Large and Small Diameter Lifting Pulley Drums Equation and Calculator

Large and Small Diameter Lifting Pulley / Drums Equation and Calculator

Mechanics and Machines Calculations Menu

A simple pulley and drum may be used to lift a weight by applying a force with a rope which is wrapped about he outer diameter of one of the diameters.

Simple Pulley Lift

F : W = r : R		W = (F x R)/r
F x R = W x r		R = (W x r)/F
F = (F x R)/R		r = (F x R)/W

Where:

W = Unknown weight (lbs, N)
F = Applied force (lbs, N)
R = Radius large diameter (in, mm)
r = Radius small diameter (in, mm)

Pulley Lifting Calculator Force
Weight W (Lbs, N) =
Radius r (in, mm) =
Radius R (in, mm) =
Result
Force F (Lbs, N) =

Pulley Lifting Calculator Weight
Force F (Lbs, N) =
Radius r (in, mm) =
Radius R (in, mm) =
Result
Weight W (Lbs, N) =

Pulley Lifting Calculator Radius R
Weight W (Lbs, N) =
Radius r (in, mm) =
Force f (in, mm) =
Result
Radius R (in, mm) =

Pulley Lifting Calculator Radius r
Force F (Lbs, N) =
Radius R (in, mm) =
Weight W (in, mm) =
Result
Radius r (in, mm) =