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Gigajoules to Calories Converter

Convert gigajoules (GJ) 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
239,005,736.138 cal
joules (watt-seconds)
1,000,000,000 J
kilojoules
1,000,000 kJ
megajoules
1,000 MJ
kilocalories (food Calories)
239,005.736138 kcal
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 = 239,005,736.138 cal

Show the working
  1. 1 GJ = 239005736.138 cal
  2. 1 × 239005736.138 = 239005736.138 cal

How to convert gigajoules to calories

1 GJ = 239,005,736.138 cal, so multiply by 239,005,736.138 to go from gigajoules to calories (thermochemical). Going the other way, 1 cal = 4.184 × 10⁻⁹ GJ.

cal = GJ × 239,005,736.138
GJ = cal × 4.184

Worked example:

1 GJ = 239005736.138 cal
5 × 239005736.138 = 1195028680.69 cal

Gigajoules to calories table

GigajoulesCalories
1 GJ239,005,736.138 cal
2 GJ478,011,472.275 cal
3 GJ717,017,208.413 cal
4 GJ956,022,944.551 cal
5 GJ1,195,028,680.69 cal
6 GJ1,434,034,416.83 cal
7 GJ1,673,040,152.96 cal
8 GJ1,912,045,889.1 cal
9 GJ2,151,051,625.24 cal
10 GJ2,390,057,361.38 cal
15 GJ3,585,086,042.07 cal
20 GJ4,780,114,722.75 cal
25 GJ5,975,143,403.44 cal
30 GJ7,170,172,084.13 cal
40 GJ9,560,229,445.51 cal
50 GJ11,950,286,806.9 cal
75 GJ17,925,430,210.3 cal
100 GJ23,900,573,613.8 cal
250 GJ59,751,434,034.4 cal
500 GJ119,502,868,069 cal
1000 GJ239,005,736,138 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