Flow Rate Through Orifice Calculator ISO 5167 Units
Blocks shown as light blue are editable
Diameter of orifice d = m
 Upstream internal pipe diameter D = m
Coefficient of discharge C = -
Expansibility [expansion] factor ε = -
Differential pressure Δp = Pa
Density of the fluid ρ = kg / m3
Diameter ratio β = -
Calculated Results
Orifice Mass flowrate qm = kg/s