# Volumetric Flow Rate

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Volumetric flow rate, abbreviated as Q, also called flow rate, is the amount of fluid that flows in a given time past a specific point or you could say the actual volume flow.

## Volumetric flow rate formulas

 $$\large{ Q = A_c \; v }$$ $$\large{ Q = A_c \; v \; cos \; \theta }$$ $$\large{ Q = \frac {V} {t} }$$ $$\large{ Q = k \; i \; A_c }$$

### Where:

 Units English SI $$\large{ Q }$$ = volumetric flow rate $$\large{\frac{ft^3}{sec}}$$ $$\large{\frac{m^3}{s}}$$ $$\large{ A_c }$$ = area cross-section $$\large{ft^2}$$ $$\large{m^2}$$ $$\large{ k }$$ = hydraulic conductivity $$\large{\frac{ft}{day}}$$ $$\large{\frac{m}{day}}$$ $$\large{ i }$$ = hydraulic gradient $$\large{dimensionless}$$ $$\large{ t }$$ = time $$\large{sec}$$ $$\large{s}$$ $$\large{ v }$$ = velocity $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$ $$\large{ V }$$ = volume $$\large{in^3}$$ $$\large{mm^3}$$