Gas Mileage Calculator

Calculate US mpg, imperial mpg, km/L and L/100 km from distance traveled and fuel used.

Fuel economy

29.40182288 US mpg

  • Consumption8 L/100 km
  • Distance per liter12.5 km/L
  • Imperial mpg35.310117

How this was calculated

L/100 km = liters consumed ÷ kilometers traveled × 100.

Trip estimates do not include tolls, parking or vehicle maintenance.

Method

Consumption = fuel liters ÷ kilometers × 100. US mpg = 235.214583 ÷ consumption. Distance and fuel are converted to metric before calculating.

Worked example

500 km using 40 L gives 8 L/100 km, 12.5 km/L and approximately 29.401823 US mpg.

Assumptions and limits

For a tank-to-tank measurement, fill to the same level, track distance, then use the fuel added at the next fill. US and imperial gallons differ; use the unit on your fuel measurement.

Last updated . Results are estimates for informational purposes only.