Question 1

What exactly is torque?

Accepted Answer

Torque (often represented by the Greek letter tau, τ) is the rotational equivalent of linear force. Just as a linear push or pull causes an object to accelerate in a straight line, torque causes an object to acquire angular acceleration (to start rotating).

Question 2

What is the formula for torque?

Accepted Answer

The formula is τ = r × F × sin(θ). Where 'r' is the length of the lever arm, 'F' is the magnitude of the force applied, and 'θ' is the angle between the force vector and the lever arm. The resulting SI unit is Newton-meters (N·m).

Question 3

Why is the angle important?

Accepted Answer

Torque is maximized when force is applied perfectly perpendicular (at exactly 90 degrees) to the lever arm. If you push parallel to the lever arm (at 0 degrees), you generate zero torque because all your force is pushing directly into the fulcrum, not turning it.

Question 4

What is the difference between Newton-Meters and Foot-Pounds?

Accepted Answer

They measure the exact same physical property (torque), just using different unit systems. Newton-Meters (N·m) is the standard metric SI unit. Foot-pounds (ft-lb) is the imperial British/American standard. 1 Foot-Pound is equal to approximately 1.3558 Newton-Meters.

Question 5

Can I use Inch-Pounds instead?

Accepted Answer

Yes. Inch-pounds (in-lb) are commonly used in mechanical engineering for smaller fasteners. This calculator automatically outputs Inch-pound conversions alongside the primary results for convenience.

Torque Calculator

Applying Max Torque

99.9999ft·lb

Understanding the Variables

Force

Lever Arm

Angle

Frequently Asked Questions

Share With Your Mechanics Team

Related Calculators