kWh to Watts Calculator
Convert kWh to Watts with the formula, a worked example and a table of typical values. Working shown step by step.
Try your own numbers
Estimate only. Not engineering or safety advice. Check the result against the applicable standard and the equipment data, and have a competent engineer review it before it is relied on. Terms of use.
Open in the calculator with these values
Formula
Worked example
| Input | Value |
|---|---|
| Energy | 12 kWh |
| Time | 4 h |
- P = E / t = 12 kWh / 4 h = 3 kW
Typical values
| Energy (kWh) | Average power (W) |
|---|---|
| 1 | 250 |
| 5 | 1,250 |
| 12 | 3,000 |
| 24 | 6,000 |
| 50 | 12,500 |
| 100 | 25,000 |
Other inputs are the same as in the worked example above.
Assumptions
- Average over the stated time
- Energy and time cover the same period
Change the output unit to read the answer in watts. The result is an average; the instantaneous power can be higher or lower.
Frequently asked questions
How do I convert kWh to Watts?
P = E / t. Worked example: Energy 12 kWh, time 4 h gives 3,000 W.
What do I need to enter?
Enter energy and time. Change the unit of a value with its selector and the result stays the same.
What is the difference between kW and kWh?
kW (or W) is power, the rate at which energy is used. kWh (or Wh) is energy, power multiplied by time. A 1 kW load running for 1 hour uses 1 kWh.
How accurate are the results?
Every figure comes from the same tested engine as the Elecmetric calculators and is meant for estimating. Check design values against the standard and the equipment data you work to.
Related
Next steps in a design: kW to kWhEnergy ConsumptionEnergy Unit Converter
Opposite direction: Watts to kWh
Also see: Ah to kWh kWh to Ah VA to Watts Watts to VA
Formula guides: Energy and Cost Formulas: kWh and PaybackEnergy ConverterElectrical Unit Converter
All 78 conversionskWh to kW and Watts in Elecmetric