Free engineering tools

Tools that do the math, not the marketing.

Free calculators, ready-to-use templates, and a hand-checked library of genuinely free engineering resources. Built for people who make real parts — no fluff, no sign-up walls, no nonsense.

Open the bend calculator Browse the library

The Tools

Live Sheet Metal Bend Calculator Bend allowance, deduction, setback and flat length — with a live diagram that redraws as you change the bend.
Coming soon Tube & Pipe Bend Calculator Cut-length and bend layout for tubular parts.
Coming soon GD&T True-Position Calculator Position tolerance and bonus-tolerance the quick way.
Coming soon Material Weight Calculator Weight by shape and alloy, in metric or imperial.

Resource Library

The Engineering Resource Library

A curated, annotated shortlist of genuinely free and legal engineering material — open courses, reference data, free CAD software, public-domain standards. No pirated PDFs, ever.

Open the library