Torque Calculator

Torque Calculator

Calculate torque per second. Enter the force value, arm length and optional action angle, and the calculator will give the result inN·m. The tool takes into account classic physical formulas, unit conversions and practical scenarios for mechanics, mechanical engineering, automotive and DIY.

Run the torque calculator See how we calculate

What is the torque of force and why do you calculate it

The torque of force is a physical quantity describing the ability of a force to cause the rotation of a body around a point or axis. In practice, it's exactly what you feel when you tighten a screw with a wrench, lift the trunk lid or lower the press lever. What matters is not only the strength itself, but also the length of the arm and the angle of application. Therefore, two identical pressures can produce completely different rotational effects.

How the torque calculator works

• You enter the forceFin newtons or kilograms of force.
• You enter the length of therarm in meters, centimeters or millimeters.
• Optionally, you specify the angleθbetween the direction of the force and the arm.
• The calculator converts the result into newton metersN·mand can additionally providelbf·ft.
• The result is complemented by interpretation and ready-made application examples.

Formulas and conversion factors used

M = F · r · sin(θ)

If the force is perpendicular to the arm:
M = F r

Example conversion factors:
1 kgf ≈ 9.80665 N
1 cm = 0.01 m
1 mm = 0.001 m
1 lbf ft ≈ 1.35582 N m
1 N·m ≈ 0.73756 lbf·ft

Vectorically, the moment is defined as the vector productM = r × F, whose value is equal to|r| · |F| · sin(θ). In practice, if you press the key exactly perpendicularly, the angle becomes 90°, sosin(θ) = 1and the torque reaches its maximum.

Applications: from workshop to laboratory

Step-by-step instructions

1. Enter the force value. If you have kilograms of force, select the unit kgf and the calculator will convert to newtons.
2. Enter the force arm. We measure in meters from the axis of rotation to the point of ap