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Gigajoules to Kilocalories Converter

Convert gigajoules (GJ) to kilocalories (food Calories) (kcal), 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
239,005.736138 kcal
joules (watt-seconds)
1,000,000,000 J
kilojoules
1,000,000 kJ
megajoules
1,000 MJ
calories (thermochemical)
239,005,736.138 cal
megacalories
239.005736138 Mcal
watt-hours
277,777.777778 Wh
kilowatt-hours
277.777777778 kWh
megawatt-hours
0.277777777778 MWh
British thermal units (IT)
947,817.120313 Btu
million Btu
0.947817120313 MMBtu
therms (100,000 Btu)
9.47817120313 thm
quads (10¹⁵ Btu)
9.47817120313 × 10⁻¹⁰ quad
electronvolts
6.24150907446 × 10²⁷ eV
kiloelectronvolts
6.24150907446 × 10²⁴ keV
megaelectronvolts
6.24150907446 × 10²¹ MeV

1 GJ = 239,005.736138 kcal

Show the working
  1. 1 GJ = 239005.736138 kcal
  2. 1 × 239005.736138 = 239005.736138 kcal

How to convert gigajoules to kilocalories

1 GJ = 239,005.736138 kcal, so multiply by 239,005.736138 to go from gigajoules to kilocalories (food Calories). Going the other way, 1 kcal = 4.184 × 10⁻⁶ GJ.

kcal = GJ × 239,005.736138
GJ = kcal × 4.184

Worked example:

1 GJ = 239005.736138 kcal
5 × 239005.736138 = 1195028.68069 kcal

Gigajoules to kilocalories table

GigajoulesKilocalories
1 GJ239,005.736138 kcal
2 GJ478,011.472275 kcal
3 GJ717,017.208413 kcal
4 GJ956,022.944551 kcal
5 GJ1,195,028.68069 kcal
6 GJ1,434,034.41683 kcal
7 GJ1,673,040.15296 kcal
8 GJ1,912,045.8891 kcal
9 GJ2,151,051.62524 kcal
10 GJ2,390,057.36138 kcal
15 GJ3,585,086.04207 kcal
20 GJ4,780,114.72275 kcal
25 GJ5,975,143.40344 kcal
30 GJ7,170,172.08413 kcal
40 GJ9,560,229.44551 kcal
50 GJ11,950,286.8069 kcal
75 GJ17,925,430.2103 kcal
100 GJ23,900,573.6138 kcal
250 GJ59,751,434.0344 kcal
500 GJ119,502,868.069 kcal
1000 GJ239,005,736.138 kcal

About the units

Kilocalories (kcal)
Kilocalories (food Calories), a specialised unit. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.

Formula version 0.1.0Reviewed