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Torque, or moment, of a force about a particular point is defined as
The calculator below can be used to convert between some common moment or torque units

The Law of Lever is a torque balance on a stationary object and can be expressed as
F1 / F2 = L2 / L1 (1)
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 (1b)
or
T1 = T2 (1c)
where
T = torque or moment (Nm, lbfft)
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