kilowatt-hours to joules converter
Language
Convert kilowatt-hours (kWh) to joules (J), or reverse the calculation. Use the calculator, formula, worked example and conversion table below.
kilowatt-hours to joules converter
How to use this calculator
- Enter the value in the input unit. Decimal values are supported.
- Select the unit definition when a choice is available. Changing the input updates the result.
- Use Swap direction to convert back. The previous result becomes the new input.
Conversion formula
joules (J) = kilowatt-hours (kWh) × 3600000
For example: 1 kilowatt-hours (kWh) = 3600000 joules (J).
Reverse formula
kilowatt-hours (kWh) = joules (J) ÷ 3600000
Conversion table
The formula, worked example and table use the first unit definition and the direction shown in the title. The calculator also supports the reverse direction.
| kilowatt-hours (kWh) | joules (J) |
|---|---|
| 0 | 0 |
| 0.5 | 1800000 |
| 1 | 3600000 |
| 2 | 7200000 |
| 5 | 18000000 |
| 10 | 36000000 |
| 20 | 72000000 |
| 50 | 180000000 |
| 100 | 360000000 |
Frequently asked questions
Can I convert in both directions?
Yes. Use Swap direction to exchange the input and output units without opening another page.
Precision and rounding
Results are displayed with up to eight decimal places. Very small or large values use scientific notation. The calculation uses the stored conversion factor; displayed figures may be rounded. Converting units does not improve the accuracy of the original measurement.
Reference: NIST unit conversion guide
