Torque Calculator

Torque from force, lever arm, and angle with unit conversions.

Inputs

Force (N)

Lever Arm (m)

Angle (°)

RPM (for power)

Tab to move between fields

Results

Torque (N·m)

15

Power (W)

1,570.8

Torque (lb·ft)11.06

Torque (lb·in)132.76

Torque (kg·cm)152.96

Power (HP)2.11

Angular Velocity (rad/s)104.72

Clamping Force7,500

How to Use This Calculator

Enter applied force (N) and lever arm length (m) from the pivot to the force application point.
Enter the angle (degrees) between the force vector and the lever arm — 90 degrees gives maximum torque.
Enter RPM for power calculation.
Read torque (N·m) and its equivalents in lb·ft, lb·in, and kg·cm.
Review power (W and HP) produced at the given RPM.

How the result changes with Force (N)

Force (N)	Torque (N·m)	Power (W)
100,000,000	30,000,000	3,141,592,653.59
350,000,000	105,000,000	10,995,574,287.56
650,000,000	195,000,000	20,420,352,248.33
900,000,000	270,000,000	28,274,333,882.31

What each input means

Force (N): Applied force in newtons.
Lever Arm (m): Distance from pivot to point of force application.
Angle (°): Angle between force vector and lever arm. 90° = maximum torque.
RPM (for power): Rotational speed for power calculation.

What each result means

Torque (N·m): τ = rF·sin(θ).
Torque (lb·ft): Torque in pound-feet.
Torque (lb·in): Torque in pound-inches.
Torque (kg·cm): Torque in kilogram-centimeters.
Power (W): P = τω. Rotational power in watts.
Power (HP): Rotational power in horsepower.
Angular Velocity (rad/s): ω = RPM × 2π/60.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Force (N) = 50, Lever Arm (m) = 0.3, Angle (°) = 90, RPM (for power) = 1000 = 4 input(s) provided
Calculate Torque
15 = 15
Calculate Power
Power = torque * omegaRadS
1570.8 = 1570.8
Calculate Torque
Torque = torque * 0.7376
11.064 = 11.064
Calculate Torque
Torque = torque * 8.8507
132.761 = 132.761

Engine last updated July 26, 2026.

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