Free online Pulley Ratio Calculator to compute the ratio and output speed for belt or chain drive systems. Supports metric (mm, teeth) and imperial (inches, teeth) units, with standard, step-by-step, …

Pulleys - Speed vs. Pulley Diameters ... Single Belt Transmission - one driving pulley and one driven pulley For a system with two shafts and two pulleys - as indicated with pulley 1 and 2 in the figure …

Explanation: The ratio is determined by dividing the driven pulley diameter by the drive pulley diameter. The output RPM is then calculated by dividing the input RPM by this ratio.

Find the ratio of a belt drive or a pulley drive with this Belt and Pulley Ratio Calculator.

Feb 10, 2026 · Learn what pulley ratio means, how to calculate it by diameter, teeth, or RPM, and how it changes speed and torque in real systems.

This calculator is used when working on belt-driven systems like air compressors, fans, pumps, and other industrial machinery to estimate motor or compressor speed (RPM), or to size pulleys for …

Calculate pulley ratios and speeds easily with our online pulley ratio calculator. Input driving and driven pulley diameters and speeds to determine pulley ratios and output speeds for your …

Understanding the relationship between pulleys in a system is essential for engineers, mechanics, and hobbyists alike. To make this process easier, our Pulley Ratio Calculator offers a quick, accurate, …

Pulleys are used to transfer power and change speed between rotating shafts. This calculator helps determine the speed ratio between pulleys and calculate the output speed of a driven pulley based …

Jun 12, 2024 · This pulley ratio calculator helps you determine the ratio between the diameters of two pulleys.