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Kilojoules to Calories Converter

Convert kilojoules (kJ) to calories (thermochemical) (cal), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
239.005736138 cal
joules (watt-seconds)
1,000 J
megajoules
0.001 MJ
gigajoules
1 × 10⁻⁶ GJ
kilocalories (food Calories)
0.239005736138 kcal
megacalories
0.000239005736138 Mcal
watt-hours
0.277777777778 Wh
kilowatt-hours
0.000277777777778 kWh
megawatt-hours
2.77777777778 × 10⁻⁷ MWh
British thermal units (IT)
0.947817120313 Btu
million Btu
9.47817120313 × 10⁻⁷ MMBtu
therms (100,000 Btu)
9.47817120313 × 10⁻⁶ thm
quads (10¹⁵ Btu)
9.47817120313 × 10⁻¹⁶ quad
electronvolts
6.24150907446 × 10²¹ eV
kiloelectronvolts
6.24150907446 × 10¹⁸ keV
megaelectronvolts
6.24150907446 × 10¹⁵ MeV

1 kJ = 239.005736138 cal

Show the working
  1. 1 kJ = 239.005736138 cal
  2. 1 × 239.005736138 = 239.005736138 cal

How to convert kilojoules to calories

1 kJ = 239.005736138 cal, so multiply by 239.005736138 to go from kilojoules to calories (thermochemical). Going the other way, 1 cal = 0.004184 kJ.

cal = kJ × 239.005736138
kJ = cal × 0.004184

Worked example:

1 kJ = 239.005736138 cal
5 × 239.005736138 = 1195.02868069 cal

Kilojoules to calories table

KilojoulesCalories
1 kJ239.005736138 cal
2 kJ478.011472275 cal
3 kJ717.017208413 cal
4 kJ956.022944551 cal
5 kJ1,195.02868069 cal
6 kJ1,434.03441683 cal
7 kJ1,673.04015296 cal
8 kJ1,912.0458891 cal
9 kJ2,151.05162524 cal
10 kJ2,390.05736138 cal
15 kJ3,585.08604207 cal
20 kJ4,780.11472275 cal
25 kJ5,975.14340344 cal
30 kJ7,170.17208413 cal
40 kJ9,560.22944551 cal
50 kJ11,950.2868069 cal
75 kJ17,925.4302103 cal
100 kJ23,900.5736138 cal
250 kJ59,751.4340344 cal
500 kJ119,502.868069 cal
1000 kJ239,005.736138 cal

About the units

Calories (cal)
Calories (thermochemical), a specialised unit. The thermochemical calorie, 4.184 J, used on US food labels as 1 Calorie = 1 kilocalorie. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.

Formula version 0.1.0Reviewed