Watt

W

Commonly Used Scientific Unit

The watt is the SI unit of power named after Scottish engineer James Watt. It's displayed on every electrical device, from light bulbs to appliances and power supplies.

Quick Converter

1 W = kJ

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

Watt (W)

The watt is the SI unit of power named after Scottish engineer James Watt. It’s displayed on every electrical device, from light bulbs to appliances and power supplies.

Characteristics

  • SI unit of power
  • 1 W = 1 J/s (joule per second)
  • Light bulbs: measured in watts (typical: 10-100W)
  • Device power: shown on labels (laptop charger: 65W, etc.)
  • Used in: electrical engineering, all power ratings

Conversions

  • 1 W = 0.001 kW
  • 1 W = 0.000001 MW
  • 1 W = 0.001341 hp
  • 1 W = 3.41214 BTU/h
  • 1000 W = 1 kilowatt

Related Units

Used In Regions

International Worldwide
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