Lever Calculator
Output force and mechanical advantage of a lever from the two arm lengths.
Results
Force
750.00
N
Ratio
3.7500
What this tool does
A lever multiplies force in exact proportion to the arm lengths, trading distance for effort: a three-to-one advantage means moving your end three times as far. Friction and the weight of the lever itself are ignored.
Formula
F₁ × d₁ = F₂ × d₂
Variables
| Symbol | Meaning | Unit |
|---|---|---|
f1 | Force | N |
d1 | Distance | m |
d2 | Distance | m |
F2 | Force | N |
ma | Ratio | — |
Worked example
- Force200 N
- Distance1.5 m
- Distance0.4 m
- Force750.00 N
- Ratio3.7500
Limitations
- The formula assumes ideal conditions: no friction losses, no air resistance and no efficiency losses unless you enter them.