Fuel calculator
Monthly Fuel Cost Calculator
Estimate monthly fuel spending from your mileage, UK MPG and entered pump price.
Use this calculator
Enter your mileage, UK MPG and fuel price to estimate fuel spending.
What your result means
Monthly fuel spend changes with monthly mileage, UK MPG and the fuel price entered. The annualised amount is the same monthly scenario extended over 12 months, not a prediction of seasonal driving.
Worked example
Example values are illustrative and editable in the calculator.
- Annualised fuel used
- 1,212.3 litres
- Monthly average
- £143.45
Use your own typical monthly mileage.
Formula
Monthly cost at 1,000 miles/month
| Scenario | Estimated result |
|---|---|
| 30 UK MPG | £215.18 |
| 40 UK MPG | £161.39 |
| 50 UK MPG | £129.11 |
| 60 UK MPG | £107.59 |
Monthly mileage scenarios at 45 UK MPG and 142p/litre
| Monthly mileage | Estimated monthly cost |
|---|---|
| 500 | £71.73 |
| 750 | £107.59 |
| 1,000 | £143.45 |
| 1,250 | £179.32 |
| 1,500 | £215.18 |
Assumptions and limitations
- Fuel-only estimate; insurance and servicing are not included.
- Real MPG can differ from manufacturer figures.
Helpful questions
How can I estimate monthly mileage?
Use recent odometer or trip records, then adjust for known changes.
Can I use this for diesel?
Yes. Use your diesel price and UK MPG.
Does this include insurance or servicing?
No. It estimates fuel only.
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- Fuel Cost Calculator UK
Estimate petrol or diesel fuel needed and journey cost.