# Air Flow Rate through Piping

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

### Air Flow Rate through Piping formula

$$\large{ Q_a = 60 \; \pi \; v_a \; { \left( \frac {d}{24} \right) ^2 } }$$

Where:

$$\large{ Q_a }$$ = air flow rate

$$\large{ v_a }$$ = air velocity

$$\large{ \pi }$$ = Pi

$$\large{ d }$$ = pipe inside diameter