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.
Cycling
Bike Gear Ratio Calculator
Find your bike's speed at any cadence by calculating the gear ratio from chainring and cassette teeth counts, wheel size, and pedaling rate. Essential for optimizing gearing before a climb or time trial.
Fill in the required fields to see your result.
Key differences
| Gear Ratio Calculator | Bike Gear Ratio Calculator | |
|---|---|---|
| Category | Mechanical | Cycling |
| Inputs required | 2 | 4 |
| Result | Gear Ratio (:1) | Speed at Given Cadence (km/h) |
| 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. | Find your bike's speed at any cadence by calculating the gear ratio from chainring and cassette teeth counts, wheel size, and pedaling rate. Essential for optimizing gearing before a climb or time trial. |