Gigajoules to Kilocalories Converter

1 gigajoule (GJ) equals 239,005.736138 kilocalories (kcal).

Quick answer

  • 1 gigajoule = 239,005.7361 kilocalories
  • 1 kilocalorie = 0.000004184 gigajoules
  • Formula: kcal = GJ × 239,005.736138

1 gigajoule = 239,005.7361 kilocalories

How to convert gigajoules to kilocalories

kcal = GJ × 239,005.736138

To convert gigajoules to kilocalories, multiply the number of gigajoules by 239,005.736138.

Example: 10 GJ to kcal

  1. Start with the value in gigajoules: 10 GJ.
  2. Multiply by 239,005.736138: 10 × 239,005.736138 = 2,390,057.361.
  3. Result: 10 gigajoules = 2,390,057.361 kilocalories.

Going the other way, 1 kilocalorie = 0.000004184 gigajoules, so to convert kilocalories back to gigajoules you divide by the same number. See kilocalories to gigajoules.

Gigajoules to kilocalories conversion table

Gigajoules (GJ)Kilocalories (kcal)
0.5 GJ 119,502.8681 kcal
1 GJ 239,005.7361 kcal
2 GJ 478,011.4723 kcal
3 GJ 717,017.2084 kcal
4 GJ 956,022.9446 kcal
5 GJ 1,195,028.681 kcal
6 GJ 1,434,034.417 kcal
7 GJ 1,673,040.153 kcal
8 GJ 1,912,045.889 kcal
9 GJ 2,151,051.625 kcal
10 GJ 2,390,057.361 kcal
11 GJ 2,629,063.098 kcal
12 GJ 2,868,068.834 kcal
13 GJ 3,107,074.57 kcal
14 GJ 3,346,080.306 kcal
15 GJ 3,585,086.042 kcal
16 GJ 3,824,091.778 kcal
17 GJ 4,063,097.514 kcal
18 GJ 4,302,103.25 kcal
19 GJ 4,541,108.987 kcal
20 GJ 4,780,114.723 kcal
25 GJ 5,975,143.403 kcal
30 GJ 7,170,172.084 kcal
40 GJ 9,560,229.446 kcal
50 GJ 11,950,286.81 kcal
75 GJ 17,925,430.21 kcal
100 GJ 23,900,573.61 kcal
250 GJ 59,751,434.03 kcal
500 GJ 119,502,868.1 kcal
1,000 GJ 239,005,736.1 kcal

What is a gigajoule?

The gigajoule is a billion joules. Natural gas is priced per GJ in Canada, and a ton of TNT releases about 4.2 GJ.

More about gigajoules →

What is a kilocalorie?

The kilocalorie is 1,000 calories, 4,184 joules, the energy needed to warm one kilogram of water by about 1 °C.

More about kilocalories →

Convert gigajoules to other units

Convert other units to kilocalories

Frequently asked questions

How many kilocalories are in a gigajoule?

One gigajoule is 239,005.7361 kilocalories.

How many gigajoules are in a kilocalorie?

One kilocalorie is 0.000004184 gigajoules.

What is the formula to convert gigajoules to kilocalories?

kcal = GJ × 239,005.736138.