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

Speed Meters Per Second (m/s)

Required number input.

Area Square Meters (m²)

Required number input.

Volumetric flow rate from mean cross-sectional velocity and flow area. 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.

• Sedimentation Overflow Rate

  Surface overflow rate of a clarifier from volumetric flow divided by plan surface area; not a settling performance prediction.

• Extrusion Pressure

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

• Manning Flow Rate

  Open-channel discharge from Manning n, flow area, hydraulic radius and energy slope in SI units.