Fuel consumption, commonly used to measure the efficiency of a vehicle or machine in terms of the distance covered, is usually measured in **miles per gallon** (mil/gal). Other frequently used units are gallons per 100 miles (gal/100mi), kilometers per liter (km/L) and liters per 100 kilometers (L/100km).

- Gallons per 100 miles
- Gallons per mile
- Kilometers per gallon
- Kilometers per liter
- Liters per 100 kilometers
- Miles per gallon
- Miles per liter

- Centimeters per liter
- Decameters per liter
- Exameters per liter
- Gigameters per liter
- Hectometers per liter
- Liters per meter
- Megameters per liter
- Meters per gallon
- Meters per liter
- Petameters per liter
- Terameters per liter