Calculate your vehicle fuel efficiency (mileage) based on distance traveled and fuel consumed.
This tool calculates your vehicle's fuel efficiency — how far you travel per unit of fuel used — based on the distance driven and the amount of fuel consumed. It's commonly used to track a car's real-world MPG (miles per gallon) or km/L, compare fuel efficiency across trips, and estimate fuel costs.
Fuel Efficiency (MPG) = Distance Traveled (miles) ÷ Fuel Used (gallons). For metric units: Fuel Efficiency (km/L) = Distance (km) ÷ Fuel Used (liters). Fuel consumption can also be expressed as L/100km, which is the inverse relationship — lower L/100km means better efficiency.
Enter the distance you traveled and the amount of fuel used for that trip (from your fuel gauge or a full refill comparison), and the tool calculates your fuel efficiency.
Example: If you drove 300 miles and used 10 gallons of fuel, your mileage is 300 ÷ 10 = 30 MPG.
What's the difference between MPG and L/100km? MPG (miles per gallon) is used mainly in the US, where a higher number means better efficiency. L/100km (liters per 100 kilometers) is used in most other countries, where a lower number means better efficiency — they measure efficiency in inverse directions.
Why is my highway mileage better than city mileage? Highway driving involves steady speeds with less braking and idling, which uses fuel more efficiently than the frequent stops and starts of city driving.
How can I improve my fuel efficiency? Maintaining proper tire pressure, avoiding aggressive acceleration, reducing excess weight, and keeping up with regular maintenance (like air filter changes) can all noticeably improve mileage.
Should I track mileage every tank or average it over time? Tracking over several fill-ups gives a more reliable average, since a single tank can be affected by short-term factors like weather, traffic, or driving style.
Does fuel type affect mileage? Yes — factors like ethanol-blended fuel can slightly reduce mileage compared to pure gasoline, since ethanol has a lower energy density.