Precision Tools for
Real Engineering
Calculators, unit converters, and GD&T references — built for working mechanical engineers. Accurate, fast, and completely free.
Everything a Mechanical Engineer Needs
From instant unit conversions to full structural analysis — get the job done without switching between 10 different websites.
Engineering Calculators
Stress analysis, beam bending, chassis design, bearing loads, fatigue crack growth, bolted joints, fluid pressure, Hertz contact — built on verified engineering formulas.
Explore CalculatorsUnit Converters
Length, force, stress, torque, pressure, temperature, area, volume, density, angular velocity — convert between SI, Imperial, and metric systems instantly.
Use ConvertersGD&T Resources
Complete ASME Y14.5 symbol library, datum callouts, surface finish tables, fit & tolerance references — a practical guide for designers and inspectors.
Explore GD&TProfessional Tools, Built for the Job
Validated against standard references — Shigley’s, Roark’s, ASME, and ISO. Designed for daily engineering use, not just theory.
Unit Converters
Built by Engineers, for Engineers
We built the tools we wished we had on real projects. No fluff, no subscriptions — just reliable engineering calculations.
Verified Formulas
Every calculation uses established standards — Roark’s, Shigley’s, ASME, and ISO. No guesswork.
Live, Instant Results
Results update as you type. No submit buttons or page reloads — designed for fast iteration.
Engineer-Tested
Developed and cross-checked by professional mechanical engineers with hands-on design experience.
Works Everywhere
Fully responsive — desktop, tablet, or mobile. Use it at your desk or on the shop floor.
Completely Free
No subscriptions, no paywalls, no sign-up. Open the page and start calculating immediately.
All in One Hub
Calculators, converters, and GD&T in one place — no more jumping between multiple websites.
Ready to Solve Your Next Problem?
Jump straight in — no account, no setup, no waiting. Just engineering.
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