Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Automotive
Horsepower from Torque Calculator
Calculate horsepower from torque (in lb-ft) and engine RPM using the classic HP = (torque Γ RPM) / 5252 formula. Use it to convert between dyno-measured torque curves and the more familiar horsepower figures that car spec sheets quote.
Fill in the required fields to see your result.
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.
Key differences
| Horsepower from Torque Calculator | Engine CFM Calculator | |
|---|---|---|
| Category | Automotive | Automotive |
| Inputs required | 2 | 2 |
| Result | Horsepower (HP) | Required CFM (CFM) |
| What it does | Calculate horsepower from torque (in lb-ft) and engine RPM using the classic HP = (torque Γ RPM) / 5252 formula. Use it to convert between dyno-measured torque curves and the more familiar horsepower figures that car spec sheets quote. | 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. |