kWh to kJ Converter - Kilowatt-hour to Kilojoule
Kilowatt-hour (kWh) to Kilojoule (kJ)
Direct answer
1 kWh = 3,600 kJ
kJ = kWh × 3,600
Converter
Conversion formula
kJ = kWh × 3,600
kWh = kJ × 0.000277777778
Example: 10 kWh = 10 × 3,600 = 36,000 kJ.
Common conversion table
| kWh | kJ |
|---|---|
| 1 kWh | 3,600 kJ |
| 2 kWh | 7,200 kJ |
| 5 kWh | 18,000 kJ |
| 10 kWh | 36,000 kJ |
| 20 kWh | 72,000 kJ |
| 50 kWh | 180,000 kJ |
| 100 kWh | 360,000 kJ |
| 1,000 kWh | 3,600,000 kJ |
Conversion derivation
Express both kWh and kJ in the same base unit J (joule), then cancel the shared base unit.
- 1
Rewrite kWh in the base unit
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Rewrite kJ in the base unit
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Forward conversion
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Reverse conversion
AI explanation for this conversion
This pre-generated explanation is schema-checked. Numeric results still come from the page formula and calculator.
Kilowatt-hour to Kilojoule Conversion Factor
The conversion factor from kilowatt-hours (kWh) to kilojoules (kJ) is 3,600. This is derived by expressing both units in the same base unit, the joule (J), and then finding the ratio.
Definition
A kilowatt-hour is a unit of energy equal to the energy consumed by a power of one kilowatt operating for one hour. A kilojoule is a unit of energy equal to 1,000 joules.
Principle
The conversion relies on the equivalence of energy units through the base joule. One kilowatt-hour is defined as 3,600,000 joules, and one kilojoule is 1,000 joules. Dividing the first value by the second gives the conversion factor.
Assumptions
- The conversion uses the standard definition where 1 kWh = 3,600,000 J and 1 kJ = 1,000 J.
- The factor is exact based on these definitions.
Cautions
- This is a definitional conversion, not a measured one. The factor is exact.
- Ensure you are converting between the correct units of energy (kWh and kJ) and not other related units.
FAQ
How many kJ are in 1 kWh?
1 kWh = 3,600 kJ.
How many kJ are in 10 kWh?
10 kWh = 36,000 kJ.
How many kJ are in 100 kWh?
100 kWh = 360,000 kJ.
What is the formula to convert kWh to kJ?
Use kJ = kWh × 3,600.
How many kWh are in 1 kJ?
1 kJ = 0.000277777778 kWh.
What should I check when converting kWh to kJ?
Use the conversion factor and round the result to the precision required by your calculation.