Fuel economy converter

mpg and L/100 km — where bigger means worse. 4 units, every one shown at once.

Convert

Value

From

Basis

inverse · base litres per 100 km

—

Every unit at once	Value	Unit

the only category that runs backwards

More litres per 100 km is worse; more miles per gallon is better. The two are reciprocals, not a scale factor, so you cannot average mpg figures the way you average L/100 km. US and UK mpg differ because the gallons do.

Every fuel economy pair

12 pages, one for each direction.

L/100km → km/L L/100km → US mpg L/100km → UK mpg km/L → L/100km km/L → US mpg km/L → UK mpg US mpg → L/100km US mpg → km/L US mpg → UK mpg UK mpg → L/100km UK mpg → km/L UK mpg → US mpg

Other categories

Mass Kilograms, pounds, stone, ounces and both tons. Temperature Celsius, Fahrenheit, kelvin and Rankine. Length Metric, imperial, and the nautical mile. Volume Litres, and US and Imperial measures kept apart. Speed km/h, mph, knots and metres per second. Energy Joules, calories, watt-hours and BTU. Area Square metres, feet, acres and hectares. Time Seconds through years, with the year defined. Data Decimal MB and binary MiB, kept apart. Data rate Megabits per second versus megabytes per second. Pressure Bar, psi, atmospheres and millimetres of mercury. Power Watts, and the two different horsepowers. Angle Degrees, radians, gradians and turns. Frequency Hertz, kilohertz, megahertz and RPM. Force Newtons, kilogram-force and pounds-force. Torque Newton-metres and pound-feet. Density kg/m³, g/cm³ and pounds per cubic foot. Cooking Spoons and cups, with the country stated. Illuminance Lux and foot-candles.