Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Cycling
Bike Gear Ratio Calculator
Calculates gear inches — a measure of how far the bike travels per pedal stroke — from chainring, cassette, and wheel diameter. Useful for comparing gear ratios across drivetrains, planning gear upgrades, and matching cadence to terrain.
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
| Bike Gear Ratio Calculator | Bike Gear Ratio Calculator | |
|---|---|---|
| Category | Cycling | Cycling |
| Inputs required | 3 | 4 |
| Result | Gear Inches (inches) | Speed at Given Cadence (km/h) |
| What it does | Calculates gear inches — a measure of how far the bike travels per pedal stroke — from chainring, cassette, and wheel diameter. Useful for comparing gear ratios across drivetrains, planning gear upgrades, and matching cadence to terrain. | 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. |