Conversions

Wh to kWh Calculator

Watt-hours and kilowatt-hours measure the same thing at different scales. Convert between them and see the cost.

Your details

Wh
$ /kWh

Results

Energy
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Cost
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Last updated June 30, 2026. Results update automatically as you type.

How it works

Kilowatt-hours = watt-hours ÷ 1000. Cost = kWh × rate. So 2,500 Wh equals 2.5 kWh.

Frequently asked questions

How many Wh in a kWh?

Exactly 1,000. So 500 Wh = 0.5 kWh, and 2,500 Wh = 2.5 kWh.

Why do devices use Wh?

Small batteries and power stations are often rated in Wh because their capacity is well under 1 kWh, making Wh a more convenient unit.

Is this the same as mAh?

No — mAh is charge, not energy. To convert mAh to Wh you also need the voltage (use our mAh to Wh calculator).

These calculators provide general estimates for educational purposes only and are not financial advice. Real-world results depend on factors not captured here. Verify figures independently before making any purchase or financial decision.

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