Lever Force Calculator
Effort, load or arm lengths for all three lever classes.
Archimedes' boast, quantified. A 1.5 m crowbar on a 50 mm fulcrum offset moves 3 tonnes with a 100 kg shove — check the bar's bending stress before trusting it.
Formula
Lever Force Calculator is a free lever calculator for mechanical and machine-design engineers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Lever Force Calculator
Effort, load or arm lengths for all three lever classes. The calculation implements W·d_load = E·d_effort (Statics — moments). Archimedes' boast, quantified. A 1.5 m crowbar on a 50 mm fulcrum offset moves 3 tonnes with a 100 kg shove — check the bar's bending stress before trusting it.
How to use Lever Force Calculator
- 1Enter Load in kg.
- 2Enter Load arm (load→fulcrum) in m.
- 3Enter Effort arm (effort→fulcrum) in m.
- 4Read Effort needed, Mechanical advantage instantly — no submit button needed.
- 5Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Lever Force Calculator?
- ✓Implements the standard formula — W·d_load = E·d_effort
- ✓Reference cited on-page: Statics — moments
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Lever Force Calculator use?+
It computes W·d_load = E·d_effort, per Statics — moments. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Archimedes' boast, quantified. A 1.5 m crowbar on a 50 mm fulcrum offset moves 3 tonnes with a 100 kg shove — check the bar's bending stress before trusting it.
Is this suitable for machine design coursework?+
Yes — these are the exact Shigley/Machinery's-Handbook formulas, with the substitution shown step by step, so you can follow the worked example into your own calculation sheet.
Is the Lever Force Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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