Skip to content

Calories to Megajoules Converter

Convert calories to megajoules and back instantly with formula and common values.

cal

Megajoules

0.0001

MJ

23 cal = 0.0001 MJ

MJ = cal × 4.1840e-6

Calories to Megajoules: 1 cal equals 4.18400e-6 MJ. To convert calories to megajoules, multiply by 4.18400e-6 (MJ = cal × 4.1840e-6). For example, 10 cal = 4.18400e-5 MJ.

How to Convert Calories to Megajoules

To convert from calories to megajoules, multiply the value by 4.18400e-6. The conversion is linear, meaning doubling the input doubles the output.

Conversion Formula

  • Calories to Megajoules: MJ = cal × 4.1840e-6
  • Megajoules to Calories: cal = MJ ÷ 4.1840e-6

Calories to Megajoules Conversion Chart

Calories (cal)Megajoules (MJ)
0.14.18400e-7
0.251.04600e-6
0.52.09200e-6
14.18400e-6
28.36800e-6
31.25520e-5
52.09200e-5
104.18400e-5
208.36800e-5
250.000105
500.000209
1000.000418
2500.001046
10000.004184

Understanding the Units

What is a Calorie?

The thermochemical calorie equals exactly 4.184 joules; the historical "small" calorie raised one gram of water by one degree Celsius.

Common contexts: chemistry, historical thermodynamics.

What is a Megajoule?

A megajoule equals one million joules (10⁶ J).

Common contexts: fuel energy content, industrial processes.

Related

Joules to Calories Converter

Convert joules to calories and calories to joules instantly with formula and common values.

Calories to Joules Converter

Convert calories to joules and joules to calories with precise conversion factor.

BTU to Joules Converter

Convert British Thermal Units to joules and joules to BTU for heating and energy calculations.

Kilowatt Hours to Joules Converter

Convert kilowatt hours to joules and joules to kWh for electricity and energy calculations.

Calories to Kilocalories Converter

Convert calories to kilocalories and kilocalories to calories for nutrition and science.

Joules to Kilojoules Converter

Convert joules to kilojoules and kilojoules to joules with simple metric prefix conversion.

FAQ

How do I convert calories to megajoules?

Multiply by 4.1840e-6. For example, 23 cal × 4.1840e-6 = 9.600e-5 MJ.

What is the formula for calories to megajoules?

The formula is: MJ = cal × 4.1840e-6.

How many megajoules are in one calorie?

One calorie equals 4.000e-6 megajoules.

How many megajoules are in 1 calory?

1 cal equals 4.18400e-6 MJ.

How do you convert calories to megajoules?

Multiply the calory value by 4.18400e-6. Formula: MJ = cal × 4.1840e-6.

How many megajoules are in 5 calories?

5 cal = 2.09200e-5 MJ.

How do you convert megajoules back to calories?

Use the inverse formula: cal = MJ ÷ 4.1840e-6. For example, 1 MJ = 239005.736138 cal.

What is the difference between Calory and Megajoul?

The thermochemical calorie equals exactly 4.184 joules; the historical "small" calorie raised one gram of water by one degree Celsius. A megajoule equals one million joules (10⁶ J).