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How to use Fuel Cost Calculator
Fuel Cost Calculator. Trip fuel cost in km/L, L/100 km or MPG. L/100 km = 235.215 ÷ US MPG, or 282.481 ÷ UK MPG. 30 US MPG is 7.84 L/100 km.
The short answer
To calculate fuel cost, enter the distance, your car's fuel efficiency (km/L, L/100 km or US/UK MPG) and the fuel price per litre or gallon. Fuel used = distance × L/100 km ÷ 100, and cost = fuel used × price; split it between passengers if you share.
It runs in your browser. What you enter is not uploaded.
How to use it
Enter your values in the fields; defaults show a worked example.
Pick the units or options that apply to you.
Read the result, which updates instantly as you type.
Check the formula note under the result to see exactly how it was worked out.
Limits worth knowing
How do I convert MPG to L/100 km? L/100 km = 235.215 ÷ US MPG, or 282.481 ÷ UK MPG. 30 US MPG is 7.84 L/100 km.
Why are UK and US gallons different? A UK (imperial) gallon is 4.546 L and a US gallon is 3.785 L, so the same car shows a higher MPG in the UK.