Fuel Cost · UK 2025
55 MPG Fuel Cost Calculator — Annual UK Driving Cost
At 55 miles per gallon, UK petrol at 145p per litre works out at roughly 12.0p per mile, and diesel at 148p per litre is about 12.2p per mile. Over 10,000 miles, that is £1,198.49 a year on petrol.
55 mpg is the territory of efficient diesels and full hybrids in mixed driving. Hybrids typically do best in urban conditions where regenerative braking recovers energy; diesels excel on motorway runs at steady speeds.
Annual fuel cost at 55 mpg
| Annual miles | Petrol (145p/L) | Diesel (148p/L) |
|---|---|---|
| 5,000 miles | £599.25 | £611.64 |
| 7,500 miles | £898.87 | £917.47 |
| 10,000 miles | £1,198.49 | £1,223.29 |
| 12,500 miles | £1,498.11 | £1,529.11 |
| 15,000 miles | £1,797.74 | £1,834.93 |
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 55 mpg you burn 0.083 litres per mile. Multiply by your local pump price to get the exact cost per mile for your area.