Kilojoule to Kilowatt-Hour Converter
Convert Kilojoule (kJ) to Kilowatt-Hour (kWh) instantly. 1 kJ = 0.000278 kWh.
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1 kJ = 0.000278 kWh
Formula:
kWh = kJ × 0.0002777778With your value: 1 kJ = 0.00027778 kWh
How big is that?
Everyday references on a logarithmic scale, all expressed in kilojoule so you can sanity-check the result.
Other Kilojoule to Kilowatt-Hour conversions
Kilojoule to Kilowatt-Hour Conversion Table
| Kilojoule (kJ) | Kilowatt-Hour (kWh) |
|---|---|
| 0.5 | 0.000139 |
| 1 | 0.000278 |
| 2 | 0.000556 |
| 5 | 0.001389 |
| 10 | 0.002778 |
| 15 | 0.004167 |
| 20 | 0.005556 |
| 25 | 0.006944 |
| 50 | 0.013889 |
| 100 | 0.027778 |
| 250 | 0.069444 |
| 500 | 0.138889 |
| 1000 | 0.277778 |
Kilowatt-Hour to Kilojoule Conversion Table
| Kilowatt-Hour (kWh) | Kilojoule (kJ) |
|---|---|
| 0.5 | 1,800 |
| 1 | 3,600 |
| 2 | 7,200 |
| 5 | 18,000 |
| 10 | 36,000 |
| 15 | 54,000 |
| 20 | 72,000 |
| 25 | 90,000 |
| 50 | 180,000 |
| 100 | 360,000 |
| 250 | 900,000 |
| 500 | 1,800,000 |
| 1000 | 3,600,000 |
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.
Kilojoule (kJ)
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 Kilojoule to Kilowatt-Hour
To convert from Kilojoule (kJ) to Kilowatt-Hour (kWh), multiply the value by 0.0002777778.
Formula: kWh = kJ × 0.0002777778
Reverse: kJ = kWh × 3,600
Step-by-Step Example
- Start with your value in Kilojoule. For example: 5 kJ
- Multiply by the conversion factor: 5 x 0.0002777778
- The result is: 0.001389 kWh
About Kilojoule
The kilojoule (kJ) is a unit of energy and work. One kilojoule equals 1000 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 Kilojoule?
There are exactly 0.0002777778 Kilowatt-Hour in 1 Kilojoule. This means the conversion factor from Kilojoule to Kilowatt-Hour is 0.0002777778.
What is the formula to convert Kilojoule to Kilowatt-Hour?
The formula to convert Kilojoule to Kilowatt-Hour is: kWh = kJ × 0.0002777778. For example, to convert 10 Kilojoule to Kilowatt-Hour, you would multiply 10 by 0.0002777778.
What is a Kilojoule?
The kilojoule (kJ) is a unit of energy and work. One kilojoule equals 1000 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 Kilojoule?
The Kilojoule is commonly used in energy calculations, engineering and science, education.
Related Energy Conversions
Cite this page
UnitConvertLab. (2026). Kilojoule to Kilowatt-Hour converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/kilojoule-to-kilowatt_hour