Knudsen Number Calculator
Determine rarefaction effects from molecular mean free path and scale
Fluid Mechanics Calculators
Discover free, easy-to-use Fluid Mechanics in our Physics collection. Find the right calculator, simplify complex calculations, understand your results, and export them for use and citation in project reports and research.
Moisture Content Calculator
Calculate wet-basis and dry-basis moisture from sample masses
Flow Rate Calculator
Calculate pipe area, volumetric flow, and mass flow rates
Drag Equation Calculator
Calculate aerodynamic and fluid resistance forces accurately
Lift Coefficient Calculator
Determine aerodynamic lift coefficient from force, flow, density, and area
Bernoulli Equation Calculator
Solve pressure, velocity head, and energy balance between two points.
Pipe Flow Calculator
Estimate velocity, Reynolds number, friction, losses, and hydraulic power
Pipe Velocity Calculator
Compute pipe flow velocity and area from flow rate, diameter
Friction Factor Calculator
Determine Darcy and Fanning friction factors from pipe conditions
Friction Loss Calculator
Estimate pipe friction, pressure drop, velocity, and flow resistance.
Hydraulic Conductivity Calculator
Calculate hydraulic conductivity from Darcy’s law flow measurements
Froude Number Calculator
Compute dimensionless flow speed relative to gravity wave speed
Hydraulic Gradient Calculator
Compute hydraulic gradient from head difference and flow distance
Hydraulic Jump Calculator
Compute sequent depths, energy loss, velocity, and jump efficiency
Hydraulic Pressure Calculator
Calculate fluid pressure from applied force and surface area
Cv Calculator — Valve Flow Coefficient
Determine valve flow coefficient from flow, pressure drop, and gravity
Hydraulic Radius Calculator
Find flow-section hydraulic radius and equivalent hydraulic diameter quickly
Cv Flow Calculator
Calculate valve flow from Cv, pressure drop, and specific gravity.
Hydrostatic Pressure Calculator
Determine fluid pressure using depth, density, gravity, and surface pressure.
Refrigerant Capillary Tube Calculator
Estimate refrigerant flow, pressure loss, and capillary tube sizing
Pneumatic Cylinder Force Calculator
Calculate pneumatic cylinder push and pull force accurately
Darcy's Law Calculator
Determine porous-media flow rate from conductivity, area, and gradient
Poise-Stokes Converter
Convert dynamic and kinematic viscosity using fluid density accurately
Darcy Weisbach Calculator
Calculate pipe friction losses, pressure drops, and flow characteristics
Poiseuille's Law Calculator
Compute laminar tube flow, velocity, resistance, and shear stress.
Mach Number Calculator
Determine flow speed relative to local speed of sound accurately
Water Density Calculator
Determine water density accurately across temperatures and pressures
Water Pressure at Depth Calculator
Compute hydrostatic gauge and absolute pressure at fluid depth
Water Viscosity Calculator
Estimate water viscosity and related fluid properties from temperature.
Magnus Force Calculator
Estimate sideways force generated by spinning objects moving through fluids
Porosity and Permeability Calculator
Calculate porous material storage and fluid flow properties
Manometer Calculator
Determine pressure difference from fluid density and manometer height
Oblique Shock Calculator
Analyze oblique shock relations, flow changes, and downstream properties
Coefficient of Discharge Calculator
Determine discharge coefficient and efficiency from actual theoretical flow rates
Pounds per Minute Calculator
Calculate mass flow rate from quantity and elapsed time
Reynolds Number Calculator
Determine dimensionless flow behavior using fluid properties and geometry
Open Channel Flow Calculator
Calculate open channel discharge, velocity, depth, and flow regime
Prandtl Meyer Expansion Calculator
Compute supersonic expansion flow angles, Mach number, and property changes.
Prandtl Number Calculator
Find dimensionless Prandtl number from fluid thermal properties
Wind Correction Angle Calculator
Compute wind correction, heading, components, and groundspeed for navigation.
Wind Load Calculator
Estimate wind pressure, force, and overturning moment from key parameters
Orifice Flow Calculator
Calculate orifice flow rate, velocity, area, and mass flow
API Gravity Calculator
Calculate petroleum API gravity from specific gravity accurately
Y+ Calculator
Calculate dimensionless wall distance for computational fluid dynamics
Archimedes' Principle Calculator
Find buoyancy, apparent weight, and floating behavior from fluid data
Broad Crested Weir Calculator
Calculate broad crested weir discharge and specific flow accurately
Differential Pressure Calculator
Find pressure difference between two measured fluid pressures across equipment
Buoyancy Calculator
Determine buoyant force, net force, and apparent weight in fluids.
Fan Calculator
Calculate fan power, torque, speed, and performance coefficients
Stokes' Law Calculator
Calculate viscous drag, terminal velocity, and Reynolds number
