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Torque or Moment of Force - Online Converter

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

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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 Inces
Pound Inches
Pound Feet


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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

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Topics

Unit Converters

Temperature

oC
oF


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Length

m
km
in
ft
yards
miles
naut miles


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Area

m2
km2
in2
ft2
miles2
acres


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Volume

m3
liters
in3
ft3
us gal


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Weight

kgf
N
lbf


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Velocity

m/s
km/h
ft/min
ft/s
mph
knots


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Pressure

Pa (N/m2)
bar
mm H2O
kg/cm2
psi
inches H2O


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Flow

m3/s
m3/h
US gpm
cfm


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