Megajoules (MJ) - Energy Conversions
A megajoule is a unit of energy in the International System of Units (SI). The symbol for megajoule is MJ.
The base unit for a megajoule is joule and the prefix is mega. The prefix mega is derived from the Greek megas meaning great and is symbolized as M. Mega denotes a factor of a million (106) which means that there are 1,000,000 joules in a megajoule.
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Unit Summary
This table provides a summary of the Energy units within their respective measurement systems.
| Unit | Symbol | Measurement System |
|---|---|---|
| calories (thermochemical) | cal | International System of Units (SI) |
| kilocalories | kcal | International System of Units (SI) |
| British Thermal Unit | BTU or Btu | Imperial System |
| joules | J | International System of Units (SI) |
| kilojoules | kJ | International System of Units (SI) |
| megajoules | MJ | International System of Units (SI) |
| gigajoules | GJ | International System of Units (SI) |
| terajoules | TJ | International System of Units (SI) |
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