Joule to Kilowatt-Hour Converter
Convert Joule (J) to Kilowatt-Hour (kWh) instantly. 1 J = 2.777778e-7 kWh.
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1 J = 2.777778e-7 kWh
Formula:
kWh = J × 2.777778e-7With your value: 1 J = 2.777778e-7 kWh
How big is that?
Everyday references on a logarithmic scale, all expressed in joule so you can sanity-check the result.
Other Joule to Kilowatt-Hour conversions
Joule to Kilowatt-Hour Conversion Table
| Joule (J) | Kilowatt-Hour (kWh) |
|---|---|
| 0.5 | 1.388889e-7 |
| 1 | 2.777778e-7 |
| 2 | 5.555556e-7 |
| 5 | 1.388889e-6 |
| 10 | 2.777778e-6 |
| 15 | 4.166667e-6 |
| 20 | 5.555556e-6 |
| 25 | 6.944444e-6 |
| 50 | 1.388889e-5 |
| 100 | 2.777778e-5 |
| 250 | 6.944444e-5 |
| 500 | 0.000139 |
| 1000 | 0.000278 |
Kilowatt-Hour to Joule Conversion Table
| Kilowatt-Hour (kWh) | Joule (J) |
|---|---|
| 0.5 | 1,800,000 |
| 1 | 3,600,000 |
| 2 | 7,200,000 |
| 5 | 18,000,000 |
| 10 | 36,000,000 |
| 15 | 54,000,000 |
| 20 | 72,000,000 |
| 25 | 90,000,000 |
| 50 | 180,000,000 |
| 100 | 360,000,000 |
| 250 | 900,000,000 |
| 500 | 1,800,000,000 |
| 1000 | 3,600,000,000 |
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.
Joule (J)
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 Joule to Kilowatt-Hour
To convert from Joule (J) to Kilowatt-Hour (kWh), multiply the value by 2.777778e-7.
Formula: kWh = J × 2.777778e-7
Reverse: J = kWh × 3,600,000
Step-by-Step Example
- Start with your value in Joule. For example: 5 J
- Multiply by the conversion factor: 5 x 2.777778e-7
- The result is: 1.388889e-6 kWh
About Joule
The joule is the SI unit of energy. One joule equals the work done when a force of one newton moves an object one meter.
Common uses: physics, electrical engineering, chemistry.
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 Joule?
There are exactly 2.777778e-7 Kilowatt-Hour in 1 Joule. This means the conversion factor from Joule to Kilowatt-Hour is 2.777778e-7.
What is the formula to convert Joule to Kilowatt-Hour?
The formula to convert Joule to Kilowatt-Hour is: kWh = J × 2.777778e-7. For example, to convert 10 Joule to Kilowatt-Hour, you would multiply 10 by 2.777778e-7.
What is a Joule?
The joule is the SI unit of energy. One joule equals the work done when a force of one newton moves an object one meter.
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 Joule?
The Joule is commonly used in physics, electrical engineering, chemistry.
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Cite this page
UnitConvertLab. (2026). Joule to Kilowatt-Hour converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/joule-to-kilowatt_hour