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Gas Mileage (MPG) Calculator

Calculate miles per gallon (or L/100 km) from the distance driven and the fuel used to cover it.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

mi
gal

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

MPG = miles / gallons or L/100 km = (litres × 100) / km.

In depth

Calculate miles per gallon (or L/100 km) from the distance driven and the fuel used to cover it.