Gigajoules to Megacalories Converter

Convert gigajoules to megacalories and back instantly with formula and common values.

Gigajoules to Megacalories: 1 GJ equals 239.00574 Mcal. To convert gigajoules to megacalories, multiply by 239.00574 (Mcal = GJ × 239.006). For example, 10 GJ = 2390.0574 Mcal.

How to Convert Gigajoules to Megacalories

To convert from gigajoules to megacalories, multiply the value by 239.00574. The conversion is linear, meaning doubling the input doubles the output.

Conversion Formula

Gigajoules to Megacalories: Mcal = GJ × 239.006
Megacalories to Gigajoules: GJ = Mcal ÷ 239.006

Gigajoules to Megacalories Conversion Chart

Gigajoules (GJ)	Megacalories (Mcal)
0.1	23.900574
0.25	59.751435
0.5	119.50287
1	239.00574
2	478.01148
3	717.01722
5	1195.0287
10	2390.0574
20	4780.1148
25	5975.1435
50	11950.287
100	23900.574
250	59751.435
1000	239005.74

Understanding the Units

What is a Gigajoule?

A gigajoule equals one billion joules (10⁹ J).

Common contexts: natural gas billing, large-scale energy reporting.

What is a Megacalorie?

A kilocalorie (kcal) equals 1,000 small calories, or 4,184 joules. In nutrition, the food "Calorie" (capital C) refers to the kilocalorie.

Common contexts: nutrition (US), metabolism, food labeling.

Real-World Reference Points

Item	Gigajoules (GJ)	Megacalories (Mcal)
Slice of bread	0.3347	80
Banana (medium)	0.4393	105
Daily intake (adult)	8.368	2000

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FAQ

How do I convert gigajoules to megacalories?

Multiply by 239.006. For example, 56 GJ × 239.006 = 13,384.3212 Mcal.

What is the formula for gigajoules to megacalories?

The formula is: Mcal = GJ × 239.006.

How many megacalories are in one gigajoule?

One gigajoule equals 239.0057 megacalories.

How many megacalories are in 1 gigajoul?

1 GJ equals 239.00574 Mcal.

How do you convert gigajoules to megacalories?

Multiply the gigajoul value by 239.00574. Formula: Mcal = GJ × 239.006.

How many megacalories are in 5 gigajoules?

5 GJ = 1195.0287 Mcal.

How do you convert megacalories back to gigajoules?

Use the inverse formula: GJ = Mcal ÷ 239.006. For example, 1 Mcal = 0.004184 GJ.

What is the difference between Gigajoul and Megacalory?

A gigajoule equals one billion joules (10⁹ J). A kilocalorie (kcal) equals 1,000 small calories, or 4,184 joules. In nutrition, the food "Calorie" (capital C) refers to the kilocalorie.