Mechanical Power Calculator
Enter work and time, or force and velocity, to compute mechanical power.
Input Data
Results
At a glance:Mechanical power P is the rate at which work is done or energy is transferred. Average power is P = W/t where W is work and t is time. Instantaneously, for a force F acting on an object moving at velocity v in the force direction, P = F·v. The unit is the watt (W = J/s). Power combines the concepts of force, distance and time, making it central to engines, motors, pumps and human biomechanics.
Formula
Power from work: P = W/t
Power from force: P = F·v
$$P = \frac{W}{t} = F \cdot v$$How to Use
- Enter work W (J) and time t (s), or force F (N) and velocity v (m/s).
- The calculator returns the power P (W).
Case Studies
Lifting a load
W = 980 J (100 kg, 1 m), t = 2 s.
P = 980/2 = 490 W.
A 0.5 kW motor could do this in 2 s.
FAQ
What is the difference between work and power?
Work is energy transferred (J); power is how fast that work is done (J/s = W). Lifting a weight slowly and quickly requires the same work but different power.
Why is P = F·v?
Work W = F·d, so power P = W/t = F·(d/t) = F·v, the force times the speed in its direction.
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References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.