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Car Rental Cost Calculator

Renting a car is a convenient option when travelling, but the total cost can easily exceed expectations if insurance, fuel, and additional fees are not factored in. Our car rental cost calculator lets you quickly and accurately estimate how much you will pay, taking into account the daily rate, number of rental days, insurance cost, planned kilometres, and fuel price. Use it to compare different rental offers and choose the best deal.

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How the calculator works

The calculator computes the base cost as the product of the number of rental days and the daily rate. Fuel cost is derived from: consumption (l) = fuel consumption (l/100km) x planned km / 100, then multiplied by the fuel price. The total cost is the sum of: base cost + insurance + fuel cost + additional fees. The calculator also provides the average cost per day (total cost / days) and cost per kilometre (total cost / km), making it easy to compare offers.

Calculation example

You rent a car for 5 days at PLN 150 per day. Insurance totals PLN 200. You plan to drive 400 km; the car consumes 7 l/100km and fuel costs PLN 6.50 per litre. Additional fees (GPS, cleaning): PLN 50. Calculation: base cost = 5 x 150 = PLN 750; fuel consumption = 7 x 400 / 100 = 28 l; fuel cost = 28 x 6.50 = PLN 182; total cost = 750 + 200 + 182 + 50 = PLN 1,182; average cost per day = PLN 236.40; cost per km = PLN 2.96/km.

Frequently asked questions

How much does it cost to rent a car in Poland for a week?

The average cost of renting a car in Poland for 7 days ranges from PLN 500 to PLN 1,500 depending on the vehicle class and rental company. Economy cars cost around PLN 80–120 per day, mid-range cars PLN 120–200 per day, and premium vehicles over PLN 300 per day. Insurance, fuel and any additional fees must be added on top of the base rate.

What is included in the total car rental cost?

The total rental cost includes: the daily rental rate (base cost), insurance (third-party liability, comprehensive, roadside assistance), fuel costs, and additional fees such as a security deposit (refunded after return), GPS, child seat, additional driver, vehicle cleaning, and potential charges for exceeding the kilometre limit.

How do I calculate fuel costs during a car rental?

Fuel cost is calculated using the formula: consumption (l) = fuel economy (l/100km) x km / 100, then fuel cost = consumption x fuel price (PLN/l). Example: if the car consumes 7 l/100km, you plan to drive 500 km, and fuel costs PLN 6.50/l, the fuel cost will be: 35 l x PLN 6.50 = PLN 227.50.

Rental company insurance can be expensive (PLN 20–80 per day), but it protects against high costs in the event of damage. Check whether your credit card offers rental car protection — many premium cards automatically insure rental vehicles. Alternatively, you can purchase affordable insurance from online brokers.

Required documents typically include: a valid driving licence (in Poland, category B covers vehicles up to 3.5 t), an identity card or passport, and a credit or debit card for the security deposit. The driver must be at least 18–21 years old (depending on the rental company) and must have held a licence for at least 1–2 years.

A security deposit is an amount blocked on your card as security against potential damage or exceeding the kilometre limit. It typically ranges from PLN 500 to PLN 3,000 depending on the vehicle class and insurance coverage. After returning the car in undamaged condition, the deposit is released, which usually takes 5–14 working days.

Many rental companies offer unlimited kilometres, but some impose a daily or weekly limit (e.g. 200–300 km per day). Each additional kilometre costs PLN 0.30–1.00. For longer journeys, it is worth choosing unlimited-kilometre offers, even if the daily rate is slightly higher.

The choice of fuel type depends on the nature of your trip. Diesel works well for long motorway journeys (low fuel consumption, approx. 5–6 l/100km), while petrol is better for short urban distances. Hybrids and electric vehicles are economical but require charging planning. The calculator lets you compare fuel costs for different consumption values.

Booking in advance (2–4 weeks ahead) is generally cheaper, especially in summer and during holidays. Prices can rise by 50–100% at peak season. Price comparison platforms (e.g. Rentalcars, Kayak) help find the best deal. Avoiding one-way rentals (different pick-up and drop-off locations) also reduces costs.

The calculator uses the formula: base cost = days x daily rate; fuel cost = fuel consumption (l/100km) x km / 100 x fuel price; total cost = base cost + insurance + fuel cost + additional fees. Results also include average cost per day and cost per kilometre, making it easy to compare different rental offers.

Results are indicative only and do not constitute a commercial offer. Actual prices may vary depending on the rental company, period, and additional contract conditions.

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