watt
| Symbol: | W |
| Category: | Power (Heat flow) |
| SI Equivalent: | 1 W |
| Dimension: | ML2T-3 |
| System: | SI |
| Notes | |
| Named in honor of the Scottish inventor James Watt (1736-1819), the watt is the unit of power in the SI system. It is equal to 1 joule of work produced per second. | |
34 conversions, showing those commonly used | Show all
1 W =
| Power (Heat flow) | ||
| Symbol | Unit Name | |
| 3.41214 | Btu (IT)/h | British thermal unit (IT) per hour |
| 9.47817×10-4 | Btu (IT)/s | British thermal unit (IT) per second |
| 9.48452×10-4 | Btu (therm.)/s | British thermal unit (therm.) per second |
| 859.858 | cal (IT)/h | calorie (IT) per hour |
| 0.238849 | cal (IT)/s | calorie (IT) per second |
| 616.438 | cal (therm.)/h | calorie (therm.) per hour |
| 0.239006 | cal (therm.)/s | calorie (therm.) per second |
| 10×106 | erg/s | erg per second |
| 2655.22 | ft-lbf/h | foot-pound force per hour |
| 0.737562 | ft-lbf/s | foot-pound force per second |
| 1.34102×10-3 | HP | horsepower (550 ft-lbf/s) |
| 1.35962×10-3 | cv, HP | horsepower (cheval-vapeur) |
| 1.35962×10-3 | HP | horsepower (metric) |
| 1.34041×10-3 | HP | horsepower (water) |
| 0.101972 | kgf-m/s | kilogram force-meter per second |
| 1×10-3 | kW | kilowatt |
| 2.54927×10-4 | CTR (UK) | ton (refrigeration, UK) |
| 2.84349×10-4 | CTR (US) | ton (refrigeration, US) |
| 1 | VA | volt-ampere |
| 0.99981 | W | watt (int. mean) |
| 0.999835 | W | watt (int. US) |
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