Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Watts are units used to measure power, which is the rate at which work is done or energy is transferred. It indicates how quickly electrical energy is converted into other forms such as heat or light.
Related terms
Joules (J): A unit used to measure energy.
Kilowatts (kW): A larger unit of power equal to 1000 watts.
Efficiency: The ratio of useful output energy or work to the input energy or work.