Gear Ratio Calculator
Calculate gear ratio, output RPM, torque ratio, and speed reduction for gear trains.
What Is the Gear Ratio Calculator?
Use this free online gear ratio calculator for instant, accurate results.
Formula
How to Use
Enter your values in the fields below and the result updates automatically.
Example Calculation
Enter sample values and click Calculate to see a worked example.
Understanding Gear Ratio
Gear Ratio Calculator is a free online tool providing instant, accurate calculations. No signup required.
All calculations run in your browser for maximum privacy and speed.
Bookmark this page for quick access to gear ratio calculator calculations whenever you need them.
Frequently Asked Questions
Is this calculator free?
Yes, completely free with no registration required.
How accurate are the results?
Results use standard mathematical formulas and are accurate to 6 significant figures.
Can I use this on mobile?
Yes, the calculator is fully responsive and works on all devices.