- This calculator allows you to determine how much flow you can get through an orifice given a known pressure drop. You are required to select an orifice constant based on the geometry of your orifice.
- Go to the link below to find the flow constant for your orifice type: http://www.mcnallyinstitute.com/13-html/13-12.htm

- This calculation is only valid for fluids with viscosity similar to water,
- If you are making calculations for a liquid other than water you will have to factor in the viscosity of that liquid compared to water.