Enter the effort force and lever force into the calculator to determine the force at the fulcrum of a lever at equilibrium.

Fulcrum Force Formula

The following equation is used to calculate the Fulcrum Force.

FF = EF + LF

  • Where FF is the fulcrum force (N)
  • EF is the effort force (N)
  • LF is the lever force (N)

To calculate the fulcrum force, sum together the effort force and the lever force.

What is a Fulcrum Force?


A fulcrum force is the total force seen at the fulcrum of a lever/beam when the beam is at equilibrium. This means that the moment about the fulcrum equals 0, even though the weights and forces on either side may not be equal.

How to Calculate Fulcrum Force?

Example Problem:

The following example outlines the steps and information needed to calculate the Fulcrum Force.

First, determine the lever force. Multiply the mass of the object by gravity yields an effort force of 50 N.

Next, determine the lever force. Knowing the effort force and distances, the lever force is calculated to be 150N.

Finally, calculate the fulcrum force using the formula above:

FF = EF + LF

FF = 50 + 150

FF = 200 N