Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Automotive
Engine CFM Calculator
Calculate the carburetor or throttle body airflow requirement (in CFM) for an engine based on displacement and maximum RPM. Used by engine builders and performance tuners to select correctly sized carburetors.
Fill in the required fields to see your result.
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.
Key differences
| Engine CFM Calculator | Gear Ratio Calculator | |
|---|---|---|
| Category | Automotive | Automotive |
| Inputs required | 2 | 2 |
| Result | Required CFM (CFM) | Gear Ratio (:1) |
| What it does | Calculate the carburetor or throttle body airflow requirement (in CFM) for an engine based on displacement and maximum RPM. Used by engine builders and performance tuners to select correctly sized carburetors. | 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. |