Orifice Outlet Sizing

Calculate detention pond outlet orifice size.

Rate of fluid movement through the system.
cfs
Enter the head on orifice value for this calculation.
ft
A numerical factor used in formulas.

Results

Orifice Area:
Calculated surface area.
-ft²
Orifice Diameter:
Calculated orifice diameter based on your inputs.
-in
Discharge Velocity:
Calculated speed or velocity.
-ft/s
Reference: AWWA/EPA Standards. Orifice equation.