What is mechanical advantage (MA)?

It is the factor by which a mechanism multiplies the input force, calculated as the ratio of the input arm length to the output arm length.

What does a mechanical advantage of less than 1 mean?

An MA less than 1 means the lever does not amplify force, but instead increases the distance and speed of the output movement.

Is the input force required to run the calculation?

No, the input force is optional. If omitted, the calculator will still compute the mechanical advantage and distance ratio.

What unit of measurement should I use for the arm lengths?

You can use meters (m) or any consistent unit of length, as long as both the input and output arms use the same unit.

How does the calculator determine the lever type?

It classifies the lever as a 'force multiplier' if the mechanical advantage is greater than 1, and a 'distance multiplier' if it is less than 1.

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Lever Mechanical Advantage Calculator

Calculate the mechanical advantage of a lever and its output force. MA = L_in / L_out, and by moment balance F_out = F_in · MA. MA > 1 saves force; MA < 1 saves distance.

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1 examples

L_in=2 m, L_out=0.5 m, F_in=100 N

MA = 2/0.5 = 4 (force multiplier). F_out = 100 × 4 = 400 N.

{"result":"Mechanical advantage MA = L_in/L_out = 2/0.5 = 4 (force multiplier). F_out = F_in·MA = 100·4 = 400 N.","metadata":{"input":{"inputArm":2,"outputArm":0.5,"inputForce":100},"result":{"mechanicalAdvantage":4,"leverType":"force multiplier","outputForce":400,"outputForceUnit":"N","distanceRatio":0.25}}}

Inputs

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4 options

SettingsAdjust formats, ranges, numbers, and modes.4

Input Arm L_in (m)numberRequiredOutput Arm L_out (m)numberRequiredInput Force F_in (N)numberOptionalOptional. If provided, the output force F_out = F_in × MA.Decimal PlacesnumberOptional

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Lever Mechanical Advantage Calculator

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Use cases

Examples

1. Designing a High-Force Crowbar

2. Analyzing a Tweezers Mechanism

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