area and perimeter of geometric shapes online: square, rectangle, triangle, circle, trapezoid, rhombus, regular hexagon and ellipse.

  • Roots and powers calculator

    Calculate square root, cube root, nth root or any power of a number. Free math calculator — no signup required, instant results.

  • Rounding calculator

    Round any number to 1, 2 or 3 decimal places, to the nearest whole, ten, hundred or thousand. Free online rounding calculator with rounding error.

  • Number base converter

    Convert numbers between binary, octal, decimal and hexadecimal. Free online number base calculator — instant conversion, no signup required.

  • Triangle Calculator

    Calculate triangle area, perimeter and angles using Heron's formula. Enter three sides or two sides and an angle — free geometry calculator online.

  • Compound Interest Calculator

    Calculate final capital with compound interest. Enter annual rate, term and compounding frequency — free investment calculator with PLN result online.

  • Percentage Calculator

    Calculate what percent A is of B, find X% of a number, percentage change or add a percent to a value. Fast percentage calculator online, free.

  • Prime Number Calculator

    Check if a number is prime, find the next prime number, or factorize a number into prime factors. Instant result online, no registration needed.

  • Linear Equation Calculator

    Solve linear equations of the form ax + b = c online. Enter coefficients a, b and c to instantly find x with step-by-step verification.

  • Trigonometry Calculator

    Online trigonometry calculator — compute sin, cos, tan, arcsin, arccos, arctan for any angle in degrees or radians. Fast, accurate, free.

  • Geometric Sequence Calculator

    Calculate the nth term, partial sum, and infinite sum of a geometric sequence online. Fast calculator with formulas and examples for students and teachers.

  • 2x2 Matrix Calculator

    Calculate the result of 2x2 matrix operations: addition, subtraction and multiplication. Also check the determinants of both matrices.

  • Logarithm Calculator

    Calculate the logarithm of any number with a custom base, natural logarithm (ln) and common logarithm (log10). Fast online logarithm calculator.

  • Volume of Geometric Solids Calculator

    Calculate the volume of geometric solids online: cube, cuboid, sphere, cylinder, cone, square pyramid and triangular prism. Instant results with formulas and examples.

  • Combinatorics Calculator

    Calculate permutations P(n), combinations C(n,k), arrangements V(n,k) and their with-repetition variants. Formulas and examples. Free online combinatorics calculator.

  • Polynomial Derivative Calculator

    Calculate the derivative of a polynomial up to degree 4 using the power rule. Enter coefficients, optionally provide x, and get the derivative formula and numeric value.

  • Triangle Area Calculator

    Calculate the area of a triangle from the formula half times base times height. Enter base and height — instant result. Heron formula for three sides.

  • Cylinder Volume Calculator

    Compute cylinder volume with V = pi*r^2*h. Enter radius and height to get volume in cm3 and litres plus total surface area.

See the whole Math calculators category →

Loan calculators

19 calculators

A mortgage or personal loan is a multi-year commitment, so before signing it is worth comparing annuity and decreasing payment schedules, benchmarking offers by APR, and assessing your creditworthiness. The variable WIBOR rate affects your monthly instalment — factor this into your budget. Loan overpayment is one of the most effective ways to cut total interest costs. Pick a calculator below.

  • Credit Card Payoff Calculator 2026

    Calculate how many months it takes to pay off a credit card and how much interest you pay. Enter balance, interest rate and monthly payment. Free.

  • Mortgage calculator

    Calculate your monthly mortgage payment: instalment, total interest and total cost. Free mortgage calculator 2026.

  • Creditworthiness calculator

    Check your approximate creditworthiness: maximum instalment and loan amount based on your income. Free credit capacity simulator.

  • APR (RRSO) calculator

    Calculate APR (Annual Percentage Rate) for a loan: includes commission and insurance. Compare offers. Free APR calculator.

  • Cash Loan Calculator 2026

    Calculate your monthly instalment, total interest and full cost of a cash loan. Annuity formula, one-off fee included. Free, instant, no signup required.

  • Car Loan Calculator 2026

    Calculate your monthly car loan instalment, total interest and full financing cost. Annuity formula — free, instant, no signup.

  • Debt Consolidation Calculator 2026

    Calculate your new monthly payment after debt consolidation, total interest and monthly savings. Annuity formula — free, instant, no signup.

  • Leasing Calculator 2026

    Calculate your monthly lease payment, total cost and initial deposit for operating or finance leases. Annuity formula — free, instant, no signup.

  • Loan Interest Calculator 2026

    Calculate total loan interest using the simple interest method: principal × rate% / 12 × months. Free, instant, no signup.

  • Loan repayment schedule calculator

    Calculate your loan repayment schedule: first and last instalment, total interest and overall cost. Choose equal (annuity) or decreasing instalments. Free, no signup.

  • Private Loan Calculator

    Calculate monthly instalment, total interest and repayment for a private or family loan. Enter amount, interest rate and term — instant results. Free, no sign-up.

  • Financial vs Operational Leasing Calculator

    Compare financial (balance-sheet) leasing and operating leasing for business: monthly instalment, interest, tax shield, net total cost. Free online calculator for Poland 2026.

  • Total Credit Cost Calculator

    Calculate the total cost of credit: total interest, commission, insurance and all payments. Compare bank offers using the APR (RRSO) indicator.

  • Credit Holiday Calculator

    Calculate the cost of a credit holiday: interest accrued while payments are suspended and the new instalment after resuming. Free online calculator.

  • Loan Refinancing Calculator

    Calculate whether refinancing your loan is worth it. Find your new monthly payment, monthly savings and break-even point in months.

  • Effective APR (RRSO) Calculator

    Estimate the effective APR (RRSO) of a consumer loan. The calculator factors in the nominal rate and the upfront commission, returning the payment, total payments and total cost.

See the whole Loan calculators category →

Health calculators

32 calculators

Health calculators help you estimate BMI, understand the difference between BMR and TDEE, and work out daily calorie and macro targets. You can also calculate your hydration needs and estimate body fat percentage. Results are indicative only and are not a substitute for professional medical advice — treat them as useful information, not a diagnosis. Pick a calculator below.

  • BMI calculator

    Calculate BMI (body mass index) using the WHO formula. Check whether you are underweight, normal, overweight or obese. Free BMI calculator.

  • BMR and TDEE calculator

    Calculate BMR (basal metabolic rate) and TDEE (total daily energy expenditure) using the Mifflin-St Jeor formula. Free calculator.

  • Macronutrient Calculator

    Calculate daily macronutrient needs: protein, fat, and carbohydrates in grams and kcal. Choose your diet goal: weight loss, maintenance, or muscle gain.

  • Due date calculator

    Calculate your estimated due date (EDD) from your last menstrual period (LMP) using Naegele's rule. See gestational age in weeks and days until delivery — free.

  • Metabolic age calculator

    Calculate your metabolic age using the Mifflin–St Jeor BMR formula. Find out whether your metabolism is younger or older than your actual age.

  • Pregnancy week calculator

    Calculate your pregnancy week and estimated due date from your last menstrual period (LMP). See the trimester and days until delivery. Indicative result — not a substitute for medical advice.

  • Daily Water Intake Calculator

    Calculate your daily water intake based on body weight, physical activity and temperature. Result in ml, litres and glasses. Free hydration calculator.

  • Glycemic Index and Glycemic Load Calculator

    Calculate the glycemic load of a food portion based on its glycemic index, serving size and carbohydrate content. Check GI and GL categories. Free calculator for diabetics and dietitians.

  • Child BMI Calculator

    Calculate your child's BMI and find out the weight category (underweight, healthy, overweight, obese) based on simplified WHO norms. Ages 2–18. Result is indicative — consult a pediatrician.

  • Weight Loss Calculator

    Calculate how many weeks it will take to reach your target weight and what daily calorie deficit you need. Enter your current weight, goal and pace — instant result.

  • Ketogenic Diet Calculator

    Calculate your daily caloric needs and keto macros: 75% fat, 20% protein, max 25g carbs. Uses the Mifflin-St Jeor formula. Free online tool.

  • Menstrual Cycle Calculator

    Calculate your current cycle day, ovulation date, and next period. Find your cycle phase online — fast and free menstrual cycle tracker.

  • Sleep Calculator

    Sleep calculator finds the best bedtime based on your desired wake-up time using 90-minute sleep cycles. Wake up refreshed every morning!

  • Caffeine Calculator

    Calculate your total daily caffeine intake from coffee, tea, energy drinks and cola. See how much caffeine remains after 6 and 12 hours and your mg/kg body weight ratio.

  • Child Height Calculator

    Calculate your child's predicted adult height using the mid-parental height method. Enter mom's and dad's height, choose the child's sex, and get a prediction with range.

  • Cholesterol Calculator

    Check your LDL, HDL, triglyceride levels and cardiovascular risk according to ESC 2021 guidelines. Fast lipid profile assessment online.

  • Body Fat Calculator — US Navy method

    Estimate your body fat percentage using the US Navy method from body measurements and height. Free online calculator with a 1-5 category code — no registration.

  • Protein Intake Calculator

    Calculate your daily protein needs from body weight and activity level. See protein per meal and calories from protein — instant result.

See the whole Health calculators category →

Personal finance calculators

28 calculators

Inflation erodes the real value of money. The 50/30/20 budget rule splits take-home pay into needs, wants, and savings. The time value of money shows what a future sum is worth today, the DTI ratio measures debt burden, and an emergency fund of 3–6 months of expenses shields you from unexpected costs. Pick a calculator below.

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Time and date calculators

7 calculators

Calculate your exact age in years, months and days, find the number of days between any two dates, count Polish working days excluding public holidays, determine your annual leave entitlement (20 or 26 days) and look up the ISO week number for any date. Our tools handle leap years accurately. Pick a calculator below.

  • Age calculator

    Calculate your exact age in years, months and days. Find out how many days until your next birthday. Free age calculator.

  • Days between dates calculator

    Calculate the number of days, weeks, months and working days between two dates. Free online date difference calculator.

  • Add or subtract days from a date

    Add or subtract any number of days, weeks or months from a date. Free online date calculator — instantly find the resulting date for any deadline.

  • Polish vacation days calculator

    Find out how many vacation days you are entitled to in Poland. Enter your total years of service and the calculator instantly shows 20 or 26 days per Polish Labour Code.

  • Poland work hours calculator 2026

    Calculate nominal working hours for any month or full year in Poland 2026. Accounts for all public holidays under the Labour Code Art. 130. Free, instant results.

  • Week number calculator (ISO 8601)

    Find the ISO 8601 week number for any date. Enter year, month and day — the calculator returns the week number, ISO year and day of the week instantly. Free.

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Tax calculators

21 calculators

Calculate income tax under the scale, flat tax and lump-sum regimes, the health contribution by tax form and your tax refund, plus property, rental, inheritance and civil-law transaction taxes. The calculators below suit an employee filing an annual PIT return, a sole trader comparing tax forms, and anyone renting out a flat. All use the current thresholds and tax-free amount. Results are indicative and are not tax advice — pick the right calculator below.

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Business calculators

27 calculators

Calculate net take-home from B2B, compare tax forms and plan costs. Pick a calculator below.

  • Payback Period Calculator

    Calculate the payback period of an investment in months and years. Enter initial outlay and monthly cash flow. Free payback period calculator.

  • Profit margin and markup calculator

    Calculate profit margin percentage, markup, and unit profit for any product or service. Free online margin calculator for retailers, e-commerce, and businesses 2026.

  • Employee Cost Calculator

    Calculate the total cost of employing a worker in Poland (TCoE): gross salary + employer ZUS contributions (20.48%). Free online calculator for employers and HR.

  • Break-Even Calculator (BEP)

    Calculate your break-even point (BEP) in units and revenue. Enter fixed costs, selling price and variable cost per unit — get instant results. Free online tool.

  • Freelance Hourly Rate Calculator

    Calculate the minimum hourly rate to reach your target net income as a freelancer in Poland. Includes ZUS, income tax (flat/scale/lump-sum) and VAT — free online tool.

  • Asset Depreciation Calculator

    Calculate asset depreciation using the straight-line or double declining balance method. Enter cost, useful life and method — get annual depreciation, book value and schedule. Free.

  • Discount & Markup Calculator

    Calculate discounted price, discount percentage, original price or markup and margin. Free online discount and markup calculator for buyers and sellers.

  • B2B vs Employment Calculator 2026

    Compare monthly net income from B2B (self-employment) vs a Polish employment contract (UoP) in 2026. ZUS variants, flat 19% or progressive tax — free online.

  • Sales Commission Calculator

    Calculate sales commission online: set rate, guaranteed minimum and VAT option. Get gross and net commission in seconds.

  • Business closure cost calculator Poland 2026

    Estimate the cost of closing a business in Poland: sole proprietorship (JDG), civil partnership or limited liability company (sp. z o.o.). Includes admin fees, employee rights and tax arrears.

  • Business Sale Profit Calculator

    Calculate the net profit from selling a business in Poland after 19% PIT/CIT tax. Includes transaction costs and acquisition value — free online calculator.

  • Product Pricing Calculator

    Calculate your product's selling price using cost-plus pricing. Find the break-even price, target price, unit profit, and markup. Free online pricing calculator for sellers.

  • E-commerce Business Cost Calculator

    Calculate your online store operating costs: platform commission (Allegro, Amazon), logistics, marketing and returns. Check gross margin and profitability.

  • ROAS Calculator (Return on Ad Spend)

    Calculate ROAS, ROI and break-even ROAS for your ad campaign in seconds. See return on ad spend, net profit and whether the campaign is profitable. Free online calculator.

  • Food Cost Calculator

    Calculate food cost percentage, margin and markup on a restaurant dish. Enter ingredient cost, net menu price and VAT to get food cost %, cash margin and gross price. Free.

  • Catering Cost Calculator

    Calculate the total catering cost and the cost per guest. Enter the number of guests, food and drink cost, and service percentage — instant result.

  • 3D Printing Cost Calculator

    Calculate the cost of a 3D print: filament and energy cost. Enter mass, filament price, print time, printer power and electricity price — instant result.

See the whole Business calculators category →

ZUS Calculators

10 calculators

Find out how much social security (ZUS) you pay as an employee, contractor or sole trader in Poland, and forecast your future pension. The calculators below cover the start-up relief, preferential ZUS, Small ZUS Plus and full contributions, breaking each charge into its social and health components. They help entrepreneurs plan the monthly cost of running a business and help employees understand what is deducted from their pay. Results are indicative — pick the calculator that fits your situation.

See the whole ZUS Calculators category →

Real Estate Calculators

12 calculators

Plan a property purchase, rental or investment with a clear picture of every cost. The calculators below work out the full cost of buying a flat (PCC tax, notary and court fees, agent commission), your borrowing capacity, the price per square metre, finishing costs, the deposit and rent, and the rental yield (ROI) so you can judge whether letting pays off. They are for buyers, investors, tenants and landlords alike. Results are indicative and do not replace advice from a mortgage adviser.

See the whole Real Estate Calculators category →

Unit Converters

17 calculators

Unit converters are essential tools for everyday calculations — from length and mass to temperature, volume, speed, digital data, area and clothing sizes. Whether you work with the SI system, imperial units or international clothing standards, you will find a fast and accurate converter here. Pick a calculator below.

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Car Calculators

20 calculators

Car running costs go beyond fuel consumption — they also include vehicle excise duty on imports, registration fees and mandatory OC insurance. Our calculators help you estimate every component accurately so you can plan your motoring budget with confidence. Pick a calculator below.

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Construction Calculators

32 calculators

Plan your renovation or build with accurate quantity estimates. Calculate paint coverage for walls, the number of floor tiles, flooring panel packs, square metres of styrofoam insulation, concrete volume, and total renovation costs. Reliable figures help you avoid over-ordering and material shortfalls. Pick a calculator below.

See the whole Construction Calculators category →

Energy Calculators

17 calculators

Electricity consumption and energy costs are among the largest household expenses. Our calculators help you work out electricity bills, assess the profitability of solar PV panels, and improve the energy efficiency of your home. Tools cover current tariffs, available subsidies and real-world usage conditions. Pick a calculator below.

See the whole Energy Calculators category →

Social Benefit Calculators

9 calculators

Find out what benefits you are entitled to: sick pay, maternity benefit, 800+, carer's allowance and more.

See the whole Social Benefit Calculators category →

Education Calculators

16 calculators

Plan your education funding: check scholarship thresholds, tuition costs and student loan conditions.

  • Grade Average (GPA) Calculator

    Calculate your weighted and unweighted grade average instantly. Enter up to 5 grades and their weights to see your GPA or school grade average.

  • Matura Points Calculator

    Convert your Polish matura exam results to university recruitment points. Extended level × 1, basic level × 0.5. Check your score for university admission — free online tool.

  • Weighted Average Calculator

    Calculate the weighted average for grades, scores or any numeric values. Enter up to 5 value–weight pairs and get the result instantly. Free online tool.

  • Percentage to Grade Calculator

    Convert a percentage score to a school grade on the Polish 1–6 scale. Choose standard, hard or easy thresholds and get your grade instantly — free online tool.

  • Driving School Cost Calculator

    Calculate the total cost of a driving course in Poland for categories B, A, AM, C, D or BE. Include standard or intensive mode and extra driving hours.

  • Language Learning Cost Calculator

    Calculate the total cost of learning a foreign language — English, German, Japanese and more. Compare language schools, private tutors and online courses. Free.

  • Annual Education Costs Calculator

    Calculate total annual education costs: tuition, books, transport, extracurricular activities and housing. Free online calculator for parents and students in Poland.

  • Online Course Cost Calculator 2026

    Calculate the total cost of online courses and professional certificates over a year. Compare the cost with your potential salary increase.

  • Training ROI Calculator

    Calculate the ROI of a training investment. Enter cost, monthly salary increase and horizon to get ROI in %, net profit and payback period.

See the whole Education Calculators category →

Labour Law Calculators

15 calculators

Check your rights as an employee: how much leave you are entitled to, how much severance you receive and how long your notice period is.

  • Work Seniority Calculator

    Calculate your work seniority in Poland: enter your employment start date and find out how many years, months and days you have worked. Also shows annual leave entitlement.

  • Mileage Allowance Calculator

    Calculate your mileage allowance (kilometrówka) using 2026 Polish rates: car up to 900cc (0.89 PLN/km), over 900cc (1.15 PLN/km), motorcycle (0.69 PLN/km), moped (0.42 PLN/km).

  • Domestic Per Diem Calculator 2026

    Calculate the domestic per diem (dieta krajowa) for a business trip in Poland 2026. Rate: PLN 45/day. Trips ≤12 h = PLN 22.50, >12 h = PLN 45. Overnight lump sum PLN 67.50 — free online tool.

  • Foreign Per Diem Calculator

    Calculate your foreign per diem allowance for business trips: Germany 59 EUR, France 50 EUR, USA 59 USD and more. Handles partial days (1/3, 1/2, full) — free online tool.

  • Severance Pay Calculator

    Calculate your severance pay under Polish labour law (Act of 13 March 2003). Enter your gross salary and years of service to see the multiplier and final amount — free online tool.

  • Car Allowance Calculator

    Calculate your monthly car allowance for using a private vehicle for work purposes. Current 2026 mileage rates and km limits by city size — free online tool.

  • Business trip cost calculator (Poland)

    Calculate the total cost of a domestic business trip in Poland: daily allowances (PLN 45/day), mileage reimbursement (PLN 0.89/km), accommodation and other expenses.

  • Business trip cost calculator 2026

    Calculate the total cost of a domestic business trip: daily allowance, travel, accommodation and other expenses. Quick estimate for employees and employers.

  • Training Leave Calculator

    Calculate your pay for training leave under Polish Labour Code art. 103¹–103⁶. Quick calculator for employees enrolled in studies.

  • Vacation Entitlement Calculator

    Check how many annual leave days you are entitled to based on work seniority and years of education. Compliant with Polish Labour Code art. 154–155.

  • Unpaid Leave Calculator (Poland)

    Calculate how unpaid leave affects your net salary in Poland. Computes daily rate, gross deduction, ZUS contributions, PIT advance and net pay.

See the whole Labour Law Calculators category →

Insurance Calculators

9 calculators

Compare car, life and health insurance offers in Poland. Calculate premiums and find the best deal.

See the whole Insurance Calculators category →

Investment Calculators

17 calculators

Plan your investing with precision and a clear view of taxes. The calculators below work out the profit on a share trade, dividend income and yield, the value of an ETF portfolio, the effect of compound interest and dollar-cost averaging, and the capital-gains tax due on a stock sale (PIT-38). They are aimed at individual investors — remember that investing carries market risk and results are never guaranteed. The figures shown are indicative and do not constitute investment advice; pick the calculator that matches your case.

See the whole Investment Calculators category →

Sports & Fitness Calculators

24 calculators

Calculate your running pace per km, set Karvonen heart rate zones, find your 1 rep max for powerlifting, and estimate VO2max. The MET-based calorie calculator converts any activity into kilocalories burned, while the step counter translates distance into steps and back. Pick a calculator below.

  • Running Pace Calculator

    Calculate running pace (min/km) and speed (km/h) from distance and time. Result in mm:ss min/km format. Free pace calculator for amateur and advanced runners.

  • One-Rep Max (1RM) Calculator

    Calculate your one-rep max (1RM) using the Epley and Brzycki formulas. Enter the weight lifted and number of reps to get your estimated maximum strength.

  • VO2max Calculator (Cooper Test)

    Calculate your VO2max using the Cooper 12-minute run test formula. Enter the distance covered in meters to get your aerobic capacity and fitness level.

  • Calories Burned Calculator

    Calculate calories burned during running, cycling, swimming, and other physical activities. Enter your weight, activity type, and duration.

  • Heart Rate Zone Calculator

    Calculate your heart rate training zones. Enter your age and resting heart rate – the calculator gives you 5 training zones using the Karvonen or max HR method.

  • Calories burned calculator

    Calculate calories burned during exercise. Enter your weight, duration and activity type — the calculator uses MET values to estimate energy expenditure. Free.

  • Workout Duration Calculator

    Calculate the total duration of your strength training session based on exercises, sets, set time and rest periods. Also get your training volume. Free, no signup.

  • FTP Cycling Calculator

    Calculate your FTP (Functional Threshold Power) and cycling training zones. Supports 20-min, 8-min, and ramp test methods. Instant results in watts.

  • Body Measurements Calculator

    Calculate your WHR (waist-to-hip ratio), determine your body shape (pear/apple), and assess cardiovascular risk based on body measurements.

  • Training Plan Calculator

    Calculate your weekly training volume and session duration based on your goal, training days, and fitness level.

  • Swimming Pace Calculator

    Calculate your swimming pace per 100 m, speed in m/s and km/h, and estimated time per 1 km. Perfect for swimmers of all levels.

  • Cycling Power Zones Calculator (FTP)

    Calculate your 7 cycling power zones from your FTP (Functional Threshold Power). Based on the Coggan/TrainingPeaks model. For road cyclists, MTB riders and triathletes.

  • Weightlifting Calories Calculator

    Calculate calories burned during weightlifting. Enter your body weight, workout duration and intensity — the calculator uses MET values to estimate energy expenditure.

  • Triathlon Time Calculator

    Calculate your estimated triathlon finish time based on your swim, bike and run pace. Distances: sprint, olympic, half iron, full ironman.

  • Running Calories Burned Calculator

    Calculate how many calories you burn running based on body weight, distance and time. MET-based method with calories per kilometre — fast online calculator.

  • Max Heart Rate Calculator

    Calculate your maximum heart rate (HRmax) using the Tanaka or Fox formula and your training zones with the Karvonen method. Free online calculator for runners and cyclists.

See the whole Sports & Fitness Calculators category →

Kitchen Calculators

15 calculators

Kitchen measures such as cups and spoons are the foundation of accurate cooking. A recipe scaling tool adjusts ingredient proportions for any number of servings, while a baking temperature chart helps you set the oven correctly. Converters handle volume and weight units across different culinary traditions, so every recipe turns out exactly as intended. Pick a calculator below.

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Garden Calculators

18 calculators

Plan your garden with precision: fertilising, watering, plant density and bed area calculators.

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Legal Calculators

10 calculators

Check your rights and obligations: statutory interest, limitation periods, court costs and compensation.

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Statistics Calculators

13 calculators

Analyse data statistically: mean, median, mode, standard deviation, variance and Pearson correlation.

  • Mean, Median and Mode Calculator

    Calculate the mean, median, mode, range, sum and count for any set of numbers. Enter values separated by commas or spaces. Free, instant, no signup required.

  • Standard Deviation Calculator

    Calculate standard deviation and variance for a sample or population. Enter numbers separated by commas — instant result, no signup needed.

  • Percentile and quartile calculator

    Calculate any percentile, quartiles Q1 Q2 Q3 and interquartile range IQR for your own dataset. Uses PERCENTILE.INC linear interpolation method — fast and free.

  • Z-Score Calculator

    Calculate the z-score (standardized value) and its corresponding percentile in the normal distribution. Enter the value, mean and standard deviation — instant result.

  • Pearson Correlation Calculator

    Calculate the Pearson correlation coefficient (r) and coefficient of determination (r2) for two data series. Enter values separated by commas — instant result with interpretation, no signup needed.

  • Sample Size Calculator

    Calculate the minimum sample size for surveys and research. Choose confidence level, margin of error and expected proportion — instant result, no sign-up required.

  • Confidence Interval Calculator

    Calculate the confidence interval for a mean or proportion. Choose 90%, 95% or 99% confidence level, enter sample mean, standard deviation and sample size — instant result.

  • Chi-Square Test Calculator (χ²)

    Calculate the χ² statistic, degrees of freedom and p-value for a chi-square goodness-of-fit test. Enter observed and expected frequencies — instant result.

  • Linear Regression Calculator

    Free online linear regression calculator. Compute slope a, intercept b, R² coefficient, and predict Y for any X value. Fast and accurate.

  • One-Sample T-Test Calculator

    Calculate the t-statistic and check statistical significance of the difference between a sample mean and an expected value. Free online one-sample t-test calculator.

  • Standard Error Calculator

    Calculate the standard error of the mean (SEM) and the 95% confidence interval. Enter the mean, standard deviation and sample size — instant result.

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Calculators for parents — pregnancy and child

10 calculators

Parenting involves constant calculations — from tracking pregnancy weeks and due dates to dosing children's medications, estimating monthly diaper costs, and setting pocket money. Our parent calculators bring all the tools you need into one place, covering every stage: pregnancy, newborn care, and raising older children. Every calculator is free, runs in your browser, and requires no registration.

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Science calculators — physics and chemistry

20 calculators

Liczbnik science calculators are a free toolkit for students, teachers and engineers. Instantly compute density, electric current, solution concentration, kinetic energy and dozens of other physical and chemical quantities. Every calculator includes the formula, a short explanation and a worked example — making homework checks, exam prep and engineering verifications fast and straightforward.

  • Ohm's Law Calculator (V = I × R)

    Calculate voltage, current or resistance using Ohm's Law (V=I×R). The calculator also computes electric power. Fast, free and no registration required.

  • pH Solution Calculator

    Calculate solution pH from H+ concentration, find H+ or OH- concentration from pH, or convert pH from pOH. Instant result with solution character. Free chemistry calculator.

  • Electric Power Calculator (P = U × I)

    Calculate electric power P = U × I, voltage or electric current online. Physics calculator with results in watts and kilowatts — free, fast, no registration.

  • Dilution Calculator (C1V1 = C2V2)

    Calculate concentration after dilution, final volume, original concentration or sample volume. C1*V1=C2*V2 dilution formula — instant free results.

  • Kinetic Energy Calculator (Ek = ½mv²)

    Calculate the kinetic energy of any moving object. Enter mass and velocity — get Ek in joules, kilojoules, kilocalories and momentum instantly. Formula: Ek = ½mv².

  • Density Calculator

    Calculate the density of any substance using ρ = m/V, or solve for mass or volume. Fast physics calculator with results in kg/m³ and g/cm³ — free online tool.

  • Molar Mass Calculator

    Calculate the molar mass of any chemical compound online. Enter element symbols and atom counts, and the calculator returns the molar mass in g/mol, number of moles, or sample mass — free and instant.

  • Optics Calculator — Thin Lens

    Online optics calculator: compute image distance, magnification, and image type using the thin lens equation 1/f=1/do+1/di. Fast and accurate.

  • Wave Calculator

    Calculate wavelength, wave period and wave number online. Enter frequency and wave speed — get instant results. Universal wave physics calculator.

  • Specific Heat Calculator

    Calculate the thermal energy absorbed or released by a substance based on its mass, specific heat capacity, and temperature change using Q = mcΔT.

  • GDP per Capita Calculator

    Calculate GDP per capita in PLN and EUR, and forecast next-year GDP based on annual growth rate. Free online GDP per capita calculator.

  • Ideal Gas Law Calculator PV=nRT

    Calculate pressure, volume, moles or temperature of an ideal gas using PV=nRT. Fast science calculator with explanations and worked examples.

  • Electrostatic Force Calculator

    Calculate the electrostatic force between two electric charges using Coulomb's Law. Enter charge values, distance and the permittivity of the medium to get the force in newtons.

  • Spring Force Calculator

    Calculate spring force F = k * x, elastic potential energy, static deflection from mass and oscillation period. Free online Hooke s law calculator.

  • Speed Calculator

    Calculate average speed from distance and time. Results in m/s, km/h and pace in minutes per kilometre. Fast online speed calculator.

  • Solution Dilution Calculator

    Calculate how much concentrate and water you need to make a solution of a target concentration. C1V1 = C2V2 formula, dilution factor, instant results. Free online calculator.

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Pet calculators — dog and cat

12 calculators

Caring for a pet requires accuracy — the right food portion, knowing your animal's true biological age, and understanding daily calorie needs are the foundations of a healthy life for your companion. Our pet calculators let you convert dog or cat age to human years in seconds, determine daily feeding amounts, and check how many calories your pet needs based on body weight and activity level.

  • Dog Medication Dose Calculator — mg/kg

    Calculate the single and daily medication dose for your dog by weight (mg/kg). Convert to tablets or syrup volume. Always consult a veterinarian before giving any medication to your dog.

  • Cat Food Calculator

    Calculate how much food your cat needs per day. Enter weight, lifestyle and food calorie density — get RER, MER and grams of dry or wet food plus pouch count. Free, no signup required.

  • Dog Food Calculator

    Calculate how much food your dog needs per day. Enter weight, life stage and food calorie density — get RER, MER and grams of dry or wet food. Free, no signup required.

  • Aquarium Calculator

    Calculate your aquarium volume in litres, water weight, and the maximum recommended number of fish. Free online aquarium calculator.

  • Cat Cost Calculator

    Calculate the monthly, annual, and 10-year cost of owning a cat. Include food, vet bills, accessories, and insurance. Free online calculator 2026.

  • Veterinary Cost Calculator

    Calculate annual and monthly veterinary costs for your dog or cat. Includes check-ups, vaccinations, parasite prevention and insurance. Free online calculator.

  • Dog Cost Calculator

    Calculate the monthly and annual cost of owning a dog. Factor in dog size, food quality, vet bills, and extra expenses. Free online calculator 2026.

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Travel calculators — budget, cost split

12 calculators

Planning a trip or vacation? Our travel calculators help you estimate your total budget, split costs fairly among travel companions, convert currencies and calculate time differences between countries. All tools are free, require no registration and are designed for modern travellers — from a weekend getaway to a multi-week adventure around the world.

  • Trip split calculator 2026

    Calculate how much each person owes on a group trip. Split transport, accommodation, food and attraction costs fairly among 2–20 travellers.

  • Time zone difference calculator 2026

    Calculate the time difference between any two cities worldwide. Select two cities, enter the local time and instantly see what time it is for your contact. Covers 23 time zones.

  • Vacation cost calculator 2026

    Estimate your vacation cost for any number of people. Covers destination, travel standard and flight costs. See total cost, cost per person and daily rate.

  • Travel budget calculator 2026

    Calculate the total cost of your trip for any group size. Covers transport, accommodation, food, attractions and extras. See cost per person and per day.

  • Flight CO2 Emissions Calculator

    Calculate the CO2 emissions of your flight by distance and travel class. Find out your carbon footprint and how many trees are needed to offset it.

  • Train Trip Cost Calculator (PKP)

    Estimate the cost of a PKP train ticket for any route. Choose wagon class and apply available discounts: under-26, student, senior, or family.

  • Parking cost calculator 2026

    Calculate parking costs by city zone, parking type and duration. Applies a minimum 1-hour charge and shows estimated daily parking cost.

  • Car Rental Cost Calculator

    Calculate the total cost of renting a car: daily rate, insurance, fuel and extra fees. Fast online calculator — get your result in seconds.

  • Flight time calculator 2026

    Calculate flight duration and arrival time including time zone differences. Convert local departure time to destination local time. Perfect for trip planning.

  • Travel food budget calculator 2026

    Calculate your daily and total food cost while travelling. Factors in number of days, number of people, dining standard and the destination cost of living.

See the whole Travel calculators — budget, cost split category →

Online calculators for Poland

Liczbnik is a collection of free online calculators tailored to Polish rules — tax rates, ZUS contributions, regulations and exchange rates. Every tool runs in the browser, with no registration or installation, and results appear instantly as you type. We have grouped the tools into 30 thematic categories so you can quickly find the right calculator — from salaries and taxes, through loans and real estate, to health, mathematics and converters.

Each calculator includes a formula explanation, a step-by-step example and a set of frequently asked questions, and the rate data comes from a versioned registry updated whenever the rules change. Results are indicative and do not constitute tax, legal or medical advice — consult a specialist if in doubt. Start with the category that interests you, or use the shortcut list at the top of the page.

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