Car running costs calculator
Calculate annual and monthly car ownership costs plus cost per kilometre. Include insurance, fuel, servicing and tyres. Free Polish car cost calculator.
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Fuel Consumption & Cost Calculator 2026
Calculate your annual fuel bill, cost per 100 km and total fuel consumption in litres. Enter the annual distance, fuel consumption rate, current fuel price and fuel type. Useful for budgeting transport costs, comparing vehicles and calculating business travel reimbursements.
How the calculator works
Fuel consumed (l) = distance (km) ÷ 100 × consumption (l/100km) Annual cost = fuel consumed (l) × fuel price (PLN/l) Cost per 100 km = consumption (l/100km) × fuel price (PLN/l) Cost per km = cost per 100 km ÷ 100
Example: 15,000 km/year, 7 l/100km, petrol PLN 6.20/l
Annual mileage: 15,000 km. Consumption: 7 l/100km. Petrol price: PLN 6.20/l. Fuel used: 15,000 ÷ 100 × 7 = 1,050 l/year. Annual fuel cost: 1,050 × 6.20 = PLN 6,510. Cost per 100 km: 7 × 6.20 = PLN 43.40. Cost per km: PLN 0.434.
Frequently asked questions
How do I calculate the annual fuel cost?
Annual fuel cost = (annual distance km ÷ 100) × consumption (l/100km) × fuel price (PLN/l). Example: 15,000 km, 7 l/100km, PLN 6.20/l → 1,050 l used → PLN 6,510/year.
How much does fuel cost per 100 km?
Cost per 100 km = consumption (l/100km) × fuel price (PLN/l). For a car using 7 l/100km at PLN 6.20/l: 7 × 6.20 = PLN 43.40 per 100 km.
What is the average fuel consumption of a passenger car in Poland?
Average consumption: petrol 6–10 l/100km, diesel 5–8 l/100km, LPG 8–12 l/100km, hybrid 4–7 l/100km. Actual consumption depends on driving style, road conditions, air conditioning and load. City driving is 30–50% more expensive than motorway driving.
Is LPG cheaper than petrol?
In 2026 LPG is about PLN 3.00–3.50/l vs. petrol PLN 6.00–6.50/l. However LPG engines consume about 20–30% more fuel by volume. Cost per 100 km: LPG at 9 l/100km × PLN 3.20 = PLN 28.80; petrol at 7 l/100km × PLN 6.20 = PLN 43.40. LPG is about 30–35% cheaper.
How do I calculate fuel cost per kilometre?
Cost per km = consumption (l/100km) × fuel price (PLN/l) ÷ 100. For 7 l/100km at PLN 6.20/l: 7 × 6.20 ÷ 100 = PLN 0.434/km. This metric is needed for business travel expense reimbursement.
How much does a hybrid car save on fuel annually?
A plug-in hybrid typically uses 4.5–6 l/100km. For 15,000 km/year at 5 l/100km and PLN 6.20/l: 750 l used, annual cost PLN 4,650 — about PLN 1,860 less than a 7 l/100km petrol car. Savings grow with higher annual mileage.
How does driving style affect fuel consumption?
Aggressive driving with frequent acceleration and braking can increase fuel use by 20–40% above the manufacturer's figure. Eco-driving techniques (smooth acceleration, anticipating traffic, steady speed) can reduce consumption by 10–25%. Motorway driving at 130 km/h uses 30–50% more fuel than at the optimal 80–90 km/h.
How does fuel price affect annual running costs?
A PLN 1/l price increase for a car covering 15,000 km/year at 7 l/100km adds PLN 1,050/year (1,050 l × PLN 1). Using fuel price comparison apps can save PLN 200–500 per year.
When does an LPG conversion pay off?
An LPG installation costs PLN 2,500–5,000. Monthly saving at 15,000 km/year: approx. PLN 180 (petrol PLN 6.20/l vs. LPG PLN 3.20/l, consumption petrol 7 l / LPG 9 l). Payback period: about 14–28 months. Worthwhile for annual mileage above 12,000–15,000 km and at least 3–4 years of use.
How do I measure my car's actual fuel consumption?
Fill-to-fill method: fill the tank, record the odometer, drive normally, fill up again. Consumption = fuel added (l) ÷ km driven × 100. The on-board computer may understate consumption by 5–15% versus the fill-to-fill method. The calculator uses the value you enter.
Indicative result
Results are indicative only. Actual fuel consumption may differ from the manufacturer's declared figure. Fuel prices change frequently — enter the current price from a nearby station.
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