Work, energy & power calculator

How to use (3 steps)

Enter force, displacement, and the angle between the force and the direction of motion (θ defaults to 0° if left blank; time is optional for power).
Add mass, speeds, heights, and gravity to compare kinetic and potential energy changes—recommended to see the full energy balance.
Press Compute to see work, power, ΔK/ΔU/ΔE, and steps. Copy URL shares this setup.

Default example: F = 100 N, s = 5 m, θ = 0°, m = 10 kg, v₁ = 0 m/s, v₂ = 3 m/s, h₁ = 0 m, h₂ = 0 m, g = 9.8 m/s², t = 4 s.

Work (force × displacement)

Force F N

Displacement s m

Angle θ deg

Energy (optional)

Mass m kg

Initial speed v1 m/s

Final speed v2 m/s

Initial height h1 m

Final height h2 m

Gravity g m/s²

Time / Power (optional)

Time t s

Values update when you press Compute or Reset.

What is the difference between work and energy?

Work is the amount of energy transferred by a force acting through a displacement, while energy describes the state of a system. Both use joules.

What does power represent?

Power is the rate of doing work. The same work done in less time means higher power. Its unit is the watt (J/s).

How does this relate to energy conservation?

In an ideal system, work equals the change in mechanical energy. Differences hint at losses such as friction or other energy inputs.

Feedback is welcome. Comments load only after you click.