Convert kilowatt hour to joule
Here you can quickly calculate how many joule fit in one kilowatt hour.
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- 1 kWh = 3600000 J
- 1 J = 0 kWh
Example: kilowatt hour to joule
- 1 kilowatt hour = 3600000 joule
Kilowatt hour to joule conversion table
| kilowatt hour | joule |
|---|---|
| 1 | 3600000 |
| 2 | 7200000 |
| 5 | 18000000 |
| 10 | 36000000 |
| 20 | 72000000 |
| 50 | 180000000 |
| 100 | 360000000 |
Kilowatt hour to joule formula
To convert kilowatt hour to joule, multiply by 3600000.
1 kWh = 3600000 J
Example: 1 kilowatt hour = 3600000 joule
Common energy conversion mistakes
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Kilowatts (kW) and kilowatt-hours (kWh) are constantly confused: kW is power, how fast energy is being used right now, while kWh is an amount of energy, power times time. A 2 kW heater running for 3 hours uses 2 × 3 = 6 kWh. Your electricity bill counts kWh; your main fuse limits kW.
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The relationship is exact: 1 kWh = 3.6 MJ (3,600 kJ, because an hour has 3,600 seconds). The common slip is dividing when you should multiply: 10 kWh is 36 MJ, not 2.8. Remember the direction: kWh → MJ means times 3.6.
Quick kilowatt hour and joule conversion quiz
Score:
0
25 kilowatt hour equals 9 × 10⁷ joule.
Correct answer: 25 kilowatt hour = 9 × 10⁷ joule.
20 kilowatt hour equals 7.2 × 10⁷ joule.
Correct answer: 20 kilowatt hour = 7.2 × 10⁷ joule.
1 joule equals 2.78 × 10⁻⁷ kilowatt hour.
Correct answer: 1 joule = 2.78 × 10⁻⁷ kilowatt hour.
5 joule equals 1.39 × 10⁻⁶ kilowatt hour.
Correct answer: 5 joule = 1.39 × 10⁻⁶ kilowatt hour.
25 joule equals 6.94 × 10⁻⁶ kilowatt hour.
Correct answer: 25 joule = 6.94 × 10⁻⁶ kilowatt hour.