10 calculators

Fluid Mechanics Calculators

Reynolds number, Bernoulli equation, pipe flow, pumps, open channel flow, and drag

Calculate Reynolds number and classify flow as laminar, transitional, or turbulent with common fluid presets

Solve for any unknown in the Bernoulli equation given pressure, velocity, and elevation at two points

Calculate head loss and pressure drop in pipes using the Darcy-Weisbach equation with friction factor

Calculate Darcy friction factor from Reynolds number and relative roughness using Colebrook-White and Swamee-Jain

Calculate hydraulic power, shaft power, and NPSH for centrifugal pumps from flow rate, head, and efficiency

Calculate volumetric flow rate through an orifice from discharge coefficient, area, and pressure drop

Calculate open-channel flow rate and velocity for rectangular, trapezoidal, and circular cross-sections

Calculate hydraulic diameter (D_h = 4A/P) for rectangular, circular, annular, and custom cross-sections

Calculate aerodynamic drag force and power from drag coefficient, fluid density, frontal area, and velocity

Calculate buoyant force, submerged fraction, and whether an object floats or sinks in various fluids