Joules to Megacalories Converter

Enter the energy in joules below to get the value converted to megacalories.


Result in Megacalories:

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1 J = 2.3901E-7 Mcal
Hint: use a scientific notation calculator to convert E notation to decimal

Do you want to convert megacalories to joules?

How to Convert Joules to Megacalories

To convert a measurement in joules to a measurement in megacalories, divide the energy by the following conversion ratio: 4,184,000 joules/megacalorie.

Since one megacalorie is equal to 4,184,000 joules, you can use this simple formula to convert:

megacalories = joules ÷ 4,184,000

The energy in megacalories is equal to the energy in joules divided by 4,184,000.

For example, here's how to convert 5,000,000 joules to megacalories using the formula above.
megacalories = (5,000,000 J ÷ 4,184,000) = 1.195029 Mcal

Joules and megacalories are both units used to measure energy. Keep reading to learn more about each unit of measure.

What Is a Joule?

The joule is the energy equal to the force on an object of one newton at a distance of one meter.[1] One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

Learn more about joules.

What Is a Megacalorie?

One megacalorie is equal to 1,000,000 calories, which is the heat needed to raise the temperature of one gram of water from 14.5 to 15.5 degrees Celsius. One megacalorie is equal to 4.184 megajoules.

Megacalories can be abbreviated as Mcal; for example, 1 megacalorie can be written as 1 Mcal.

Learn more about megacalories.

Joule to Megacalorie Conversion Table

Table showing various joule measurements converted to megacalories.
Joules Megacalories
1 J 0.00000023901 Mcal
2 J 0.00000047801 Mcal
3 J 0.00000071702 Mcal
4 J 0.00000095602 Mcal
5 J 0.000001195 Mcal
6 J 0.000001434 Mcal
7 J 0.000001673 Mcal
8 J 0.000001912 Mcal
9 J 0.0000021511 Mcal
10 J 0.0000023901 Mcal
100 J 0.000023901 Mcal
1,000 J 0.000239 Mcal
10,000 J 0.00239 Mcal
100,000 J 0.023901 Mcal
1,000,000 J 0.239006 Mcal
10,000,000 J 2.3901 Mcal


  1. International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019,

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