Torque Calculator
Calculate torque from force and the length of the lever arm.
Turning force
Torque is the turning effect of a force — how effectively it rotates something around a pivot — and it depends on both the force and how far from the pivot it is applied. This calculates torque from force and lever length, the physics behind wrenches, engines, and anything that turns.
Enter the force and lever length to see the torque.
Why a longer lever helps
The key insight is that torque grows with distance from the pivot, which is why a longer spanner loosens a stubborn bolt that a short one cannot — the same effort applied further out produces more turning force. This is leverage, one of the oldest and most useful ideas in mechanics, and it is why door handles are at the edge of the door, not the middle, and why gears and levers can multiply force.
Torque Calculator FAQ
Why does a longer wrench loosen a tight bolt more easily?
Because torque grows with distance from the pivot, so the same force applied further out produces more turning effect — that is leverage.
What is the difference between force and torque?
Force is a straight push or pull; torque is its turning effect around a pivot, which depends on both the force and the lever length.
Is anything uploaded?
No. The calculation happens in your browser.