Watt Hour

Wh

Commonly Used Scientific Unit

The watt hour is the practical unit for battery capacity and stored electrical energy. It's displayed on battery labels and power banks worldwide.

Quick Converter

1 Wh = kJ

Controls display format. Very small or very large numbers will be shown in scientific notation (e.g., 1.5e-6).

Watt Hour (Wh)

The watt hour is the practical unit for battery capacity and stored electrical energy. It’s displayed on battery labels and power banks worldwide.

Characteristics

  • Energy unit
  • 1 Wh = 3,600 joules
  • 1 Wh = 0.001 kWh
  • Battery capacity: measured in Wh or mAh
  • Common in: batteries, power banks, portable devices

Conversions

  • 1 Wh = 3600 J
  • 1 Wh = 3.6 kJ
  • 1 Wh = 0.001 kWh
  • 1 Wh = 0.860 calories
  • 1 Wh = 0.000860 kcal
  • 1000 Wh = 1 kilowatt-hour

Related Units

Used In Regions

International Energy
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