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Megacalories to Gigajoules Converter

Convert megacalories (Mcal) to gigajoules (GJ), 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
0.004184 GJ
joules (watt-seconds)
4,184,000 J
kilojoules
4,184 kJ
megajoules
4.184 MJ
calories (thermochemical)
1,000,000 cal
kilocalories (food Calories)
1,000 kcal
watt-hours
1,162.22222222 Wh
kilowatt-hours
1.16222222222 kWh
megawatt-hours
0.00116222222222 MWh
British thermal units (IT)
3,965.66683139 Btu
million Btu
0.00396566683139 MMBtu
therms (100,000 Btu)
0.0396566683139 thm
quads (10¹⁵ Btu)
3.96566683139 × 10⁻¹² quad
electronvolts
2.61144739675 × 10²⁵ eV
kiloelectronvolts
2.61144739675 × 10²² keV
megaelectronvolts
2.61144739675 × 10¹⁹ MeV

1 Mcal = 0.004184 GJ

Show the working
  1. 1 Mcal = 0.004184 GJ
  2. 1 × 0.004184 = 0.004184 GJ

How to convert megacalories to gigajoules

1 Mcal = 0.004184 GJ, so multiply by 0.004184 to go from megacalories to gigajoules. Going the other way, 1 GJ = 239.005736138 Mcal.

GJ = Mcal × 0.004184
Mcal = GJ × 239.005736138

Worked example:

1 Mcal = 0.004184 GJ
5 × 0.004184 = 0.02092 GJ

Megacalories to gigajoules table

MegacaloriesGigajoules
1 Mcal0.004184 GJ
2 Mcal0.008368 GJ
3 Mcal0.012552 GJ
4 Mcal0.016736 GJ
5 Mcal0.02092 GJ
6 Mcal0.025104 GJ
7 Mcal0.029288 GJ
8 Mcal0.033472 GJ
9 Mcal0.037656 GJ
10 Mcal0.04184 GJ
15 Mcal0.06276 GJ
20 Mcal0.08368 GJ
25 Mcal0.1046 GJ
30 Mcal0.12552 GJ
40 Mcal0.16736 GJ
50 Mcal0.2092 GJ
75 Mcal0.3138 GJ
100 Mcal0.4184 GJ
250 Mcal1.046 GJ
500 Mcal2.092 GJ
1000 Mcal4.184 GJ

About the units

Megacalories (Mcal)
Megacalories, a specialised unit. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.

Formula version 0.1.0Reviewed