Power Calculator
Estimate Power by entering power ratings and usage hours. Get daily, monthly, and annual energy figures alongside cost and emissions estimates. Free tool.
Formula
P = W / t
Power equals Work divided by Time.
Worked Examples
Example 1: Lifting a Weight
Problem:100 Joules of work in 5 seconds
Solution:100 / 5
Result:20 Watts
Frequently Asked Questions
What is the formula for Power?
P = W / t, where P is power, W is work, and t is time.
What is the unit of Power?
The standard unit is the Watt (W). 1 Watt = 1 Joule per second.
How relates power to velocity?
Power can also be calculated as Force × Velocity (P = Fv) for constant forces.
What is electrical power?
In circuits, Power = Voltage × Current (P = VI).