Water Flow Rate through Piping

Water Flow Rate through Piping formula
$Q_w \;=\; \left( \dfrac{ 3600 }{ 0.134 } \cdot \pi \right) \cdot \left( v_w \cdot \left( \dfrac{ d}{24} \right)^2 \right)$
Symbol	English	Metric
$Q_w$ = Water Flow Rate Through Piping	$ft^3\;/\;sec$	$m^3\;/\;s$
$\pi$ = Pi	$3.141 592 653 ...$	$3.141 592 653 ...$
$v_w$ = Water Velocity Through Piping	$ft\;/\;sec$	$m\;/\;s$
$d$ = Pipe Inside Diameter	$in$	$mm$