Kilowatt-Hour to Watt-Hour Converter
Convert Kilowatt-Hour (kWh) to Watt-Hour (Wh) instantly. 1 kWh = 1,000 Wh.
Energy Converter
27 units available
1 kWh = 1,000 Wh
Formula:
Wh = kWh × 1,000With your value: 1 kWh = 1,000 Wh
How big is that?
Everyday references on a logarithmic scale, all expressed in kilowatt-hour so you can sanity-check the result.
Other Kilowatt-Hour to Watt-Hour conversions
Kilowatt-Hour to Watt-Hour Conversion Table
| Kilowatt-Hour (kWh) | Watt-Hour (Wh) |
|---|---|
| 0.5 | 500 |
| 1 | 1,000 |
| 2 | 2,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 15 | 15,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
| 1000 | 1,000,000 |
Watt-Hour to Kilowatt-Hour Conversion Table
| Watt-Hour (Wh) | Kilowatt-Hour (kWh) |
|---|---|
| 0.5 | 0.0005 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 15 | 0.015 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1000 | 1 |
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.
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
Watt-Hour (Wh)
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 Kilowatt-Hour to Watt-Hour
To convert from Kilowatt-Hour (kWh) to Watt-Hour (Wh), multiply the value by 1,000.
Formula: Wh = kWh × 1,000
Reverse: kWh = Wh × 0.001
Step-by-Step Example
- Start with your value in Kilowatt-Hour. For example: 5 kWh
- Multiply by the conversion factor: 5 x 1,000
- The result is: 5,000 Wh
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.
About Watt-Hour
The watt-hour (Wh) is a unit of energy and work. One watt-hour equals 3600 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.
Frequently Asked Questions
How many Watt-Hour are in 1 Kilowatt-Hour?
There are exactly 1,000 Watt-Hour in 1 Kilowatt-Hour. This means the conversion factor from Kilowatt-Hour to Watt-Hour is 1,000.
What is the formula to convert Kilowatt-Hour to Watt-Hour?
The formula to convert Kilowatt-Hour to Watt-Hour is: Wh = kWh × 1,000. For example, to convert 10 Kilowatt-Hour to Watt-Hour, you would multiply 10 by 1,000.
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 is a Watt-Hour?
The watt-hour (Wh) is a unit of energy and work. One watt-hour equals 3600 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 are the common uses of Kilowatt-Hour?
The Kilowatt-Hour is commonly used in electricity bills, energy consumption, appliances.
Related Energy Conversions
Cite this page
UnitConvertLab. (2026). Kilowatt-Hour to Watt-Hour converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/kilowatt_hour-to-watt_hour