Enter a fuel-economy figure and its unit — get MPG (US), MPG (UK/imperial), litres per 100 km and kilometres per litre instantly. Everything runs entirely in your browser.
Note: a US gallon (3.785 L) is smaller than a UK/imperial gallon (4.546 L), so UK MPG figures always look higher for the same car. L/100km is inversely related to MPG and km/L — a lower L/100km means better economy.