Megajoule to Kilowatt-Hour Converter
Convert Megajoule (MJ) to Kilowatt-Hour (kWh) instantly. 1 MJ = 0.277778 kWh.
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27 units available
1 MJ = 0.277778 kWh
Formula:
kWh = MJ × 0.2777777778With your value: 1 MJ = 0.27777778 kWh
How big is that?
Everyday references on a logarithmic scale, all expressed in megajoule so you can sanity-check the result.
Other Megajoule to Kilowatt-Hour conversions
Megajoule to Kilowatt-Hour Conversion Table
| Megajoule (MJ) | Kilowatt-Hour (kWh) |
|---|---|
| 0.5 | 0.138889 |
| 1 | 0.277778 |
| 2 | 0.555556 |
| 5 | 1.388889 |
| 10 | 2.777778 |
| 15 | 4.166667 |
| 20 | 5.555556 |
| 25 | 6.944444 |
| 50 | 13.888889 |
| 100 | 27.777778 |
| 250 | 69.444444 |
| 500 | 138.888889 |
| 1000 | 277.777778 |
Kilowatt-Hour to Megajoule Conversion Table
| Kilowatt-Hour (kWh) | Megajoule (MJ) |
|---|---|
| 0.5 | 1.8 |
| 1 | 3.6 |
| 2 | 7.2 |
| 5 | 18 |
| 10 | 36 |
| 15 | 54 |
| 20 | 72 |
| 25 | 90 |
| 50 | 180 |
| 100 | 360 |
| 250 | 900 |
| 500 | 1,800 |
| 1000 | 3,600 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Megajoule (MJ)
Energy
Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Kilowatt-Hour (kWh)
Energy
Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Megajoule to Kilowatt-Hour
To convert from Megajoule (MJ) to Kilowatt-Hour (kWh), multiply the value by 0.2777777778.
Formula: kWh = MJ × 0.2777777778
Reverse: MJ = kWh × 3.6
Step-by-Step Example
- Start with your value in Megajoule. For example: 5 MJ
- Multiply by the conversion factor: 5 x 0.2777777778
- The result is: 1.388889 kWh
About Megajoule
The megajoule (MJ) is a unit of energy and work. One megajoule equals 1.000000 × 10^+6 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: energy calculations, engineering and science, education.
About Kilowatt-Hour
The kilowatt-hour is a unit of energy equal to 3.6 million joules, commonly used for electrical billing.
Common uses: electricity bills, energy consumption, appliances.
Frequently Asked Questions
How many Kilowatt-Hour are in 1 Megajoule?
There are exactly 0.2777777778 Kilowatt-Hour in 1 Megajoule. This means the conversion factor from Megajoule to Kilowatt-Hour is 0.2777777778.
What is the formula to convert Megajoule to Kilowatt-Hour?
The formula to convert Megajoule to Kilowatt-Hour is: kWh = MJ × 0.2777777778. For example, to convert 10 Megajoule to Kilowatt-Hour, you would multiply 10 by 0.2777777778.
What is a Megajoule?
The megajoule (MJ) is a unit of energy and work. One megajoule equals 1.000000 × 10^+6 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What is a Kilowatt-Hour?
The kilowatt-hour is a unit of energy equal to 3.6 million joules, commonly used for electrical billing.
What are the common uses of Megajoule?
The Megajoule is commonly used in energy calculations, engineering and science, education.
Related Energy Conversions
Cite this page
UnitConvertLab. (2026). Megajoule to Kilowatt-Hour converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/megajoule-to-kilowatt_hour