W⋅hr → kJ converter

Convert watt-hour to kilojoules (Energy)

1 W⋅hr = 3.6 kJ · 1 kJ = 0.2777777778 W⋅hr

Common values: 10 W⋅hr 50 W⋅hr 100 W⋅hr 500 W⋅hr 1000 W⋅hr

50 W⋅hr = 180 kJ

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Watt-hour to kilojoules Conversion

1 watt-hour (W⋅hr) is equal to 3.6 kilojoules (kJ).

1 W⋅hr = 3.6 kJ

or

1 kJ = 0.2777777778 W⋅hr

Formula

To convert a energy from watt-hour (W⋅hr) to kilojoules (kJ), multiply the energy in watt-hour by 3.6

e(kJ) = e(W⋅hr) × 3.6

Examples:

Convert 50 watt-hour to kilojoules:

e(kJ) = 50W⋅hr × 3.6 = 180 kJ

Conversion table

Watt-hour (W⋅hr) Kilojoules (kJ)
1 W⋅hr 3.6 kJ
2 W⋅hr 7.2 kJ
3 W⋅hr 10.8 kJ
5 W⋅hr 18 kJ
10 W⋅hr 36 kJ
20 W⋅hr 72 kJ
25 W⋅hr 90 kJ
50 W⋅hr 180 kJ
100 W⋅hr 360 kJ
250 W⋅hr 900 kJ
500 W⋅hr 1800 kJ
1000 W⋅hr 3600 kJ
Kilojoules (kJ) Watt-hour (W⋅hr)
1 kJ 0.277777778 W⋅hr
2 kJ 0.555555556 W⋅hr
3 kJ 0.833333333 W⋅hr
5 kJ 1.388888889 W⋅hr
10 kJ 2.777777778 W⋅hr
20 kJ 5.555555556 W⋅hr
25 kJ 6.944444444 W⋅hr
50 kJ 13.888888889 W⋅hr
100 kJ 27.777777778 W⋅hr
250 kJ 69.444444444 W⋅hr
500 kJ 138.888888889 W⋅hr
1000 kJ 277.777777778 W⋅hr

Frequently asked questions

How do I convert watt-hour to kilojoules?

Multiply the value in watt-hour by 3.6 to get the result in kilojoules. For example, 5 W⋅hr × 3.6 = 18 kJ.

How many kilojoules are in 1 watt-hour?

1 watt-hour (W⋅hr) is equal to 3.6 kilojoules (kJ).

How do I convert kilojoules back to watt-hour?

Use the inverse operation: divide the value in kilojoules by 3.6 to get the result in watt-hour.

How accurate is the watt-hour to kilojoules conversion?

The converter multiplies by the conversion factor 3.6 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.

Sources

Conversion factors are based on internationally recognised standards:

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