Energy Converter

This free energy converter converts between joules, kilojoules, megajoules, gigajoules, calories, kilocalories (food Calories), watt-hours, kilowatt-hours, megawatt-hours, BTU, MMBTU, US therms, foot-pounds, ergs, electronvolts, horsepower-hours and tonnes of TNT equivalent. Useful for nutrition, physics, engineering and utility bills.

Type a value, pick your units and read the result instantly, or scan the "value in every unit" table to see one figure expressed in every energy unit at once. Choose a fixed number of decimal places or let precision adapt automatically, optionally group thousands for readability, and copy any single result or the whole table with one click.