Involute Gear Generator & Mesh Visualizer

Enter module, teeth, and pressure angle to generate a standard involute tooth profile and watch two gears mesh at the correct ratio. Nothing leaves your browser.

v1 scope: standard full-depth teeth, no profile shift (addendum modification). Skipping profile shift means low tooth counts below the undercut threshold render the geometrically real but non-standard undercut shape, not a corrected one -- watch for the warning below.

Convention: ISO 54 / DIN 780 / current AGMA metric full-depth (addendum = 1.0×module, dedendum = 1.25×module, whole depth = 2.25×module). Older inch/diametral-pitch references sometimes use a legacy dedendum convention (1.157/Pd) -- that's a different, older standard and out of scope here.
Gear 1
Gear 2

FAQ

Is this really free?

Yes, completely, no limit. The involute math and SVG rendering run entirely in your browser, no AI, no backend call at all.

What's in scope for v1?

Standard full-depth involute gears with no profile shift (addendum modification). That means low tooth counts below the undercut threshold will render the geometrically real but non-standard undercut shape, not a corrected profile, the tool flags this clearly rather than hiding it.

Which tooth proportion convention does this use?

The modern ISO 54 / DIN 780 / current AGMA metric full-depth convention: addendum = 1.0 x module, dedendum = 1.25 x module, whole depth = 2.25 x module. Older inch/diametral-pitch references sometimes use a legacy dedendum convention (1.157/Pd), which is a different, older standard, values here won't match a calculator using that convention.

What are the risks?

This is a visualization and quick-reference aid, not a substitute for a real gear design calculation. Profile shift, backlash, tip relief, and manufacturing tolerances all affect a real gear and aren't modeled here.