Online calculators for Poland

Liczbnik is a free online calculator hub built specifically for users in Poland. You will find over 600 calculation tools covering taxes, gross-to-net salary, mortgage and personal loans, VAT, ZUS social security contributions, health calculators, real estate and much more.

All calculators use current Polish regulations, tax rates, and data published by the Social Insurance Institution (ZUS), the Ministry of Finance, and other official Polish bodies. PIT thresholds, health contribution rates, and the minimum wage are updated with every regulatory change — the 2026 values are applied as the default.

Using Liczbnik is completely free. You do not need to create an account, provide an email address, or install any app. Simply open a calculator page, enter your numbers, and get an accurate result in a fraction of a second. All calculations run locally in your browser — fast and without sending data to a server.

The site is organised into 30 thematic categories so you can quickly find the right tool. Planning to take out a mortgage? Compare equal and decreasing instalments, calculate your creditworthiness, and check the APRC (RRSO). Working as a contractor or freelancer? Use our B2B calculator to compare employment vs self-employment, or calculate your flat-rate tax (ryczałt). Employees can quickly check net pay, holiday pay equivalent, or sick-pay entitlement.

We take formula accuracy seriously. Every calculator uses a verified mathematical or legal formula — not simplified approximations. Where regulations allow different scenarios (for example, different forms of business taxation), the calculator lets you choose the relevant option. Data sources and version dates are displayed on each calculator page.

Liczbnik is available in three languages: Polish (default, at liczbnik.pl), English (/en), and Ukrainian (/uk). The English and Ukrainian versions cover general-purpose tools — maths, unit converters, health calculators — as well as Poland-specific calculators aimed at foreigners living or working in Poland.

To use the site, type a search term into the search box at the top of the page (e.g. "gross to net", "BMI calculator", "mortgage") or navigate to a category in the grid above. Results are shown immediately — no page reload required.