How to use the torque calculator
Compute torque from force, lever arm and angle. Enter force, lever arm, angle in the fields above; the torque are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “wrench torque”, “turning force”, “how hard to turn a bolt”, “calculate torque”, “find torque”.
Formula
Variables
- F — Force (N)
- r — Lever arm (m)
- ang — Angle (°)
Worked example
With force = 100 N, lever arm = 0.3 m, angle = 90 °, the calculator gives torque ≈ 30 N·m; torque ≈ 22.12686 lb·ft.
Frequently asked questions
What is the torque calculator used for?
Compute torque from force, lever arm and angle. It helps with questions such as “wrench torque”, “turning force”, “how hard to turn a bolt”.
What is the formula for the torque calculation?
Torque (N·m) = F × r × sin(ang). Torque (lb·ft) = [Torque] × 0.7375621. Here F is force (N), r is lever arm (m), ang is angle (°).
What inputs do I need for the torque calculator?
You need force in N, lever arm in m, angle in °. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the torque calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the torque result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.