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The Torque Calculator
Stop guessing motor torque. Start calculating it!
Torque Calculator sizes your motor and gearbox in minutes — no more eyeballing datasheets or rebuilding spreadsheets. Enter your load (torque, speed, orientation) and get real torque/inertia numbers, motor & gearbox matches from a live parts catalog ranked by fit, inertia matching, built-in efficiency tables, and one-click PDF export. 5-day free trial, no card. Then $100 lifetime — no subscription. Windows only. Would love feedback from anyone sizing motion systems! 🙏
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. 🙏
About The Torque Calculator on Product Hunt
“Stop guessing motor torque. Start calculating it!”
The Torque Calculator was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #41 on the daily leaderboard. Torque Calculator sizes your motor and gearbox in minutes — no more eyeballing datasheets or rebuilding spreadsheets. Enter your load (torque, speed, orientation) and get real torque/inertia numbers, motor & gearbox matches from a live parts catalog ranked by fit, inertia matching, built-in efficiency tables, and one-click PDF export. 5-day free trial, no card. Then $100 lifetime — no subscription. Windows only. Would love feedback from anyone sizing motion systems! 🙏
On the analytics side, The Torque Calculator competes within Design Tools, Developer Tools and Tech — topics that collectively have 1.4M followers on Product Hunt. The dashboard above tracks how The Torque Calculator performed against the three products that launched closest to it on the same day.
Who hunted The Torque Calculator?
The Torque Calculator was hunted by John Frost. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of The Torque Calculator including community comment highlights and product details, visit the product overview.
John Frost