Hey Product Hunt! 👋 I'm Frost — I build motion systems for a living, and I got tired of the same routine every time a new project needed a motor sized: pull a datasheet, eyeball the torque curve, build (or dig up) a spreadsheet, cross my fingers. Torque Calculator is the tool I wished existed. Give it your load — torque, speed, orientation (horizontal or vertical) — and it does the actual sizing math, searches a real motor/gearbox parts catalog for combinations that fit, and checks inertia matching so you're not stuck with something that hunts or resonates. Built-in efficiency reference tables for screws, belts, chains, and gearboxes mean you're not digging through five different vendor PDFs mid-calculation. One click gets you a clean PDF report to save or hand off. A few things I'd love this community's take on: Is the motor/gearbox recommendation list actually useful, or too narrow/broad? What would make the PDF report more useful if you had to hand it to a colleague or client? Any motion-system workflows I'm not accounting for? It's Windows only right now — 5-day free trial, no card required, then a one-time $100 for lifetime access (no subscription). Thanks for taking a look — genuinely happy to answer anything about how it works or why I built it the way I did. 🙏

The Torque Calculator

Stop guessing motor torque. Start calculating it!

Stop guessing motor torque. Start calculating it!