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! 🙏