fluid mechanics Calculators
Reynolds Number Calculator
Determine whether fluid flow in a pipe is laminar, transitional, or turbulent. Engineers and students use this when designing piping systems, heat exchangers, or analyzing fluid dynamics experiments.
Darcy-Weisbach Pressure Loss Calculator
Calculate the pressure drop due to friction as fluid flows through a pipe using the Darcy-Weisbach equation. Used by engineers to size pumps, select pipe diameters, and evaluate energy losses in piping networks.
Bernoulli's Equation Calculator
Apply Bernoulli's principle to find the total mechanical energy per unit volume at a point in a flowing fluid. Used in aerodynamics, pipe flow analysis, and hydraulic engineering to relate pressure, velocity, and elevation.
Manning's Roughness Flow Calculator
Compute open-channel or pipe flow velocity using Manning's equation, given channel geometry and roughness. Commonly used by civil and hydraulic engineers to design drainage systems, culverts, and natural channels.
Hazen-Williams Flow Calculator
Estimate water flow rate in a pipe using the empirical Hazen-Williams formula with pipe diameter, hydraulic gradient, and roughness coefficient. Ideal for water supply and distribution system design.
Venturi Meter Flow Calculator
Determine the volumetric flow rate of a fluid passing through a venturi meter. Use this when designing pipelines or calibrating flow measurement devices in industrial systems.
Orifice Flow Rate Calculator
Compute the volumetric flow rate of a liquid discharging through a circular orifice under a given hydraulic head. Ideal for hydraulic engineers sizing outlet structures, tanks, and culverts.
Pump Power Calculator
Calculate the shaft power a pump must deliver to move fluid through a system against a given total head. Use this to size pump motors or estimate energy consumption in HVAC, water supply, and process engineering.
Pipe Flow Velocity Calculator
Find the average velocity of fluid flowing inside a circular pipe from the volumetric flow rate and pipe diameter. Essential for checking whether flow falls within recommended velocity limits to avoid erosion or excessive head loss.
Hydrostatic Pressure Calculator
Calculate the absolute pressure at any depth in a stationary fluid, accounting for atmospheric pressure at the surface. Used in dam design, submarine engineering, and underwater equipment ratings.
Pipe Friction Loss Calculator
Estimate the pressure head lost to friction in any pipe system using the Darcy-Weisbach equation. Use it when designing water supply lines, irrigation networks, or HVAC piping to ensure adequate flow pressure.
Tank Drain Time Calculator
Calculate how long it takes to drain a tank from one liquid level to another through a bottom orifice. Ideal for sizing drain valves, planning tank cleanouts, or verifying emergency drainage rates.
Pipe Sizing Calculator
Find the minimum required pipe diameter to keep fluid velocity within safe limits for a given flow rate. Use this when selecting pipe sizes for new installations or checking whether existing pipes can handle increased flow.
Weir Flow Calculator
Calculate the volumetric flow rate of water passing over a weir based on weir width, upstream head, and weir type. Used by civil engineers and hydrologists to measure or control open-channel flow in rivers, canals, and water treatment plants.
Pump Affinity Laws Calculator
Predict how a centrifugal pump's flow rate, head, and power change when its speed is varied using the pump affinity laws. Essential for engineers evaluating variable-speed drives or re-rating existing pumps for new duty points.
Pipe Flow Calculator
Determine pressure drop in circular pipes using the Darcy-Weisbach equation. Use this when designing water supply lines, HVAC ducts, or industrial piping systems to ensure adequate flow.
Reynolds Number Calculator
Compute the Reynolds number to classify fluid flow as laminar, transitional, or turbulent. Essential for pipe design, aerodynamics, and any engineering problem involving fluid motion.
Pump Power Calculator
Calculate the shaft power and motor input power needed to pump a fluid against a given head. Use this for selecting pump and motor sizes in water supply, irrigation, and industrial systems.
Orifice Flow Calculator
Calculate volumetric flow rate through an orifice plate or sharp-edged opening given pressure drop and fluid properties. Widely used for flow metering in industrial pipelines and process plants.
Open Channel Flow Calculator
Compute flow rate and velocity in open channels — rivers, ditches, and culverts — using Manning's equation. Use it for drainage design, irrigation channel sizing, and flood capacity analysis.
Hydraulic Jump Calculator
Compute sequent depth, energy loss, and Froude number for a hydraulic jump in an open channel. Used by hydraulic engineers to design stilling basins and dissipate kinetic energy in spillways.
Venturi Meter Calculator
Determine the volumetric flow rate through a pipe using upstream and throat pressure readings from a Venturi meter. Ideal for engineers verifying flow in water treatment, HVAC, and chemical process pipelines.
Friction Factor Calculator
Find the Darcy-Weisbach friction factor for laminar or turbulent pipe flow from the Reynolds number and pipe roughness. Essential for calculating head loss in piping system designs.
Bernoulli Equation Calculator
Solve Bernoulli's equation to find downstream pressure in a flowing fluid given upstream conditions, elevation change, and system losses. Used in pipe system analysis, nozzle design, and pump selection.
Weir Flow Calculator
Calculate volumetric flow rate over rectangular, triangular, or trapezoidal weirs from the head of water above the weir crest. Used in irrigation canals, wastewater treatment, and stream gauging.
Darcy-Weisbach Pressure Drop Calculator
Calculates pressure drop along a pipe section using the Darcy-Weisbach equation. Used by engineers designing water supply, HVAC, and industrial piping systems to size pipes and pumps correctly.
Pipe Flow Reynolds Number Calculator
Computes the Reynolds number for flow inside a pipe to classify the flow as laminar, transitional, or turbulent. Essential for friction factor selection, heat transfer design, and mixing analysis.
Pump Power and Efficiency Calculator
Calculates the shaft power a pump must deliver to move fluid against a given head, accounting for pump efficiency. Used when selecting pumps for water supply, irrigation, HVAC, and industrial process systems.
Orifice Flow Discharge Calculator
Calculates the volumetric flow rate through an orifice plate or opening given the upstream-to-downstream pressure difference. Used in flow metering, tank drainage design, and hydraulic control systems.
Hydraulic Jump Depth Calculator
Calculates the sequent (conjugate) depth downstream of a hydraulic jump in open channel flow. Used by hydraulic engineers to design energy dissipators below spillways, sluice gates, and stilling basins.
Weir Flow Discharge Calculator
Estimate volumetric flow rate (discharge) over a weir structure given its width, head height, and discharge coefficient. Used by hydraulic engineers designing spillways, irrigation channels, and stormwater outlets.
Pipe Network Flow Distribution Calculator
Distribute flow between two parallel pipes based on their diameters, lengths, and roughness using Hardy-Cross principles. Useful for engineers balancing water distribution networks and designing parallel pipe systems.
Manning's Equation Open Channel Calculator
Compute flow velocity and discharge in open channels — rivers, canals, and drains — using Manning's equation. Essential for flood modelling, irrigation design, and stormwater drainage sizing.
Hazen-Williams Flow Rate Calculator
Calculate water flow rate in pressurised pipes using the Hazen-Williams equation given pipe diameter, hydraulic gradient, and C factor. Widely used by civil engineers for water main and irrigation system design.
Pump Affinity Laws Calculator
Predict how a centrifugal pump's flow, head, and power change when its speed or impeller size is altered, using the pump affinity laws. Ideal for engineers optimising pump operation or evaluating variable-speed drives.
Water Hammer Pressure Calculator
Calculates the pressure surge caused by sudden valve closure or rapid flow changes in a pipe. Essential for engineers designing water supply, oil, or industrial piping systems to avoid pipe bursts.
Hydraulic Jump Calculator
Analyzes hydraulic jump characteristics in open channel flow, including sequent depth, energy loss, and jump length. Used by hydraulic engineers designing spillways, stilling basins, and irrigation channels.