About the Orifice Flow Calculator Online Free Tool

The Orifice Flow Calculator Online Free Tool estimates discharge through a sharp-edged orifice from discharge coefficient, orifice diameter, and head.

How to Use the Orifice Flow Calculator Online

1. Enter discharge coefficient, orifice diameter, and head above the orifice center.
2. Run the calculation to estimate orifice area and flow rate.
3. Review discharge in m^3/s and m^3/h.
4. Verify coefficient and measurement conditions before using the result for design.

Choosing Options Correctly

Discharge coefficient:
Use a coefficient appropriate for the orifice edge, contraction, and installation. The value must be no more than 1.

Head:
Use head above the orifice center in meters.

Common Use Cases

• Estimate flow through a tank outlet or restriction.
• Compare orifice diameters for approximate discharge.
• Check small hydraulic control openings during planning.

Quick FAQ

What does an orifice calculation estimate?
It estimates discharge through an opening from head, area, and discharge coefficient.

What is discharge coefficient?
It accounts for contraction and losses through the opening. Use a value appropriate for the orifice shape and edge.

Does it handle submerged or two-phase flow?
No. Submergence, cavitation, gas flow, and two-phase flow need different methods.

What is a common mistake?
Using diameter where area is required, or mixing head units with pressure units incorrectly.