Orifice Sizing Calculator

Flow Rate:
Co-efficient:

Result: (Enter any one of below values and calculate)

Head Drop:
Orifice Diameter:

Orifice sizing is crucial for determining the correct size of an orifice to control the flow rate of a fluid through a pipe. It is used in various applications, such as pressure relief valves, flow meters, and fluid flow control devices.

The general formula for orifice flow is derived from the Orifice Flow Equation:

Where:

  • Q= Flow rate (m³/s or GPM)
  • C = Discharge coefficient (dimensionless), typically ranging from 0.6 to 0.9 depending on the orifice design
  • A = Area of the orifice (m² or ft²)
  • g= Acceleration due to gravity (9.81 m/s²)
  • H= Head (pressure difference) across the orifice (m or ft)