W SI derived
Measures: Power — how fast energy flows
Watt
How fast energy flows — one joule every second.
PowerHow it's defined
Defined as J/s. A rate, not an amount: a 60 W bulb spends 60 joules every second it is on. Confusing watts with watt-hours is the classic unit error.
1 W = 1 J/s — exact1 kW = 1,000 W — exact
Convert — honestly
This unit has no convertible siblings on the map yet.
Where you meet it
- Chargers, bulbs, microwaves, solar panels
- Energii-to-be — power draw over time
Other ways to measure power
On this map, it stands alone for its quantity.
Source
This page is an authored summary of the authoritative definition — checkable one click away.
BIPM — The International System of Units (SI Brochure, 9th ed.)