Mechanical Advantage Calculator

Calculate how many times a machine multiplies the applied force

MA = L ÷ Eno unit

What is MA?

A dimensionless ratio showing how much a machine multiplies the input force. Higher MA = less effort needed.

Machine Types

Levers, pulleys, inclined planes, wedges, screws, and wheel-and-axle all have calculable MA values.

Force vs Speed

Machines with high MA multiply force but the effort moves farther. Energy is always conserved.

Formula

Mechanical Advantage of a machine

MA = Load ÷ Effort

MA has no unit — it is a pure ratio

LLoad ForceN
EEffort ForceN
MAMech. Advantage—

Enter Values

The resistance force the machine must overcome (weight of the object being moved)

N

The force you apply to the machine to move the load

N

MA greater than 1 means the machine multiplies force. MA less than 1 means you apply more force than the load — but the load moves faster or farther.

No result yet

Enter the load and effort force values on the left, then press Calculate MA to see the mechanical advantage ratio and force comparison chart.

MA Interpretation Guide

Understanding what the ratio means

MA > 1

Force Multiplier

Machine multiplies effort force. Less effort needed to move larger load.

Examples: Wheelbarrow, nutcracker, bottle opener

MA = 1

Direction Changer

Machine only changes direction of force. No force multiplication.

Examples: Single fixed pulley, equal-arm balance

MA < 1

Speed/Distance Multiplier

More effort than load, but load moves faster or farther.

Examples: Tweezers, fishing rod, human forearm

Example Problems

Class 1 Lever

Force Multiplier
Load400 N
Effort100 N
MA4.00

Block & Tackle

Force Multiplier
Load600 N
Effort150 N
MA4.00

Tweezers

Speed Multiplier
Load10 N
Effort25 N
MA0.40

Fixed Pulley

Direction Only
Load200 N
Effort200 N
MA1.00