cal → joule converter

Convert calories to joules (Energy)

1 cal = 4.184 joule · 1 joule = 0.2390057361 cal

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

500 cal = 2092 joule

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Calories to joules Conversion

1 calories (cal) is equal to 4.184 joules (joule).

1 cal = 4.184 joule

or

1 joule = 0.2390057361 cal

Formula

To convert a energy from calories (cal) to joules (joule), multiply the energy in calories by 4.184

e(joule) = e(cal) × 4.184

Examples:

Convert 500 calories to joules:

e(joule) = 500cal × 4.184 = 2092 joule

Conversion table

Calories (cal) Joules (joule)
1 cal 4.184 joule
2 cal 8.368 joule
3 cal 12.552 joule
5 cal 20.92 joule
10 cal 41.84 joule
20 cal 83.68 joule
25 cal 104.6 joule
50 cal 209.2 joule
100 cal 418.4 joule
250 cal 1046 joule
500 cal 2092 joule
1000 cal 4184 joule
Joules (joule) Calories (cal)
1 joule 0.239005736 cal
2 joule 0.478011472 cal
3 joule 0.717017208 cal
5 joule 1.195028681 cal
10 joule 2.390057361 cal
20 joule 4.780114723 cal
25 joule 5.975143403 cal
50 joule 11.950286807 cal
100 joule 23.900573614 cal
250 joule 59.751434034 cal
500 joule 119.502868069 cal
1000 joule 239.005736138 cal

Frequently asked questions

How do I convert calories to joules?

Multiply the value in calories by 4.184 to get the result in joules. For example, 5 cal × 4.184 = 20.92 joule.

How many joules are in 1 calories?

1 calories (cal) is equal to 4.184 joules (joule).

How do I convert joules back to calories?

Use the inverse operation: divide the value in joules by 4.184 to get the result in calories.

How accurate is the calories to joules conversion?

The converter multiplies by the conversion factor 4.184 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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