Road tools
Fuel Cost Calculator
Enter your journey distance, your vehicle's fuel economy, and the fuel price to calculate how much fuel you need, the total journey cost, and the cost per kilometre and per mile.
Currency
Price per
Calculate fuel needed and journey cost from distance, economy, and fuel price
The calculator converts your journey distance to kilometres, your fuel economy to kilometres per litre, and your fuel price to a per-litre price. Fuel required is distance ÷ economy, and total cost is fuel required × price per litre. All intermediate values keep full floating-point precision; rounding happens only in the displayed results.
Choose any supported currency and the results use its locale-aware symbol, number format and placement. Fuel prices can be entered in major currency units or minor units such as pence. No exchange-rate conversion is performed.
Inputs
- Journey distance — in kilometres or miles.
- Fuel economy — in UK mpg, US mpg, L/100 km, or km/L. Use a realistic real-world figure rather than the manufacturer’s laboratory figure for a more accurate estimate.
- Fuel price — per litre, per Imperial gallon, or per US gallon, matching how fuel is priced where you fill up.
Results
- Total fuel cost — the headline journey cost.
- Fuel required — in litres, so you can sanity-check against your tank size.
- Cost per kilometre and per mile — useful for expense claims, car sharing, and comparing vehicles or routes.