SMALL TOOLS. PRECISE CALCULATIONS.

Pulley Speed Calculator

Practical calculators for motors and machinery.
Built for your workbench, and your phone.

Free to useNo installationEnglish / 한국어

TOOLS 01—04

Calculate driven pulley RPM using pulley diameters and driver speed.

YOUR RESULT

Formula & how it works

These tools provide basic calculations under ideal conditions. Check manufacturer specifications and losses when applying results.

How to use

Enter driver speed and both effective pulley diameters in the same unit.

1,500 RPM × 4 inch ÷ 8 inch = 750 RPM. The same ratio applies to 100 mm and 200 mm.

Belt slip is excluded. Use pitch diameters rather than outside diameters where available.

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