Calculator catalog
Choose a category or search by quantity, component or engineering topic.
Found 121 calculators
Pressure from force and area
Calculates pressure as force divided by area.
Force from pressure and area
Calculates force from pressure and effective area.
Absolute pressure from gauge pressure
Calculates absolute pressure as gauge pressure plus atmospheric pressure.
Density from specific gravity
Calculates density from specific gravity and a user-supplied reference density.
Specific gravity from density
Calculates specific gravity from density and a user-supplied reference density.
Hydrostatic pressure from density and height
Calculates hydrostatic pressure from fluid density, gravity, and fluid column height.
Hydrostatic force from pressure and area
Calculates ideal hydrostatic force acting on the specified area.
Hydrostatic force on vertical wall
Calculates auxiliary hydrostatic force on a vertical surface from density, gravity, centroid depth, and area.
Buoyant force
Calculates buoyant force from fluid density, gravity, and displaced volume.
Volumetric flow rate
Calculates volumetric flow from area and velocity.
Pipe flow velocity
Calculates average pipe velocity from flow rate and pipe diameter.
Reynolds number
Calculates Reynolds number from density, velocity, diameter, and dynamic viscosity.
Dynamic pressure
Calculates dynamic pressure from fluid density and flow velocity.
Mass flow rate
Calculates mass flow rate from density and volumetric flow.
Velocity from continuity equation
Calculates flow velocity from volumetric flow and cross-sectional area.
Area from flow and velocity
Calculates required cross-sectional area from volumetric flow and velocity.
Pressure from ideal Bernoulli equation
Calculates pressure at the second point for ideal lossless flow.
Pipe cross-section area
Calculates circular pipe cross-section area from internal diameter.
Pipe diameter from area
Calculates pipe diameter from circular cross-section area.
Pipe velocity from flow and diameter
Calculates average velocity in a full circular pipe from volumetric flow rate and diameter.
Pipe diameter from flow and velocity
Calculates pipe diameter from volumetric flow and average velocity.
Pipe flow from diameter and velocity
Calculates volumetric pipe flow from diameter and average velocity.
Pipe volume
Calculates internal volume of a straight circular pipe from diameter and length.
Piston area
Calculates circular piston area from diameter.
Hydraulic cylinder force
Calculates ideal cylinder extension force from pressure and piston diameter.
Double-acting cylinder retract force
Calculates retract force from the annular piston area.
Cylinder speed from flow
Calculates motion speed from volumetric flow and piston area.
Hydraulic power
Calculates ideal hydraulic power from pressure and flow rate.
Hydraulic pressure from force and area
Calculates hydraulic pressure from force and effective area.
Hydraulic area from force and pressure
Calculates required effective area from force and pressure.
Cylinder bore from force and pressure
Calculates cylinder bore diameter from required force and pressure.
Cylinder force from bore and pressure
Calculates ideal extension force from pressure and cylinder bore.
Cylinder annulus area
Calculates rod-side annulus area from bore and rod diameter.
Cylinder retract force from bore, rod, and pressure
Calculates ideal retract force from pressure and annulus area.
Cylinder flow from speed and area
Calculates required volumetric flow from motion speed and effective area.
Cylinder stroke time
Calculates stroke time from stroke length and motion speed.
Hydraulic motor torque
Calculates ideal hydraulic motor torque from pressure drop and displacement.
Hydraulic motor speed
Calculates ideal hydraulic motor rotational speed from flow rate and displacement.
Darcy-Weisbach pressure loss
Calculates pipe pressure loss with the Darcy-Weisbach equation.
Darcy pressure drop
Calculates pipe pressure drop from friction factor, length, diameter, density, and velocity.
Head loss from pressure drop
Converts pressure drop to head loss for known density and gravity.
Pressure drop from head loss
Converts head loss to pressure drop for known density and gravity.
Minor-loss pressure drop
Calculates minor-loss pressure drop from coefficient K and dynamic pressure.
Minor-loss head
Calculates minor-loss head from coefficient K, velocity, and gravity.
Total pressure loss
Sums major and minor pressure losses.
Laminar-flow friction factor
Calculates the Darcy friction factor for laminar flow in a circular pipe.
Swamee-Jain friction factor
Calculates an approximate Darcy friction factor for turbulent pipe flow.
Hazen-Williams head loss
Calculates empirical head loss for water flow in a pipe using SI units.
Minor-loss equivalent length
Converts a minor-loss coefficient K to equivalent pipe length for a given diameter and friction factor.
Multiple pipe segments total loss
Sums head and pressure losses for several pipe segments carrying the same flow.
Colebrook-White friction factor
Iteratively solves the Colebrook-White equation.
Pipe flow and pressure loss
Combines flow, Reynolds number, friction and pressure losses.
Pipe diameter from allowed pressure drop
Solves diameter by bisection using the existing Colebrook-White core.
Hagen-Poiseuille flow
Laminar flow in a circular pipe.
Stokes drag law
Drag force on a spherical particle.
Stokes terminal velocity
Terminal velocity of a spherical particle.
Pitot tube
Velocity from differential pressure.
Venturi tube
Flow through a Venturi restriction.
Höppler falling-ball viscometer — dynamic viscosity
Calculates dynamic viscosity from viscometer constant, density difference, and ball fall time.
Ubbelohde capillary viscometer — kinematic viscosity
Calculates kinematic viscosity from capillary constant and flow time, and optionally dynamic viscosity from density.
Water hammer
First pressure-surge approximation using the Zhukovsky equation.
NPSHa and NPSH margin
Calculates NPSHa from absolute pressure and compares it with manufacturer NPSHr.
Pump affinity laws
Estimates the change in the same pump's parameters with speed.
Pumps in series
Ideal head addition at a common flow.
Pumps in parallel
Ideal flow addition at a common head.
Cv and Kv conversion
Converts valve flow coefficients between Cv and Kv conventions without manufacturer tables.
Pump operating point for quadratic curves
Intersects a simplified pump curve with a quadratic system curve.
Pump hydraulic power
Calculates hydraulic power from density, gravity, flow rate, and pump head.
Pump shaft power
Calculates required shaft power from hydraulic power and efficiency.
Pump efficiency
Calculates efficiency from hydraulic power and shaft power.
Pump head from pressure
Converts pump pressure rise to head.
Pump pressure from head
Converts pump head to pressure rise.
Basic pump specific speed
Calculates a simplified comparative pump specific-speed indicator.
Valve flow from Cv
Estimates liquid flow through a valve from Cv, pressure drop, and specific gravity.
Valve pressure drop from Cv
Estimates liquid pressure drop through a valve from flow rate, Cv, and specific gravity.
Valve Kv flow
Simplified liquid valve flow calculator from Kv, pressure drop in bar, and specific gravity.
Valve Cv flow
Simplified liquid valve flow calculator from Cv, pressure drop in psi, and specific gravity.
Orifice flow rate
Calculates indicative flow from Cd, area, pressure drop, and density.
Orifice pressure drop
Calculates indicative pressure drop from flow rate, Cd, area, and density.
Jet velocity from pressure
Calculates ideal jet velocity from pressure drop and density.
Nozzle exit velocity
Calculates ideal nozzle exit velocity from pressure drop and liquid density.
Jet force
Calculates simplified jet force from density, volumetric flow rate, and velocity.
Ideal-gas choked nozzle mass flow
Calculates choked mass flow and the critical pressure ratio for an ideal gas.
Ideal gas pressure
Calculates pressure from the ideal gas law for amount of substance, temperature, and volume.
Ideal gas volume
Calculates volume from the ideal gas law for amount of substance, temperature, and pressure.
Boyle law final pressure
Calculates final pressure at constant temperature from initial pressure, initial volume, and final volume.
Boyle law final volume
Calculates final volume at constant temperature from initial pressure, initial volume, and final pressure.
Pneumatic cylinder force
Calculates ideal pneumatic cylinder force from pressure and effective area.
Pneumatic cylinder extend force
Calculates auxiliary ideal pneumatic cylinder extend force from pressure and piston area.
Pneumatic cylinder retract force
Calculates auxiliary ideal pneumatic cylinder retract force from pressure, piston area, and rod area.
Pneumatic cylinder air volume
Calculates auxiliary geometric air volume from piston area and cylinder stroke.
Pneumatic cycle air consumption
Calculates auxiliary geometric flow from extend volume, retract volume, and cycles per minute.
Pneumatic cylinder air consumption
Calculates simplified geometric air volume from area, stroke, and cycle count.
Simple free air consumption
Converts cylinder volume to indicative free-air volume from absolute pressure.
Isothermal compressor power
Calculates simplified ideal isothermal compression power from inlet pressure, flow, and outlet pressure.
Pressure ratio
Calculates the ratio of two absolute pressures.
Standard flow to actual flow
Converts simplified standard flow to actual flow with pressure and temperature correction.
Mach number
Calculates Mach number as the ratio of flow velocity to speed of sound.
Froude number
Calculates Froude number from velocity, gravity, and characteristic length.
Weber number
Calculates Weber number as the ratio of inertial effects to surface tension.
Euler number
Calculates Euler number from pressure drop, density, and velocity.
Cavitation number
Calculates auxiliary cavitation number from pressure, vapor pressure, density, and flow velocity.
Prandtl number
Calculates Prandtl number from dynamic viscosity, specific heat, and thermal conductivity.
Simple compressor power
Calculates auxiliary compressor power from pressure increase, flow, and efficiency; it is not device selection.
Simple receiver tank pressure decay
Calculates auxiliary receiver pressure decay; this is a diagnostic simplification, not an exact thermodynamic model.
Speed of sound in ideal gas
Calculates speed of sound from heat capacity ratio, specific gas constant, and temperature.
Stagnation temperature
Calculates stagnation temperature for an isentropic ideal-gas model.
Isentropic stagnation pressure
Calculates stagnation pressure for an isentropic ideal-gas model.
Choked pressure ratio
Calculates critical throat-to-stagnation pressure ratio for an ideal gas.
Hydraulic radius
Calculates hydraulic radius from flow area and wetted perimeter.
Manning flow rate
Calculates open-channel flow with Manning equation from area, hydraulic radius, and slope.
Manning open-channel flow
Calculates auxiliary open-channel flow from area, hydraulic radius, slope, and Manning coefficient.
Rectangular channel area
Calculates rectangular channel flow area from width and depth.
Rectangular channel wetted perimeter
Calculates rectangular channel wetted perimeter from width and depth.
Rectangular channel hydraulic radius
Calculates rectangular channel hydraulic radius from width and depth.
Rectangular channel critical depth
Calculates critical depth from flow rate and rectangular channel width.
Rectangular hydraulic jump
Calculates sequent depth and energy loss for a rectangular hydraulic jump.
Rectangular weir flow
Calculates rectangular-weir flow using a user-supplied discharge coefficient.
V-notch weir flow
Calculates V-notch weir flow from notch angle, head, and discharge coefficient.
Pipe network solver
Steady node-link network solver for incompressible liquid flow with pipes, minor losses, pumps, and known-head or known-pressure boundary nodes.
Fluid properties database
Condition-specific fluid properties from the open CoolProp library: density, viscosity, specific heat and thermal conductivity with temperature and pressure.