Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Automotive
Gear Ratio Calculator
Calculate the gear ratio between two meshing gears using their tooth counts. Useful for designing drivetrains, bicycles, RC vehicles, and any mechanical power-transmission system.
Fill in the required fields to see your result.
Automotive
RPM to Speed Calculator
Convert engine RPM into real vehicle speed in miles per hour using tire size and final drive ratio. Ideal for gear tuning, speedometer calibration, and performance analysis.
Fill in the required fields to see your result.
Key differences
| Gear Ratio Calculator | RPM to Speed Calculator | |
|---|---|---|
| Category | Automotive | Automotive |
| Inputs required | 2 | 3 |
| Result | Gear Ratio (:1) | Vehicle Speed (MPH) |
| What it does | Calculate the gear ratio between two meshing gears using their tooth counts. Useful for designing drivetrains, bicycles, RC vehicles, and any mechanical power-transmission system. | Convert engine RPM into real vehicle speed in miles per hour using tire size and final drive ratio. Ideal for gear tuning, speedometer calibration, and performance analysis. |