Orifice size calculation for liquid. What is Flow Through an Orifice? Definition: This calculator determines the volumetric flow rate of a fluid through an orifice based on the pressure difference and fluid properties. Our orifice sizing calculator quickly determines the actual flow rate through an orifice plate flow meter using just a few inputs. Accurate, fast results for engineers, students, and technicians. The calculator determines the orifice size required to limit the flow of a liquid to a specified flow rate given the permanent pressure loss across the orifice and the pipe diameter in which the restriction orifice plate is to be installed. Easily calculate orifice flow rate and discharge using our Orifice Calculator. The fluid going through an orifice plate will experience a pressure drop, it is therefore important to be able to size orifice plate correctly to adjust the flow as needed. The orifice flow calculator estimates the flow rate of liquid discharged from a tank through an orifice. This calculator assumes a standard orifice plate with water as the working fluid. Jul 25, 2025 ยท Enter the flow rate and the pressure drop into the calculator to determine the orifice size. In plain and simple terms, the orifice is a hole or a cutout, using which one can control or restrict the flow rate. By measuring the pressure drop caused by the orifice plate in the pipeline, this tool provides precise flow calculations for engineers and technicians. . Orifices are often used in fluid mechanics to limit mechanically the flow. vsrsn jem vxhj cnoyv xrnhxeg ruw bgqb alac slxx wfifpan