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Fuel Cost Calculator

Estimate petrol or diesel journey costs using UK miles per imperial gallon or litres per 100 kilometres.

Last reviewed

Fuel Cost Calculator

Estimated journey fuel cost

£14.65

Fuel needed10.10 litres
Cost per person£14.65

Reading the result

Distance is the total trip distance; double a one-way distance for a return trip. UK MPG uses an imperial, not a US, gallon.

How it works

UK MPG converts miles to imperial gallons and then litres. Litres per 100 km uses distance in kilometres. Litres are multiplied by the price in pence per litre.

Worked examples

Worked example

Consumption basis: UK MPG — distance in miles; Total distance (miles or km): 100; Economy (UK MPG or litres / 100 km): 45; Fuel price (pence per litre): 145; People sharing: 1

  1. UK MPG converts miles to imperial gallons and then litres. Litres per 100 km uses distance in kilometres. Litres are multiplied by the price in pence per litre.
  2. Fuel needed: 10.10 litres
  3. Cost per person: £14.65

Estimated journey fuel cost: £14.65

Assumptions

The result depends on the following. If any of them do not match your situation, treat the figure as indicative only.

  • Distance is the total trip distance; double a one-way distance for a return trip. UK MPG uses an imperial, not a US, gallon.

What this calculator does not do

  • Traffic, weather, driving style, parking, tolls, depreciation and electric charging are excluded.

Methodology

UK MPG converts miles to imperial gallons and then litres. Litres per 100 km uses distance in kilometres. Litres are multiplied by the price in pence per litre.

Inputs are processed locally. Displayed amounts are rounded; the calculation retains precision.

Frequently asked questions

Which distance unit should I enter?

Enter miles when choosing UK MPG, or kilometres when choosing litres per 100 km.

Can I split the journey cost?

Yes. Enter the number of people sharing fuel costs. The split covers fuel only.

Please note: Results are estimates for general information only and are not financial, tax or legal advice. Figures depend on the assumptions listed on each page and on your personal circumstances.