Engineering Fluid Mechanics

Acoustic Flow Meter Calculator

Calculate fluid velocity using acoustic flow meter transit-time method. Free online ultrasonic flow meter calculator for pipes, ducts, and channels.

Aluminum Pipe Pressure Calculator

Calculate the pressure rating of aluminum pipe using Barlow formula. Solve for pressure rating, allowable stress, wall thickness, or outside diameter.

Bernoulli Equation Calculator

Calculate pressure velocity elevation and head loss in fluid flow using Bernoulli equation

Atmospheric Dispersion Calculator

Calculate pollutant concentration using Gaussian plume model, effective stack height, wind speed at elevation, and plume rise for environmental air quality analysis.

Biochemical Oxygen Demand Calculator

Calculate biochemical oxygen demand (BOD) using first-order kinetics, unseeded, and seeded BOD equations. Free online BOD calculator for wastewater treatment and water quality analysis.

Buried Corrugated Pipe Calculator

Calculate design pressure and wall thrust for buried corrugated metal pipes. Combines soil pressure, wheel loading, and vacuum pressure per NRCS guidelines.

Buried Plastic Pipe Calculator

Calculate design pressure, wall thrust, and required wall area for buried plastic pipes (HDPE, PVC) using soil, wheel, and vacuum load components.

Buried Spiral Rib Pipe Calculator

Calculate design pressure and wall thrust for buried spiral rib metal pipes. Combines soil pressure, wheel loading, and vacuum pressure for structural design.

Cavitation Number Calculator

Calculate the cavitation number for fluid flow. Solve for cavitation number, local pressure, vapor pressure, fluid density, or flow velocity using the formula σ = 2(p-pᵥ)/(ρV²).

Chezy Equation Calculator

Calculate open channel flow velocity using the Chezy equation. Solve for velocity, Chezy coefficient, hydraulic radius, or channel slope with v = C√(RhS).

Colebrook Equation Calculator

Calculate the Darcy friction factor for turbulent pipe flow using the Colebrook-White equation.

Continuity Equation Calculator

Calculate volumetric flow rate, cross-sectional area, and flow velocity using the continuity equation Q = A × v for incompressible fluid flow in pipes and ducts.

Cyclone Separator Calculator

Calculate cyclone separator performance including effective turns, cut diameter, radial velocity, pressure drop, and separation factor for industrial air pollution control.

Darcy Weisbach Equation Calculator

Calculate pipe friction head loss using the Darcy-Weisbach equation. Solve for head loss, flow velocity, pipe diameter, length, or friction factor in closed conduit flow.

Darcy's Law Calculator

Calculate groundwater flow using Darcy's Law. Solve for flow rate, hydraulic conductivity, hydraulic gradient, or cross-sectional area in porous media.

Ductile Iron Pipe Calculator

Calculate ductile iron pipe wall thickness, internal pressure, and design parameters using AWWA C150 hoop-stress equations. Free online engineering calculator.

Electrodialysis Calculator

Calculate electrodialysis stack current using Faraday law. Solve for current, flow rate, cell count, and efficiency.

Electrostatic Precipitator Calculator

Calculate ESP collection efficiency using Deutsch-Anderson equation. Solve for efficiency, drift velocity, area, or gas flow rate.

Fluid Pressure Calculator

Calculate fluid pressure at any depth using P = ρgh. Free online hydrostatic pressure calculator with multiple fluid types and unit conversions.

Fourier Number Calculator

Calculate the Fourier number for transient heat conduction analysis. Free online Fourier number calculator with solve for Fo, time, length, or thermal diffusivity.

Hazen Williams Calculator

Calculate water pipe flow using the Hazen-Williams equation. Solve for velocity, flow rate, pipe diameter, roughness coefficient, or hydraulic slope.

Hydraulic Radius Calculator

Calculate hydraulic radius for open channels and pipes using Rh = A/Pw with Froude number, mean depth, and flow classification for fluid mechanics analysis.

Ideal Reactor Calculator

Calculate mean residence time, CSTR step input response, and CSTR pulse input response for ideal continuously stirred tank reactors in chemical and environmental engineering.

Knudsen Number Calculator

Calculate Knudsen number (Kn = λ/L) for gas flow regime determination. Solve for mean free path or characteristic length with instant results.

Lewis Number Calculator

Calculate Lewis number (Le = α/D) for simultaneous heat and mass transfer analysis. Solve for thermal diffusivity or mass diffusivity.

Mach Number Calculator

Calculate the Mach number from velocity and speed of sound. Solve for velocity or speed of sound. Free online Mach number calculator for aerodynamics and aerospace.

Manning Equation Calculator

Calculate open-channel flow velocity using Manning equation. Solve for flow velocity, roughness coefficient, hydraulic radius, or slope. Free online Manning calculator for hydraulic engineering.

CT Disinfection Calculator

Calculate disinfectant concentration, contact time, dilution coefficient, or CT constant for water treatment pathogens.

Monod Kinetics Calculator

Calculate specific growth rate, substrate concentration, or half-saturation constant using Monod kinetics.

Minor Losses Calculator

Calculate piping system minor head losses, loss coefficients, or velocity for various fittings and valves.

Mixing Design Calculator

Calculate mixing power for static, laminar, turbulent, and pneumatic mixers, and determine impeller Reynolds numbers.

Nusselt Number

Solve for Nusselt number, convection coefficient, length, or thermal conductivity using Nu = hL/k. Convective vs conductive heat transfer.

Oil Recovery Calculator

Calculate the oil recovery factor (ORF) or solve for estimated recoverable oil (ERO) and estimated initial petroleum in place (EIPO) with our online engineering calculator.

Orifice Flow Calculator

Solve for orifice flow rate, discharge coefficient, area, or head. Supports unit conversions.

Parshall Flume Calculator

Determine flow rate, throat width, or upstream depth for Parshall flume open channel flow measurement with automatic unit conversions.

Peclet Number Calculator

Calculate the dimensionless Peclet number for advective and diffusive transport in fluid flows.

Permeameter Calculator

Calculate soil permeability using Darcy law with constant-head permeameter measurements. Solve for hydraulic conductivity, flow rate, area, sample length, or head difference.

Pipe Flow Calculator

Calculate pipe flow Reynolds number and volumetric flow rate. Solve for Re, velocity, diameter, flow rate, or fluid properties for laminar and turbulent flow analysis.

Pipe Hydrostatic Calculator

Calculate external hydrostatic pressure on buried pipes from groundwater. Solve for pressure, water unit weight, or height of water above pipe crown.

Pipe Soil Pressure Calculator

Calculate vertical soil pressure on buried pipes, buoyancy factor for groundwater, and soil load per linear foot using the Marston-Spangler earth pressure method.

Pipe Vacuum Calculator

Calculate vacuum line load on pipe walls using the vacuum load formula Wv = Pv × Di / 12. Solve for vacuum load, vacuum pressure, or inside diameter.

Pipe Wheel Loading Calculator

Calculate wheel load on buried pipes using the Merritt empirical equations for shallow and deep cover regimes.

Plastic Pipe Pressure Class Calculator

Calculate pressure class for plastic pipes using AWWA C900 standards. Solve for PC using HDS, SDR, and SIDR dimension ratios.

Prandtl Number Calculator

Calculate the Prandtl number (Pr), kinematic viscosity, or thermal diffusivity online. Free Prandtl number calculator for fluid mechanics and heat transfer analysis.

Pump Calculator

Calculate pump water horsepower, brake horsepower, efficiency, and NPSH online. Free pump power calculator for engineers.

Schmidt Number Calculator

Calculate the Schmidt number (Sc = ν/D) comparing momentum diffusivity to mass diffusivity. Solve for Schmidt number, kinematic viscosity, or mass diffusivity.

Sherwood Number Calculator

Calculate the Sherwood number (Sh = kL/D) for convective mass transfer analysis. Solve for Sherwood number, mass transfer coefficient, length, or diffusivity.

Reverse Osmosis Calculator

Calculate osmotic pressure using the Van't Hoff equation and membrane rejection rate for RO system design. Free online reverse osmosis calculator.

Reynolds Number Calculator

Calculate Reynolds number for pipe flow and fluid mechanics. Determine if flow is laminar or turbulent with our free online Reynolds number calculator.

Steel Pipe Pressure Calculator

Calculate steel pipe internal pressure, allowable stress, wall thickness, or outside diameter using Barlow's formula.

Stokes Law Calculator

Calculate Stokes law drag force and terminal settling velocity for spheres in viscous fluids. Free online Stokes law calculator for physics and engineering.

Threshold Odor Number Calculator

Calculate Threshold Odor Number TON for water quality testing. Free online TON calculator with dilution ratios and EPA drinking water standards.

Liters Per Minute Calculator

Calculate liters per minute flow rate from volume and time or from pipe cross-section and velocity with unit conversions.

PSI to GPM Calculator

Calculate water flow rate in GPM from tank and exit pressure using pipe diameter and Bernoulli equation.

Volumetric Flow Rate Converter

Convert volumetric flow rate between cubic meters per second, liters per minute, gallons per minute, and more.