Levers

A lever is a mechanism that can be used to exert a large force over a small distance at one end of the lever by exerting a small force over a greater distance at the other end. This calculator computes lever effort force and related parameters.

Calculator

Inputs

Load Force (N or lb)

Distance from Load to Fulcrum (m or ft)

Distance from Effort to Fulcrum (m or ft)

Results

Effort Force Required-- N or lb

Mechanical Advantage--

Lever Type	Load Force	Load Distance	Effort Distance	Effort Force	Mechanical Advantage
First-Class	1 lb	1 ft	2 ft	0.5 lb	2.0
Second-Class	1 lb	1 ft	2 ft	0.5 lb	2.0
Third-Class	1 lb	2 ft	1 ft	2 lb	0.5
Car Lift Example	9810 N	0.2 m	2 m	981 N	10.0
SI Units Example	9.81 N	1 m	2 m	4.905 N	2.0
Multiple Loads	14 lb	2 ft	2 ft	7 lb	1.0