ORIFICE PLATE
EQUATIONS USED IN CALCULATION OF flowrate
Large Diameter Orifice Flowmeter Calculation for Liquid Flow
SMALL Diameter Orifice Flowmeter Calculation for Liquid Flow
Large Diameter Orifice Flowmeter Calculation for Gas Flow
Small Bore Orifice Flowmeter Calculation for Gas Flow
A
fluid passing though an orifice constriction will experience a drop in
pressure across the orifice. This change can be used to measure the
flowrate of the fluid.
To calculate the flowrate of a fluid passing through an orifice plate, enter the parameters below. (The default calculation involves air passing through a mediumsized orifice in a 4" pipe, with answers rounded to 3 significant figures.)

Inputs 