Pulley Gear Ratio Calculator

Pulley Gear Ratio Calculator is an offline utility for checking pulley ratio, gear ratio, and output RPM quickly on Android. Enter the driver value, driven value, and input RPM to get clear results for maintenance work, workshop tasks, technical study, and hobby projects.

This app focuses on fast calculation and simple input instead of complex engineering features. It can be used on the shop floor, in the field, or in class without opening a browser, making it useful for mechanics, technicians, engineers, students, makers, and other users who need quick ratio and RPM checks.

Key features

- Calculate results in pulley mode using driver diameter, driven diameter, and input RPM

- Calculate results in gear mode using driver teeth, driven teeth, and input RPM

- View ratio and output RPM clearly after each calculation

- Support metric and inch units in pulley mode

- Reset values quickly for repeated checks

- Validate inputs for more reliable use

- Switch between English and Korean

- Use the app offline

Pulley Gear Ratio Calculator is designed to stay simple, fast, and easy to use. If you need a convenient way to check ratio and RPM values during setup, repair, maintenance, or study, this app provides a straightforward mobile solution.