Joules to Megajoules Converter
Convert joules (watt-seconds) (J) to megajoules (MJ), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 J = 1e-6 MJ
- 1 × 1e-6 = 1e-6 MJ
How to convert joules to megajoules
1 J = 1 × 10⁻⁶ MJ, so multiply by 1 to go from joules (watt-seconds) to megajoules. Going the other way, 1 MJ = 1,000,000 J.
MJ = J × 1 J = MJ × 1,000,000
Worked example:
1 J = 1e-6 MJ 5 × 1e-6 = 5e-6 MJ
Joules to megajoules table
| Joules | Megajoules |
|---|---|
| 1 J | 1 × 10⁻⁶ MJ |
| 2 J | 2 × 10⁻⁶ MJ |
| 3 J | 3 × 10⁻⁶ MJ |
| 4 J | 4 × 10⁻⁶ MJ |
| 5 J | 5 × 10⁻⁶ MJ |
| 6 J | 6 × 10⁻⁶ MJ |
| 7 J | 7 × 10⁻⁶ MJ |
| 8 J | 8 × 10⁻⁶ MJ |
| 9 J | 9 × 10⁻⁶ MJ |
| 10 J | 1 × 10⁻⁵ MJ |
| 15 J | 1.5 × 10⁻⁵ MJ |
| 20 J | 2 × 10⁻⁵ MJ |
| 25 J | 2.5 × 10⁻⁵ MJ |
| 30 J | 3 × 10⁻⁵ MJ |
| 40 J | 4 × 10⁻⁵ MJ |
| 50 J | 5 × 10⁻⁵ MJ |
| 75 J | 7.5 × 10⁻⁵ MJ |
| 100 J | 0.0001 MJ |
| 250 J | 0.00025 MJ |
| 500 J | 0.0005 MJ |
| 1000 J | 0.001 MJ |
About the units
- Joules (J)
- Joules (watt-seconds), a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).
- Megajoules (MJ)
- Megajoules, a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).
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