cal → kJ converter

Convert calories to kilojoules (Energy)

1 cal = 0.004184 kJ · 1 kJ = 239.0057361 cal

Common values: 10 cal 50 cal 100 cal 500 cal 1000 cal

10 cal = 0.04184 kJ

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Calories to kilojoules Conversion

1 calories (cal) is equal to 0.004184 kilojoules (kJ).

1 cal = 0.004184 kJ

or

1 kJ = 239.0057361 cal

Formula

To convert a energy from calories (cal) to kilojoules (kJ), divide the energy in calories by 239.0057361

e(kJ) = e(cal) / 239.0057361

Examples:

Convert 10 calories to kilojoules:

e(kJ) = 10cal / 239.0057361 = 0.04184 kJ

Conversion table

Calories (cal) Kilojoules (kJ)
1 cal 0.004184 kJ
2 cal 0.008368 kJ
3 cal 0.012552 kJ
5 cal 0.02092 kJ
10 cal 0.04184 kJ
20 cal 0.08368 kJ
25 cal 0.1046 kJ
50 cal 0.2092 kJ
100 cal 0.4184 kJ
250 cal 1.046 kJ
500 cal 2.092 kJ
1000 cal 4.184 kJ
Kilojoules (kJ) Calories (cal)
1 kJ 239.005736138 cal
2 kJ 478.011472275 cal
3 kJ 717.017208413 cal
5 kJ 1195.028680688 cal
10 kJ 2390.057361377 cal
20 kJ 4780.114722753 cal
25 kJ 5975.143403442 cal
50 kJ 11950.286806883 cal
100 kJ 23900.573613767 cal
250 kJ 59751.434034417 cal
500 kJ 119502.868068834 cal
1000 kJ 239005.736137667 cal

Frequently asked questions

How do I convert calories to kilojoules?

Divide the value in calories by 239.0057361 to get the result in kilojoules. For example, 5 cal ÷ 239.0057361 = 0.02092 kJ.

How many kilojoules are in 1 calories?

1 calories (cal) is equal to 0.004184 kilojoules (kJ).

How do I convert kilojoules back to calories?

Use the inverse operation: multiply the value in kilojoules by 239.0057361 to get the result in calories.

How accurate is the calories to kilojoules conversion?

The converter multiplies by the conversion factor 239.0057361 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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