A bounded reference for the power, energy, and time units used by the current electricity tools.
Power
From
To
Operation
watts (W)
kilowatts (kW)
divide by 1,000
kilowatts (kW)
watts (W)
multiply by 1,000
Energy
From
To
Operation
watt-hours (Wh)
kilowatt-hours (kWh)
divide by 1,000
kilowatt-hours (kWh)
watt-hours (Wh)
multiply by 1,000
Time
From
To
Operation
minutes
hours
divide by 60
hours
minutes
multiply by 60
days
hours
multiply by 24
Power, time, and energy are a calculation
Energy
kWh = kW × hoursPower multiplied by time.
Average power
kW = kWh ÷ hoursEnergy divided by nonzero time.
Time
hours = kWh ÷ kWEnergy divided by nonzero power.
Watts cannot be converted directly to kWh without time because power and energy are different quantities. Use the watts ↔ kWh calculator when time is part of the question.
Related tools and references
Continue with the source-backed resources that answer the next practical question.