Orifice Flow Calculator
Weir Flow Calculator
What do you need to calculate?
FLOW
GRATE PERIMETER
Select Grate Type
Catch Basin Inlet
Curb Inlet
TYPE OF GRATES
L = Length | W = Width
Catch Basin Inlets:
Square, Rectangular & Round grates which are
not
positioned against a curb.
Rectangular Grate
Round Grate
Curb Inlets:
Square or Rectangular grates which are positioned against a curb.
Rectangular Grate Against a Curb