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Fuel & Mileage Calculators

Gas Mileage Calculator

Your real MPG from odometer readings and the fuel you put in at the last fill-up.

Enter values

Results update as you type.

Result

Fuel economy

26.67 MPG (US)

In L/100km
8.82
In km per litre
11.34
In the other gallon type
32.03
Distance covered
320 miles
Fuel used
45.42 litres

About the Gas Mileage Calculator

Your real MPG from odometer readings and the fuel you put in at the last fill-up.

Also known as: mpg calculator, miles per gallon, real world mpg, fuel economy from fill up.

How to use this calculator

  1. Enter i have, fuel added, gallon type and the other fields.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

MPG = miles driven ÷ gallons used

Worked example

Using the values pre-filled in the calculator above:

  • I have: Distance and fuel used
  • Distance travelled = 320 miles
  • Fuel added = 12 gallons
  • Gallon type: US gallons

the calculator returns:

  • Fuel economy: 26.67 MPG (US)
  • In L/100km: 8.82
  • In km per litre: 11.34
  • In the other gallon type: 32.03