Torque Calculator
Torque from force and lever arm, with unit conversion.
Enter your values
Enter the force in N.
Enter the lever arm in m.
Enter the angle to lever in °.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Torque
- 100 N·m
- Foot-pounds
- 73.7562
- Inch-pounds
- 885.075
- Kilogram-metres
- 10.1972
Working
- 1τ = 250 × 0.4 × sin(90°) = 100 N·m
Quick answer
Torque is force times the perpendicular lever arm distance; 1 N·m equals 0.7376 ft·lb.
τ = F × r × sin(θ)
At a glance
| What it does | Torque from force and lever arm, with unit conversion. |
|---|---|
| Category | Physics |
| Inputs needed | Force, Lever arm, Angle to lever |
| Main output | Torque |
| Formula | τ = F × r × sin(θ) |
| Cost | Free — no sign-up, no download |
How to use the Torque Calculator
- 1Enter the applied force in newtons.
- 2Enter the lever arm length in metres.
- 3Set the angle — 90° gives maximum torque.
Inputs explained
- Force(N)
- Enter the force in N.
- Lever arm(m)
- Enter the lever arm in m.
- Angle to lever(°)
- Enter the angle to lever in °.
Worked example
Using the values the calculator loads with:
Inputs
- Force250 N
- Lever arm0.4 m
- Angle to lever90 °
Results
- Torque100 N·m
- Foot-pounds73.7562
- Inch-pounds885.075
- Kilogram-metres10.1972
- τ = 250 × 0.4 × sin(90°) = 100 N·m
Frequently asked questions
Why does angle matter?
Only the perpendicular component of force produces torque, so pulling at 30° gives half the torque of pulling square.
How do I convert N·m to ft·lb?
Multiply by 0.7376 — a 100 N·m wheel-nut spec is about 74 ft·lb.
What do I need to enter into the Torque Calculator?
Just 3 values: force, lever arm, angle to lever. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Torque Calculator work out the answer?
Torque is force times the perpendicular lever arm distance; 1 N·m equals 0.7376 ft·lb. It applies the formula τ = F × r × sin(θ) and shows the working so you can check each step by hand.
Is the Torque Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.