Gas Mileage Calculator

Use trip distance or odometer readings to calculate fuel economy in common US and metric units.

Distance method

Distance unit

Fuel unit

Distance traveled

Fuel used

—US MPG

—UK MPG

—km/L

—L/100 km

—Use actual distance and fuel added over the same interval for the most meaningful calculation.

How to use this Gas Mileage Calculator

Calculate MPG, kilometers per liter, and liters per 100 km from distance and fuel used. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.