Fuel Cost · UK 2025
35 MPG Fuel Cost Calculator — Annual UK Driving Cost
At 35 miles per gallon, UK petrol at 145p per litre works out at roughly 18.8p per mile, and diesel at 148p per litre is about 19.2p per mile. Over 10,000 miles, that is £1,883.34 a year on petrol.
35 mpg is roughly the real-world average for many petrol-engined family cars, including mid-size SUVs and older diesels under mixed driving. WLTP test figures are usually 10–20% higher than real-world.
Annual fuel cost at 35 mpg
| Annual miles | Petrol (145p/L) | Diesel (148p/L) |
|---|---|---|
| 5,000 miles | £941.67 | £961.15 |
| 7,500 miles | £1,412.51 | £1,441.73 |
| 10,000 miles | £1,883.34 | £1,922.31 |
| 12,500 miles | £2,354.18 | £2,402.89 |
| 15,000 miles | £2,825.01 | £2,883.46 |
Based on UK imperial gallons (4.546 litres/gallon). Pump prices fluctuate weekly — check the latest with the RAC Fuel Watch or BEIS weekly price data.
How the calculation works
UK MPG is based on the imperial gallon, which equals 4.546 litres. Cost per mile is calculated as:
At 35 mpg you burn 0.130 litres per mile. Multiply by your local pump price to get the exact cost per mile for your area.