Energy Unit Converter
Online energy unit converter - convert between joules, kilowatt-hours, calories, kilocalories, BTU, electron-volts and more
What is Energy Unit Conversion?
This energy unit converter lets you quickly convert between different energy units. It supports 13 common energy units, including SI units (joules, kilojoules, megajoules, gigajoules), electrical units (watt-hours, kilowatt-hours), thermal units (calories, kilocalories), imperial units (BTU, foot-pounds), and scientific units (electron-volts, ergs). Whether you're calculating electricity costs, converting food calories, or working on physics problems, this tool gives you accurate results instantly. All calculations run locally in your browser — no data is uploaded.
How to Use
- Enter the value you want to convert
- Select the source unit (from) and target unit (to)
- Click the Convert button to see the result
- Check Related Conversions for other unit combinations
Features
Examples
kWh to Joules
1 kWh = 3,600,000 JKilocalories to Joules
1 kcal = 4,184 JCalories to Joules
1 cal = 4.184 JFAQ
How many joule is 1 kilowatt-hour?
1 kilowatt-hour equals 3600000 joule. The conversion factor is 1 kilowatt-hour = 3600000 joule.
How to convert kilowatt-hour to joule?
Multiply the kilowatt-hour value by 3600000 to get joule. For example, 1 kilowatt-hour = 3600000 joule.
What is the conversion ratio between kilowatt-hour and joule?
1 kilowatt-hour = 3600000 joule. This is a fixed ratio — just multiply or divide to convert.