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Orifice Flow Rate
Compute Q and mass flow from pressure drop, density, discharge coefficient, and orifice diameter.
visual calculatorInternal Flow & Losses
Read the flow shape before trusting the number.
This page turns a CFD setup into regime, scale, and dominant-effect cues. Adjust the calculator below and compare the moving graphic with the computed result.
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orificeflow ratemass flowpressure drop
formula
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Q = C_d A sqrt(2 Delta p / rho)area (m^2)
0.0007
ideal jet U (m/s)
10.0100
Q (m^3/s)
0.0044
m_dot (kg/s)
4.3781
Use for quick incompressible orifice estimates. Compressible choked gas flow needs the choked mass-flow tool.