Convert Joules to Kilojoules

Enter the energy in joules below to get the value converted to kilojoules.

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1 J = 0.001 kJ

How to Convert Joules to Kilojoules

To convert a joule measurement to a kilojoule measurement, multiply the energy by the conversion ratio. One joule is equal to 0.001 kilojoules, so use this simple formula to convert:

kilojoules = joules × 0.001

The energy in kilojoules is equal to the joules multiplied by 0.001.

For example, here's how to convert 5 joules to kilojoules using the formula above.
5 J = (5 × 0.001) = 0.005 kJ

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

Joules

The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J, for example 1 joule can be written as 1 J.

Kilojoules

One kilojoule is equal to 1,000 joules, which are 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 103. Kilojoules can be abbreviated as kJ, for example 1 kilojoule can be written as 1 kJ.

Joule Measurements and Equivalent Kilojoule Conversions

Common joule values converted to the equivalent kilojoule value
Joules Kilojoules
1 J 0.001 kJ
2 J 0.002 kJ
3 J 0.003 kJ
4 J 0.004 kJ
5 J 0.005 kJ
6 J 0.006 kJ
7 J 0.007 kJ
8 J 0.008 kJ
9 J 0.009 kJ
10 J 0.01 kJ
11 J 0.011 kJ
12 J 0.012 kJ
13 J 0.013 kJ
14 J 0.014 kJ
15 J 0.015 kJ
16 J 0.016 kJ
17 J 0.017 kJ
18 J 0.018 kJ
19 J 0.019 kJ
20 J 0.02 kJ
21 J 0.021 kJ
22 J 0.022 kJ
23 J 0.023 kJ
24 J 0.024 kJ
25 J 0.025 kJ
26 J 0.026 kJ
27 J 0.027 kJ
28 J 0.028 kJ
29 J 0.029 kJ
30 J 0.03 kJ
31 J 0.031 kJ
32 J 0.032 kJ
33 J 0.033 kJ
34 J 0.034 kJ
35 J 0.035 kJ
36 J 0.036 kJ
37 J 0.037 kJ
38 J 0.038 kJ
39 J 0.039 kJ
40 J 0.04 kJ

More Joule Energy Conversions

Joules
Convert to Megajoules
1 J is equal to 1.0E-6 megajoules
Convert to Gigajoules
1 J is equal to 1.0E-9 gigajoules
Calories
Convert to Calories
1 J is equal to 0.239006 calories
Convert to Kilocalories
1 J is equal to 0.000239 kilocalories
Convert to Megacalories
1 J is equal to 2.3901E-7 megacalories
Watts x Time
Convert to Watt-hours
1 J is equal to 0.000278 watt-hours
Convert to Kilowatt-hours
1 J is equal to 2.7778E-7 kilowatt-hours
Convert to Megawatt-hours
1 J is equal to 2.7778E-10 megawatt-hours
Convert to Watt-seconds
1 J is equal to 1 watt-seconds
Thermal Units
Convert to British Thermal Units
1 J is equal to 0.000948 british thermal units
Convert to Million BTU
1 J is equal to 9.4782E-10 million BTU
Convert to Therms
1 J is equal to 9.4782E-9 therms
Convert to Quads
1 J is equal to 9.4782E-19 quads
Electronvolts
Convert to Electronvolts
1 J is equal to 6,241,500,000,000,000,000 electronvolts
Convert to Kiloelectronvolts
1 J is equal to 6,241,500,000,000,000 kiloelectronvolts
Convert to Megaelectronvolts
1 J is equal to 6,241,509,343,260.2 megaelectronvolts