vCalc Reviewed
Equation / Last modified by Administrator on 2017/10/12 07:07

The Torque calculator computes torque as a function of force (F) and perpendicular distance (L).

INSTRUCTIONS: Choose the preferred units and enter the following:

  • (F) This is the force.
  • (L) This is the perpendicular distance.

Torque (τ):  The torque is returned in N•m.  However, this can be converted to compatible units via the pull-down menu.

General Information

The formula for the magnitude of torque (τ), the quantitative measure of the tendency force to cause rotational motion of a body. The inputs are Force (`F`) and the distance (L) between the pivot point and the point where the force is applied.  L is measured by the perpendicular distance from the pivot point, P, to the line of force.

Standard SI units are Force in newtons and r in meters. The units of torque match the units of the input force (`F`) times the units of the distance (l).

Since torque is a measure of force causing a rotation about a specific point, the torque can be both positive (causing counter-clockwise rotation) or negative (causing clockwise rotation).

In the picture, the force, `vecF`, will cause a counter-clockwise rotation about the pivot point, P.   The magnitude of the force will be defined by `tau` = `vecF * L`.