Fuel Cost Calculator
Enter your journey distance, your car’s fuel economy and the price per litre to estimate how much fuel a trip will use and cost — split it between passengers if you’re sharing a lift.
Journey Details
Enter your trip and vehicle details
Fuel Cost Estimate
Fuel used and estimated journey cost
Typical UK Fuel Prices
Indicative average pump prices per litre, for reference only. Prices vary by fuel retailer, region and day — always check the price shown on the pump.
| Fuel Type | Approx. Price per Litre |
|---|---|
| Unleaded Petrol | £1.36 |
| Diesel | £1.44 |
| LPG (Autogas) | £0.79 |
Fuel Cost FAQ
Answers to the most frequently asked questions about estimating journey fuel costs.
Convert your car’s fuel economy to litres per 100km, multiply by the journey distance in kilometres divided by 100 to get the litres needed, then multiply by the price per litre. For example, a car using 6 litres per 100km driving 160km would use about 9.6 litres, costing roughly £13 at £1.35 per litre.
For UK (imperial) MPG, divide 282.48 by the MPG figure to get litres per 100km. For US MPG, divide 235.21 by the MPG figure instead, since a US gallon is smaller than a UK gallon. A car returning 45 UK MPG uses roughly 6.3 litres per 100km.
Splitting a journey’s fuel cost evenly between passengers is a common and straightforward way to share expenses, and can make longer trips significantly cheaper per person. Some groups also add a small amount to cover wear and tear, though this is a personal arrangement rather than a fixed rule.
Yes. Official fuel economy figures are measured under standardised test conditions and real-world consumption is often higher, especially with harsh acceleration, high speeds, short cold trips, a heavily loaded car or excessive idling. Smooth, steady driving typically brings consumption closer to the manufacturer’s figures.