Convert calories to megajoules

Conversion Calculator

Enter your value in the conversion calculator below.

TIP: If the result of your conversion is 0, try increasing the "Decimals".

How to convert calories to megajoules: Enter a value in the calories field and click on the "Calculate megajoules" button. Your answer will appear in the megajoules field.

Conversion Definitions

The following is a list of definitions relating to conversions between calories and megajoules.

What is a calorie (cal)?

A calorie (or thermochemical calorie) is a unit of energy in the International System of Units (SI). The symbol for calorie is cal. There are 239,005.73613767 calories in a megajoule. A calorie is measured as the quantity of heat required to raise the temperature of 1 gram of water by 1°C from a standard initial temperature at a pressure of 1 atmosphere. A calorie is also called a "small calorie" or "gram calorie".

What is a megajoule (MJ)?

A megajoule is a unit of energy in the International System of Units (SI). The symbol for megajoule is MJ. There are 0.000004184 megajoules in a calorie.

Conversion Formula

Let's take a closer look at the conversion formula so that you can do these conversions yourself with a calculator or with an old-fashioned pencil and paper.

The formula to convert from calories to megajoules is:

megajoules = calories x 0.000004184

Conversion Example

Next, let's look at an example showing the work and calculations that are involved in converting from calories to megajoules (cal to MJ).

Calorie to Megajoule Conversion Example

Task: Convert 375,000 calories to megajoules (show work)

Formula:
calories x 0.000004184 = megajoules

Calculations:
375,000 calories x 0.000004184 = 1.569 megajoules

Result:
375,000 calories is equal to 1.569 megajoules

Conversion Table

For quick reference purposes, below is a conversion table that you can use to convert from calories to megajoules.

Calories to Megajoules Conversion Chart

calories (cal)	megajoules (MJ)
1 cal	0.00000418 MJ
2 cal	0.00000837 MJ
3 cal	0.00001255 MJ
4 cal	0.00001674 MJ
5 cal	0.00002092 MJ
6 cal	0.0000251 MJ
7 cal	0.00002929 MJ
8 cal	0.00003347 MJ
9 cal	0.00003766 MJ
10 cal	0.00004184 MJ
20 cal	0.00008368 MJ
30 cal	0.00012552 MJ
40 cal	0.00016736 MJ
50 cal	0.0002092 MJ
75 cal	0.0003138 MJ
100 cal	0.0004184 MJ
250 cal	0.001046 MJ
500 cal	0.002092 MJ
750 cal	0.003138 MJ
1,000 cal	0.004184 MJ
2,500 cal	0.01046 MJ
5,000 cal	0.02092 MJ
7,500 cal	0.03138 MJ
10,000 cal	0.04184 MJ
25,000 cal	0.1046 MJ
50,000 cal	0.2092 MJ
75,000 cal	0.3138 MJ
100,000 cal	0.4184 MJ
250,000 cal	1.046 MJ

Related Units

This table provides a summary of the Energy units within their respective measurement systems.

Unit	Symbol	Measurement System	Description
calories (thermochemical)	cal	International System of Units (SI)	1 cal = 4.184 J
kilocalories	kcal	International System of Units (SI)	1,000 cal = 1 kcal
British Thermal Unit	BTU or Btu	Imperial System	1 BTU = 1,055 J
joules	J	International System of Units (SI)	base unit
kilojoules	kJ	International System of Units (SI)	1,000 J = 1 kJ
megajoules	MJ	International System of Units (SI)	1,000,000 J = 1 MJ
gigajoules	GJ	International System of Units (SI)	1,000,000,000 J = 1 GJ
terajoules	TJ	International System of Units (SI)	1,000,000,000,000 J = 1 TJ

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