Watt-Hours to Kilojoules Converter

Enter the energy in watt-hours below to convert it to kilojoules.

Result in Kilojoules:

1 Wh = 3.6 kJ
Learn how we calculate this below

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How to Convert Watt-Hours to Kilojoules

To convert a measurement in watt-hours to a measurement in kilojoules, multiply the energy by the following conversion ratio: 3.6 kilojoules/watt-hour.

Since one watt-hour is equal to 3.6 kilojoules, you can use this simple formula to convert:

kilojoules = watt-hours × 3.6

The energy in kilojoules is equal to the energy in watt-hours multiplied by 3.6.

For example, here's how to convert 5 watt-hours to kilojoules using the formula above.

kilojoules = (5 Wh × 3.6) = 18 kJ

How Many Kilojoules Are in a Watt-Hour?

There are 3.6 kilojoules in a watt-hour, which is why we use this value in the formula above.

1 Wh = 3.6 kJ

Watt-hours and kilojoules are both units used to measure energy. Keep reading to learn more about each unit of measure.

What Is a Watt-Hour?

The watt-hour is a measure of electrical energy equal to one watt of power over a one hour period.

Watt-hours are usually abbreviated as Wh, although the formally adopted expression is W·h. The abbreviation W h is also sometimes used. For example, 1 watt-hour can be written as 1 Wh, 1 W·h, or 1 W h.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.[1]

Learn more about watt-hours.

What Is a Kilojoule?

One kilojoule is equal to 1,000 joules, which is the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for thousands, or 103. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.

Learn more about kilojoules.

Watt-Hour to Kilojoule Conversion Table

Table showing various watt-hour measurements converted to kilojoules.
Watt-hours Kilojoules
1 Wh 3.6 kJ
2 Wh 7.2 kJ
3 Wh 10.8 kJ
4 Wh 14.4 kJ
5 Wh 18 kJ
6 Wh 21.6 kJ
7 Wh 25.2 kJ
8 Wh 28.8 kJ
9 Wh 32.4 kJ
10 Wh 36 kJ
11 Wh 39.6 kJ
12 Wh 43.2 kJ
13 Wh 46.8 kJ
14 Wh 50.4 kJ
15 Wh 54 kJ
16 Wh 57.6 kJ
17 Wh 61.2 kJ
18 Wh 64.8 kJ
19 Wh 68.4 kJ
20 Wh 72 kJ
21 Wh 75.6 kJ
22 Wh 79.2 kJ
23 Wh 82.8 kJ
24 Wh 86.4 kJ
25 Wh 90 kJ
26 Wh 93.6 kJ
27 Wh 97.2 kJ
28 Wh 100.8 kJ
29 Wh 104.4 kJ
30 Wh 108 kJ
31 Wh 111.6 kJ
32 Wh 115.2 kJ
33 Wh 118.8 kJ
34 Wh 122.4 kJ
35 Wh 126 kJ
36 Wh 129.6 kJ
37 Wh 133.2 kJ
38 Wh 136.8 kJ
39 Wh 140.4 kJ
40 Wh 144 kJ

References

  1. Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf

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