Energy converter
Convert joules, kilojoules, kilowatt-hours and thermochemical calories.
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Value | Enter value using the definition in the method and example. |
| From | Select the unit or currency in which the entered number is currently expressed. |
| To | Select the unit or currency you need for the answer. |
Understanding your result
The converted value describes the same energy quantity in the selected target unit. Display rounding does not add precision to the original measurement.
Common mistakes
- Confusing the source and target units, or overlooking a prefix or case-sensitive symbol.
Check your calculation
- Convert to the target unit and then reverse the direction. Within display rounding, you should recover the original value.
Read the energy measurement guide · Calculation checks, sources and review limits
How do I express this energy in another unit?
Enter the known energy value and choose its source and target units. The converter expresses the same quantity in the selected target unit.
Common uses
- Compare energy amounts stated in different units.
- Translate energy measurements on a specification or meter.
How it works
The calculation passes through a shared base unit. Factors are stored centrally; calculations use floating-point arithmetic and display up to 12 significant digits. Keep extra precision until the final result.
Worked example
1 kilowatt-hour = 3,600,000 joules.