This wheel and axle mechanical advantage calculator finds the MA from the wheel radius and the axle radius. Enter both radii above to get the ideal advantage.
Formula
MA = Wheel radius ÷ Axle radius
Example
Wheel radius 30 cm, axle radius 5 cm: MA = 30 ÷ 5 = 6.
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Frequently Asked Questions
How do I calculate wheel and axle mechanical advantage?
Divide the wheel radius by the axle radius. A larger wheel on a small axle gives more advantage.
What are examples of a wheel and axle?
Doorknobs, steering wheels, screwdrivers, and windlasses all use the wheel and axle.
Can the MA be less than 1?
Yes, if effort is applied at the axle to gain speed at the wheel rim instead of force.