Use this engineering calculation for a transparent preliminary estimate or independent arithmetic check when geometry, materials, loads, operating conditions, and units are defined consistently.

Discharge Coefficient

Required number input.

Area Square Meters (m²)

Required number input.

Pressure Difference Pascals (Pa)

Required number input.

Density Kg Per M3 (kg/m³)

Required number input.

Idealized incompressible orifice discharge Q=Cd A√(2Δp/ρ); Cd must be supplied for the actual geometry. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Flow Cubic Meters Per Second (m³/s)

The resulting flow cubic meters per second returned as a number.

• Hydraulic equations require consistent datum, fluid properties, geometry, roughness, flow regime, and loss coefficients. Cavitation, air entrainment, unsteady flow, fittings, sediment, free-surface effects, and pump behavior may require a network or numerical model.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check assumptions against drawings, measurements, current material data, and the applicable design code. Apply required load combinations and safety factors, then obtain qualified review and testing for consequential designs.

• Extrusion Pressure

  Ideal frictionless extrusion pressure from a supplied mean flow stress times ln(initial area/final area); actual die pressure may be higher.

• Venturi Flow Rate

  Incompressible Venturi flow from inlet and throat area, pressure difference and discharge coefficient; requires throat smaller than inlet.

• Weir Flow Rectangular

  Free-flow sharp-crested rectangular weir discharge with user-supplied coefficient: Q=(2/3)Cd b√(2g)h^(3/2); no end-contraction correction.