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, lbf ft)
F = applied force (N, lbf)
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 Inches
Pound Inches
Pound Feet
Law of Lever
The Law of Lever is a torque balance on a stationary object and can be expressed as
F1 / F2 = L2 / L1 (2)
where
F = force (N, lbf)
L = distance from the point (1 or 2) to the force vector (m, ft)
(1) can be transformed to
F1 L1 = F2 L2 (2b)
or
T1 = T2 (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
F2 = F1 L1 / L2
= (90 kg) (9.81 m/s2) (2 m) / (0.5 m)
= 3531 N