Work Done Calculator
Calculate mechanical work from force and distance.
Results update as you type.
How it works
Work done is one of the most fundamental ideas in mechanics, describing the energy transferred to or from an object when a force pushes it through a distance. This work done calculator multiplies the force you apply, in newtons, by the distance the object moves, in metres, to return the result in joules. If nothing moves, no work is done no matter how hard you push, which is why holding a heavy box still transfers no mechanical work even though it feels tiring. This quantity matters because work is the bridge between force and energy: it tells you how much energy a machine, a person, or an engine delivers to accomplish a task. Lifting a load, dragging a crate, or compressing a spring all involve work, and calculating it lets engineers size motors, estimate fuel needs, and verify energy budgets. A work done calculator removes the arithmetic so you can focus on the physics. The formula works because energy transfer scales with both the strength of the force and the length of the path over which it acts. Students, teachers, and engineers rely on a work done calculator to solve textbook problems, check designs, and build an intuition for how force and displacement combine to move energy from one place to another.
W = force × distance
Work in physics is the energy transferred when a force moves an object through a distance, so multiplying force by the distance travelled along its direction gives the joules of energy delivered. The formula works because a constant force applied over a longer path does proportionally more work, and a larger force over the same path does proportionally more too. When force and motion are aligned, their simple product captures exactly how much mechanical energy changed hands, which is why work is measured in joules, the same unit as energy.
Source:Standard physics (work-energy principle)
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter force and distance.
- 2
Adjust the options
Fine-tune any options to match your situation.
- 3
Read your result
Work done updates instantly as you type — no button to press.
Frequently asked questions
What units should I use for force and distance?
Enter force in newtons and distance in metres, and the calculator returns work in joules, the SI unit of energy. One joule is the work done by a one-newton force acting over one metre. If your force is in kilonewtons or your distance in centimetres, convert to base units first so the result comes out correctly, since mixing units would scale the joule figure incorrectly.
Why is no work done when nothing moves?
Work requires displacement, so if the distance is zero, the product of force and distance is zero regardless of how large the force is. Holding a weight steady involves plenty of muscular effort but transfers no mechanical work to the object because it does not move. In physics, work specifically measures energy delivered through motion, not the biological effort or strain that a person happens to feel.
Can work done be negative?
Yes. Work is negative when the force acts opposite to the direction of motion, meaning it removes energy from the object rather than adding it. Friction and braking are classic examples: they oppose movement and do negative work, slowing things down. Entering a negative distance or opposing force into the calculator produces a negative result, correctly indicating that energy is being taken away instead of supplied.
How does work relate to energy?
Work and energy share the same unit, the joule, because work is literally the transfer of energy by a force. The work-energy theorem states that the net work done on an object equals its change in kinetic energy. So calculating work tells you how much an object's energy has changed, whether it speeds up, slows down, or gains potential energy by being lifted against gravity.
Does this formula assume force and motion are aligned?
Yes. This simple version assumes the force acts in the same direction as the displacement. When a force is applied at an angle, only the component along the direction of motion does work, so the full formula multiplies by the cosine of the angle between them. For straight pushes and pulls aligned with the movement, that cosine is one and the basic force-times-distance product applies directly.