Live tool/tool/fan-power-calculator

Fan Power Calculator

Estimate fan horsepower and watts from airflow, static pressure, and efficiency for rough HVAC sizing.

EngineeringHVACPower

Airflow

CFM

Static pressure

in w.c.

Fan efficiency

Fan power

1.09 hp

Electrical load

812 W

Airflow

3,000 CFM

Efficiency used

0.7%

Screening estimate

This is a quick planning formula for fan brake horsepower. Real selections should include the full system pressure path and motor margin.