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

Loss Coefficient

Required number input.

Speed Meters Per Second (m/s)

Required number input.

Gravity Meters Per Second Squared (m/s²)

Required number input.

Local fluid head loss K v²/(2g) using a supplied dimensionless loss coefficient. 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]

Head Loss Meters (m)

The resulting head loss meters 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.

• Plate Buckling Critical Stress

  Classical elastic plate local buckling stress kπ²E/[12(1−ν²)](t/b)² for a supplied boundary-condition coefficient.

• 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.

• Convective Heat Transfer

  Newton-law convection heat-transfer rate hAΔT with a supplied convection coefficient at the stated flow condition.