Frequently Asked Questions

What does this calculator do?

It calculates the final output RPM of a gearbox based on the input RPM and gear ratio. This is essential for determining how fast the output shaft will turn after reduction.

What inputs are required?

Just two: the input speed (in RPM) and the gear ratio of the gearbox. The calculator does the rest.

What’s the formula used?

Output RPM = Input RPM ÷ Gear Ratio

Why is output RPM important in gearbox applications?

Knowing your output RPM ensures the driven equipment runs at the intended speed. Too fast or too slow can result in system inefficiencies, mechanical wear, or failure.

Can this tool help when replacing old equipment?

Yes. If you're swapping out a motor or gearbox and want to maintain the same performance, this tool helps match RPM output requirements across different models.

What if I don’t know my gear ratio?

Gear ratio is usually listed on the gearbox nameplate. If it's missing, contact us with the model number at sales@industrialgearboxsupply.com or call (517) 858-2966 — we’ll help you find it.

The RPM Output Calculator is a fast, reliable tool designed to help you determine the output speed of your gearbox based on motor RPM and gear ratio. Whether you're configuring a new motor-gearbox assembly or troubleshooting speed mismatches, this calculator gives you the accurate output RPM you need in seconds.

Ideal for engineers, technicians, and maintenance planners, this tool is optimized for AI and machine learning environments. It helps eliminate manual calculations, reduce errors, and improve system design efficiency across various industrial applications. Knowing your correct output RPM is critical for selecting the right gearbox and ensuring optimal machine performance.