Kilojoules to Kilowatt-hours Converter
Enter the energy in kilojoules below to convert it to kilowatt-hours.
Convert Kilojoules to Kilowatt-hours
Enter a value in kilojoules (kJ) to convert to kilowatt-hours (kWh).
Kilojoule to Kilowatt-hour Conversion Table
Table showing various kilojoule measurements converted to kilowatt-hours. Click any preset value or arrow to load it into the converter.
| Kilojoules (kJ) | Kilowatt-hours (kWh) |
|---|---|
| 1 kJ | 0.000277778 kWh |
| 2 kJ | 0.000555556 kWh |
| 2.5 kJ | 0.000694444 kWh |
| 5 kJ | 0.0013889 kWh |
| 10 kJ | 0.0027778 kWh |
| 15 kJ | 0.0041667 kWh |
| 20 kJ | 0.0055556 kWh |
| 25 kJ | 0.0069444 kWh |
| 30 kJ | 0.0083333 kWh |
| 50 kJ | 0.0138889 kWh |
How to Convert Kilojoules to Kilowatt-hours
To convert kilojoules to kilowatt-hours, multiply the energy by the following conversion ratio: 0.000277778 kilowatt-hours/kilojoule.
Since one kilojoule is equal to 0.000277778 kilowatt-hours, you can use this simple formula to convert:
The energy in kilowatt-hours is equal to the energy in kilojoules multiplied by 0.000277778.
For example, here's how to convert 5 kilojoules to kilowatt-hours using the formula above.
How Many Kilowatt-hours Are in a Kilojoule?
There are 0.000277778 kilowatt-hours in a kilojoule, which is why we use this value in the formula above.
Our kilojoule to kilowatt-hour calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Kilojoules and kilowatt-hours are both units used to measure energy. Keep reading to learn more about each unit.
What Is a Kilojoule?
A kilojoule is a unit of energy equal to 1,000 joules (J), the base unit for energy. Equal to 1,000 Joules. [1]
The kilojoule is classified as a metric and SI-compatible unit of energy. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.
In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilojoule (kJ) a convenient decimal multiple of the joule (J).
In practice, kilojoules (kJ) are widely used across large-scale industrial, bulk, and macro-level energy specifications within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Kilowatt-hour?
A kilowatt-hour is a unit of energy equal to 3,600,000 joules (J), the base unit for energy. Equal to 3.6 Megajoules (1,000 Wh). [2]
The kilowatt-hour is classified as a metric and SI-compatible unit of energy. Kilowatt-hours can be abbreviated as kWh; for example, 1 kilowatt-hour can be written as 1 kWh.
In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilowatt-hour (kWh) a convenient decimal multiple of the joule (J).
In practice, kilowatt-hours (kWh) are widely used across large-scale industrial, bulk, and macro-level energy specifications within SI metric workflows, engineering documentation, and technical data sheets.
When converting energy between kilojoules (kJ) and kilowatt-hours (kWh), keep full floating-point precision (1 kJ = 0.000277778 kWh; 1 kWh = 3,600 kJ) during intermediate calculations and round only the final kilowatt-hour figure to match your instrument tolerance.
More Kilojoule & Kilowatt-hour Conversions
Need to calculate in the opposite direction? Use our kilowatt-hours to kilojoules calculator to switch your starting unit immediately. You can also explore related tools such as converting kilowatt-hours to kilojoules, converting btus to kilowatt-hours, or converting ampere-hours to kilowatt-hours.
Convert from Kilojoules
Frequently Asked Questions
References
- [1]NIST CODATA StandardNIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — Kilojoules (kJ) to Kilowatt-hours (kWh)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Kilojoule (kJ) & Kilowatt-hour (kWh)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (kJ to kWh)