BTUs to Megajoules Converter
Enter the energy in btus below to convert it to megajoules.
Convert BTUs to Megajoules
Enter a value in btus (BTU) to convert to megajoules (MJ).
British Thermal Unit to Megajoule Conversion Table
Table showing various british thermal unit measurements converted to megajoules. Click any preset value or arrow to load it into the converter.
| BTUs (BTU) | Megajoules (MJ) |
|---|---|
| 1 BTU | 0.0010551 MJ |
| 2 BTU | 0.0021101 MJ |
| 2.5 BTU | 0.0026376 MJ |
| 5 BTU | 0.0052753 MJ |
| 10 BTU | 0.0105506 MJ |
| 15 BTU | 0.0158258 MJ |
| 20 BTU | 0.0211011 MJ |
| 25 BTU | 0.0263764 MJ |
| 30 BTU | 0.0316517 MJ |
| 50 BTU | 0.0527528 MJ |
How to Convert BTUs to Megajoules
To convert btus to megajoules, multiply the energy by the following conversion ratio: 0.0010551 megajoules/british thermal unit.
Since one british thermal unit is equal to 0.0010551 megajoules, you can use this simple formula to convert:
The energy in megajoules is equal to the energy in btus multiplied by 0.0010551.
For example, here's how to convert 5 btus to megajoules using the formula above.
How Many Megajoules Are in a British Thermal Unit?
There are 0.0010551 megajoules in a british thermal unit, which is why we use this value in the formula above.
Our british thermal unit to megajoule calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
BTUs and megajoules are both units used to measure energy. Keep reading to learn more about each unit.
What Is a British Thermal Unit?
A british thermal unit is a unit of energy equal to 1,055.0558526 joules (J), the base unit for energy. Thermal energy unit equal to 1,055.056 Joules. [1]
The british thermal unit is classified as a US customary and imperial unit of energy. BTUs can be abbreviated as BTU; for example, 1 british thermal unit can be written as 1 BTU.
When working with btus (BTU) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, btus (BTU) are widely used across large-scale industrial, bulk, and macro-level energy specifications within US customary and imperial workflows, engineering documentation, and technical data sheets.
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. [2]
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.
When converting energy between btus (BTU) and megajoules (MJ), keep full floating-point precision (1 BTU = 0.0010551 MJ; 1 MJ = 947.8171203 BTU) during intermediate calculations and round only the final megajoule figure to match your instrument tolerance.
More British Thermal Unit & Megajoule Conversions
Need to calculate in the opposite direction? Use our megajoules to btus calculator to switch your starting unit immediately. You can also explore related tools such as converting megajoules to btus, converting btus to joules, or converting btus to kilowatt-hours.
Frequently Asked Questions
References
- [1]NIST CODATA StandardNIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — BTUs (BTU) to Megajoules (MJ)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: British Thermal Unit (BTU) (BTU) & Megajoule (MJ)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (BTU to MJ)