# Water Flow Rate through Piping

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

## Water Flow Rate through Piping formula

 $$\large{ Q_w = \left( \frac{ 3600 }{ 0.134 } \; \pi \right) \left( v_w { \left( \frac{d}{24} \right) ^2 } \right) }$$

### Where:

 Units English Metric $$\large{ Q_w }$$ = water flow rate through piping $$\large{\frac{ft^3}{sec}}$$ $$\large{\frac{m^3}{s}}$$ $$\large{ \pi }$$ = Pi $$\large{3.141 592 653 ...}$$ $$\large{ d }$$ = pipe inside diameter $$\large{ in }$$ $$\large{ mm }$$ $$\large{ v_w }$$ = water velocity through piping $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$