Megajoules to Calories Converter
Enter the energy in megajoules below to convert it to calories.
Convert Megajoules to Calories
Enter a value in megajoules (MJ) to convert to calories (cal).
Megajoule to Gram Calorie Conversion Table
Table showing various megajoule measurements converted to calories. Click any preset value or arrow to load it into the converter.
| Megajoules (MJ) | Calories (cal) |
|---|---|
| 0.0000001 MJ | 0.0239006 cal |
| 0.0000002 MJ | 0.0478011 cal |
| 0.0000003 MJ | 0.0717017 cal |
| 0.0000004 MJ | 0.0956023 cal |
| 0.0000005 MJ | 0.1195029 cal |
| 0.0000006 MJ | 0.1434034 cal |
| 0.0000007 MJ | 0.167304 cal |
| 0.0000008 MJ | 0.1912046 cal |
| 0.0000009 MJ | 0.2151052 cal |
| 0.00000001 MJ | 0.0023901 cal |
How to Convert Megajoules to Calories
To convert megajoules to calories, multiply the energy by the following conversion ratio: 239,005.7361377 calories/megajoule.
Since one megajoule is equal to 239,005.7361377 calories, you can use this simple formula to convert:
The energy in calories is equal to the energy in megajoules multiplied by 239,005.7361377.
For example, here's how to convert 5 megajoules to calories using the formula above.
How Many Calories Are in a Megajoule?
There are 239,005.7361377 calories in a megajoule, which is why we use this value in the formula above.
Our megajoule to gram calorie calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Megajoules and calories are both units used to measure energy. Keep reading to learn more about each unit.
What Is a Megajoule?
A megajoule is a unit of energy equal to 1,000,000 joules (J), the base unit for energy. Equal to 1,000,000 Joules. [1]
The megajoule is classified as an International System of Units (SI) unit of energy. Megajoules can be abbreviated as MJ; for example, 1 megajoule can be written as 1 MJ.
In the metric system, "mega" is the standard SI prefix for millions, or 10⁶. This makes the megajoule (MJ) a convenient decimal multiple of the joule (J).
In practice, megajoules (MJ) are widely used across large-scale industrial, bulk, and macro-level energy specifications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a Gram Calorie?
A gram calorie is a unit of energy equal to 4.184 joules (J), the base unit for energy. Thermochemical gram calorie defined as 4.184 Joules. [2]
The gram calorie is classified as a standard unit of energy. Calories can be abbreviated as cal; for example, 1 gram calorie can be written as 1 cal.
When working with calories (cal) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, calories (cal) are widely used across standard energy applications within international standard workflows, engineering documentation, and technical data sheets.
When converting energy between megajoules (MJ) and calories (cal), keep full floating-point precision (1 MJ = 239,005.7361377 cal; 1 cal = 0.000004184 MJ) during intermediate calculations and round only the final gram calorie figure to match your instrument tolerance.
More Megajoule & Gram Calorie Conversions
Need to calculate in the opposite direction? Use our calories to megajoules calculator to switch your starting unit immediately. You can also explore related tools such as converting calories to megajoules, converting joules to calories, or converting calories to joules.
Convert from Megajoules
Frequently Asked Questions
References
- [1]NIST CODATA StandardNIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — Megajoules (MJ) to Calories (cal)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Megajoule (MJ) & Gram Calorie (cal) (cal)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (MJ to cal)