Enter the energy in kilowatt-hours (kWh) and select the target unit to determine the converted value, or use the conversion factors below to manually convert kWh into watt-hours, joules, kilojoules, megajoules, BTU, or kilocalories.
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Kilowatt-Hours to Units Formula
The following formula is used to convert kilowatt-hours into another energy unit.
E_u = kWh × CF
Variables:
- Eu is the energy in the selected target unit
- kWh is the energy in kilowatt-hours
- CF is the conversion factor for the chosen unit
To convert kilowatt-hours to another unit, multiply the energy value in kWh by the correct conversion factor. For example, use 1000 for watt-hours, 3,600,000 for joules, 3600 for kilojoules, 3.6 for megajoules, 3412.14 for BTU, and 860.42 for kilocalories.
Kilowatt-Hours to Units Conversion Table
The table below lists the most common conversion factors for a reference value of 1 kWh.
| Target Unit | Conversion Factor (per 1 kWh) | 1 kWh in This Unit |
|---|---|---|
| Watt-hours (Wh) | 1000 | 1000 Wh |
| Joules (J) | 3,600,000 | 3,600,000 J |
| Kilojoules (kJ) | 3600 | 3600 kJ |
| Megajoules (MJ) | 3.6 | 3.6 MJ |
| British Thermal Units (BTU) | 3412.14 | 3412.14 BTU |
| Kilocalories (kcal) | 860.42 | 860.42 kcal |
What is a Kilowatt-Hour?
A kilowatt-hour (kWh) is a unit of energy commonly used on electricity bills. It represents using one kilowatt of power for one hour. Although energy may also be expressed in watt-hours, joules, kilojoules, megajoules, BTU, or kilocalories, all of these units describe the same physical quantity and can be converted using fixed multipliers.
This makes the kilowatt-hour especially useful in practical energy measurement, while joules and related units are often preferred in scientific, engineering, or heating and cooling applications.
How to Convert Kilowatt-Hours to Other Units?
The following steps outline how to convert kilowatt-hours into other energy units.
- First, determine the energy amount in kilowatt-hours (kWh).
- Next, choose the target energy unit such as Wh, J, kJ, MJ, BTU, or kcal.
- Then, find the correct conversion factor for that unit.
- Finally, multiply the kWh value by the conversion factor using the formula Eu = kWh × CF.
- After calculating the result, verify your answer with the converter above.
Example Problem:
Use the following example to test your knowledge.
Energy = 2.5 kWh
Target Unit = Megajoules (MJ)
Conversion Factor = 3.6
Converted Energy = 2.5 × 3.6 = 9.0 MJ
The same 2.5 kWh is also equal to 9,000,000 J because 2.5 × 3,600,000 = 9,000,000.