# Torque or Moment of Force - Online Converter

## Torque or moment - the tendency of a force to rotate an object

Torque or moment - the tendency of a force to rotate an object around an axis or a point - is defined as

*the product of the force and the distance from the point or axis to the force vector*

Torque can be expressed as

*T = F a (1)*

*where*

*T = moment - or torque of the force (Nm, lb _{f} ft)*

*F = applied force (N, lb _{f})*

*a = moment arm (m, ft)*

### Example - Torque exerted by a Wrench

A force of *250 N* is acting at the end of a *30 cm* long wrench. The torque exerted can be calculated as

*T = (250 N) (30 cm) (0.01 cm/m)*

* = 75 Nm*

### Moment Converter

The calculator below can be used to convert between some common moment or torque units

torque, or moment(use period as decimal point)

Newton Metre

MilliNewton Metre

Kilogram Metre

Kilogram Centimetre

Gram Centimetre

Ounce Inces

Pound Inches

Pound Feet

### Law of Lever

The Law of Lever is a torque balance on a stationary object and can be expressed as

F_{1}/ F_{2}= L_{2}/ L_{1}(2)

where

F = force (N, lb_{f})

L = distance from the point (1 or 2) to the force vector (m, ft)

(1) can be transformed to

F_{1}L_{1}= F_{2}L_{2}(2b)

or

T_{1}= T_{2}(2c)

#### Example - Lever

A person with a mass of *90 kg* is standing on one side of a lever *2 m* from the balance point. The force on the other side of lever *0.5 m* from the balance point can be calculated by modifying (2) to

*F _{2} = F_{1} L_{1} / L_{2 }*

* = (90 kg) (9.81 m/s ^{2}) (2 m) / (0.5 m)*

* = 3531 N*