Convert Watt-hour (Wh) (wh) to Kilowatt-hour (kWh) (kwh)
Category: Energy
1 wh = 0.001 kwh
High-precision rounding: 6 decimals
How to convert watt-hour (wh) to kilowatt-hour (kwh)
We convert by pivoting through the SI base unit for Energy and applying exact factors where applicable.
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Quick conversion table
Handy values for Watt-hour (Wh) → Kilowatt-hour (kWh). Click a value to open that exact result.
Conversion formula
Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Common mistakes
- Confusing calorie (cal) with kilocalorie (kcal) on nutrition labels.
- Treating BTU definitions interchangeably without noting standard (IT vs other).
Unit facts
- Watt-hour (Wh): Watt-hour (Wh) is energy used by 1 watt for 1 hour (3,600 J); used for batteries.
- Kilowatt-hour (kWh): Kilowatt-hour (kWh) = 1,000 Wh = 3.6 MJ; main electricity billing unit.
About Energy
Energy is the capacity to do work. Joules form the SI base; Wh/kWh align with metering and batteries; calories and BTU survive in nutrition and HVAC. Conversions bridge mechanical, thermal, and electrical perspectives.
About Watt-hour (Wh)
Watt-hour (Wh)
Energy consumed by 1 W for 1 hour. Ubiquitous in batteries and electricity meters; 1 Wh = 3600 J.
History: Adopted in power systems because it mirrors billing intervals and storage capacities.
About Kilowatt-hour (kWh)
Kilowatt-hour (kWh)
Equals 1,000 Wh. Used by utilities and home energy monitoring; easy to relate to monthly costs.
History: Standard billing unit; maps neatly to real-world appliance usage and tariffs.
Related conversions from wh
Related conversions to kwh
- btu → kwh BTU (IT)
- cal → kwh Calorie (cal)
- j → kwh Joule (J)
- kcal → kwh Kilocalorie (kcal)