How to Use Newton Meter Calculator
The Newton Meter Calculator computes torque, force or lever-arm length using τ = F × r, with mixed SI and imperial units.
- Pick the variable to solve for - Torque, force or radius.
- Enter the two known values - Each has its own unit selector.
- Read the result - The Newton Meter Calculator also displays the torque in N·m, lbf·ft and kgf·m for reference.
Formula & Theory - Newton Meter Calculator
τ = F × r
F = τ ÷ r
r = τ ÷ F| Quantity | Supported units |
|---|---|
| Force F | N, kN, kgf, lbf |
| Radius r | m, cm, mm, ft, in |
| Torque τ | N·m, kN·m, kgf·m, lbf·ft, lbf·in |
Assumptions and Limits
The formula τ = F × r assumes the force is perpendicular to the lever arm. For other angles, use τ = F × r × sin θ.
Use Cases for Newton Meter Calculator
- Wrenches - Estimate effort needed to reach a target torque.
- Motors - Find force at the end of an output shaft.
- Bicycles - Crank torque from rider weight × crank length.
- Education - Physics rotational mechanics problems.