What it converts
Converts energy magnitudes among reviewed mechanical, electrical, thermal, and food-energy units.
ENERGY UNIT WORKSPACE
Energy Converter
Convert joules, watt-hours, calories, kilocalories, BTU, and related energy units with each convention labelled.
Reviewed reference factorsValues stay in this browser tabNon-negative energy magnitudes; power, billing tariffs, and nutrition advice are outside scope.
Conversion result
Your checked conversion appears here
Enter an energy quantity to compare joules, watt-hours, calories, BTU IT, and other available units.
What this tool delivers
Energy units compared on one base
The workspace converts quantities through joules and keeps energy separate from power or cost.
What you provide
One non-negative energy value, its precise source unit, the required output unit, and appropriate precision.
What you receive
A selected energy result, joule-based equation, all available equivalents, and a downloadable table.
Calculation method
How energy conversion is calculated
The source quantity is multiplied by its joule factor. The resulting joules are divided by the destination factor. Watt-hours are energy; watts alone would require a time interval.
Review the NIST energy conversion factorsQuick answers
Energy Converter questions
Is a kilowatt-hour a power unit?
No. It is energy. Power in kilowatts multiplied by elapsed hours produces kilowatt-hours.
Is a food Calorie the same as a calorie?
A food Calorie commonly means one kilocalorie, or 1,000 small calories. Select the exact unit.
Which BTU is included?
The catalogue labels the International Table BTU as BTU IT so the convention remains visible.