PhDino Calc 95 is a free, browser-based toolkit of structural, mechanical, electrical, and geotechnical calculators, paired with a wiki and step-by-step project guides. It's built for students and hobbyists tackling medium-complexity problems — not a replacement for professional engineering tools, but a learning-first companion for understanding *why* the numbers come out the way they do, with live diagrams alongside every calculation.

Hey Product Hunt 👋 I'm Andrea, a mechatronics engineer based in Venice, Italy, and I built PhDino Calc 95 solo, mostly with Claude Code, over 6 months. The idea started simple: as an engineer, I wanted a place where calculations came with a live diagram and an explaination next to them, so you could actually see what a formula was doing instead of just trusting a number came out right. It grew into a small wiki and a set of project guides alongside the calculators themselves. This isn't meant to compete with AutoCAD, SolidWorks and such — it's not a professional engineering suite. It's meant for students, self-learners, and anyone working through a medium-complexity problem who wants a free, approachable tool that helps them understand the problem, not just spit out a number. It's still early — no ads yet (I'm waiting for Google AdSense approval), nothing to sign up for, just the tool. I'd genuinely love feedback: what calculators are missing, what's confusing, what you'd want to see next. There's a feedback form built right into the site if anything comes to mind after you poke around. Thanks for taking a look 🦕 — Andrea