Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Mechanical
Gear Ratio Calculator
Calculate the gear ratio between two meshing gears from their tooth counts. Use it when designing drivetrains, selecting motor reduction gears, or analyzing the speed-versus-torque trade-off in any geared system.
Fill in the required fields to see your result.
Mechanical
Pulley Speed Calculator
Calculates the output shaft speed of a belt-and-pulley system based on pulley diameters and input speed. Use it when designing drive systems to achieve a target RPM ratio between driver and driven shafts.
Fill in the required fields to see your result.
Key differences
| Gear Ratio Calculator | Pulley Speed Calculator | |
|---|---|---|
| Category | Mechanical | Mechanical |
| Inputs required | 2 | 3 |
| Result | Gear Ratio (:1) | Output Speed (rpm) |
| What it does | Calculate the gear ratio between two meshing gears from their tooth counts. Use it when designing drivetrains, selecting motor reduction gears, or analyzing the speed-versus-torque trade-off in any geared system. | Calculates the output shaft speed of a belt-and-pulley system based on pulley diameters and input speed. Use it when designing drive systems to achieve a target RPM ratio between driver and driven shafts. |