Gypes

Vehicle conversion tool

Fuel economy converter

Convert distance-per-fuel and fuel-per-distance measures without reversing the relationship.

Two opposite ways to report efficiency

US mpg and km/L report distance traveled per unit of fuel, so a higher number means better economy. L/100 km reports fuel consumed for a fixed distance, so a lower number means better economy.

The conversion relationship

One US gallon equals exactly 3.785411784 liters and one international mile equals exactly 1.609344 kilometers. To convert US mpg to km/L, multiply by 1.609344 and divide by 3.785411784. Convert km/L to L/100 km by dividing 100 by km/L.

US and imperial gallons differ

This tool uses the US liquid gallon. Imperial mpg uses a larger gallon and produces a different number for the same vehicle. Confirm which gallon a specification uses before comparing ratings.

Published ratings and real fuel use can differ because of speed, traffic, weather, terrain, load, maintenance, driving style, and test procedure. Results are unit conversions, not consumption predictions.