Flow Through Orifice Calculator

This tool calculates the flow of incompressible fluid through an orifice in a horizontal pipe.

Type the required values to get the flow through an orifice:

Inlet Pressure (P1, Pa)

Outlet Pressure (P2, Pa)

Pipe Diameter (D1, m)

Orifice Diameter (Do, m)

Discharge Coefficient (Cd) [See the above table for typical values]

Fluid Density (kg/m3)

Discharge Volumetric Flow (m3/s)