Work and Power Calculator
W = F × d × cosθ or W = m × g × h • P = W ÷ t
Choose how work should be calculated. Power is computed from work and time.
Quick summary
Select a mode, enter the required values, and optionally enter time for power.
Force may be positive or negative.
Displacement may be positive or negative.
If left blank, angle defaults to 0°.
Mass must be 0 or greater.
Height may be positive or negative.
Custom gravity must be greater than 0.
Leave time empty to calculate work only.
Results
Work
— J
Work
— kJ
Work
— Wh
Power
— W
Power
— kW
Power
— hp
Work is always shown. Power is shown only when valid time is entered.
Use this Work and Power Calculator to calculate mechanical work and, when time is entered, average power. It supports constant-force work and vertical lifting work.
Calculation Method
For a constant force:
W = F × d × cos(θ)
For lifting an object vertically:
W = m × g × h
Average power is:
P = W ÷ t
Example
A 60 N force moves an object 5 m at an angle of 30°:
W = 60 × 5 × cos(30°) ≈ 259.8 J
If this work takes 10 seconds:
P = 259.8 ÷ 10 ≈ 25.98 W
Important Note
Only the component of force in the direction of displacement contributes to work. The power result is average power over the entered time. These formulas do not account for variable forces, friction, air resistance, or machine efficiency.