Joules to Calories (thermochemical)

Type a value in Joules and get the result in Calories (thermochemical), calculated exactly.

1 J ≈ 0.2390057361 cal Energy converter

From

Precision

Exact factorRounded for display to about 10 significant digits.

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cal = J ÷ 4.184

To convert Joules to Calories (thermochemical), divide the value by 4.184.

This factor is exact by definition.

Joules to Calories (thermochemical)
Joules (J)	Calories (thermochemical) (cal)
1	≈ 0.2390057
2	≈ 0.4780115
3	≈ 0.7170172
4	≈ 0.9560229
5	≈ 1.195029
6	≈ 1.434034
7	≈ 1.67304
8	≈ 1.912046
9	≈ 2.151052
10	≈ 2.390057
15	≈ 3.585086
20	≈ 4.780115
25	≈ 5.975143
30	≈ 7.170172
40	≈ 9.560229
50	≈ 11.95029
60	≈ 14.34034
70	≈ 16.7304
75	≈ 17.92543
80	≈ 19.12046
90	≈ 21.51052
100	≈ 23.90057

Values marked ≈ are rounded; the rest are exact.

Reverse table: Calories (thermochemical) to Joules

Calories (thermochemical) to Joules
Calories (thermochemical) (cal)	Joules (J)
1	4.184
2	8.368
3	12.552
4	16.736
5	20.92
6	25.104
7	29.288
8	33.472
9	37.656
10	41.84
15	62.76
20	83.68
25	104.6
30	125.52
40	167.36
50	209.2
60	251.04
70	292.88
75	313.8
80	334.72
90	376.56
100	418.4

Joules J: The SI unit of energy: one newton acting over one metre, or one watt for one second.
Calories (thermochemical) cal: The small calorie: exactly 4.184 joules.

Joules to Calories (thermochemical): what is the conversion factor?

One J is ≈ 0.2390057361 cal.

How do I convert Joules to Calories (thermochemical)?

Use the formula above. For example, 100 J = ≈ 23.90057361 cal.

Is the conversion exact?

Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.

Factors checked 19 October 2026.