Fluid Mechanics Calculator

Fluid Mechanics Calculator contains 97 calculators to compute different Fluid Mechanics and Civil Engineering parameters — now with a solve-for-any-variable engine: in every calculator, choose the value you want to find and enter the rest.

Available in both USCS (Imperial Units) and SI (Metric Units).

What's new in this version:

• Filter calculators by category — pressure, open channel, pipe, groundwater, pump, and dimensionless numbers

• Solve for any variable — pick the unknown in each calculator; no more fixed inputs and outputs

• Share any calculation as an image

Features:

• 97 Fluid Mechanics and Civil Engineering calculators

• Automatic, instant results on every value and unit change

• USCS (Imperial) and SI (Metric) units throughout

• Clear formulas and definitions for every calculator

Calculator List:

Absolute Pressure

Brake Horsepower

Bernoulli Theorem for Head Loss

Bulk Modulus

Buoyant Force

Chezy Coefficient

Chezy Velocity

Compressibility

External Hydrostatic Pressure

Flow Rate

Fluid Density with Pressure

Fluid Pressure

Hydraulic Radius

Kinematic Viscosity

Liquid Phase Diffusion Coefficient

Pump Efficiency

Manning Flow Velocity

Mean Depth

Minor Losses

Net Positive Suction Head and Cavitation

Specific Gas Constant

Specific Gravity with Water Weight

Specific Gravity with Water Weight Loss

Specific Volume

Thrust Block

Water Horsepower

Acoustic Flow Meter

Bazin's Weir Flow

Broad Crested Weir

Curb Capture Flow Rate

Curb Gutter Flow Rate

French Drain Seepage Rate

Gutter Capture Efficiency

Gutter Carryover

Gutter Interception Capacity

Rectangular Weir

Rectangular Weir Discharge - Francis Equation

Orifice Flow Rate

Parshall Flume Flow Rate

Permeameter Porous Medium Flow Rate

Unconfined Aquifer Well Flow Rate

V notch Weir

Venturi Meter for Flow Rate

Hazen Williams - Fluid Flow Rate

Hazen Williams - Mean Fluid Velocity

Aluminum Pipe - Pressure Rating

Buried Corrugated Metal Pipe Thrust - Cross Sectional Area

Buried Corrugated Metal Pipe Thrust - Pipe Wall

Buried Corrugated Metal Pipe Thrust - Pressure

Ductile Iron Pipe - Pressure

Ductile Iron Pipe - Wall Thickness

Pipe Vacuum Pressure Load

Pipe Water Buoyancy Factor

Plastic Pipe - AWWA C900 Pressure Class

Plastic Pipe - Inside Diameter Controlled

Plastic Pipe - Outside Diameter Controlled

Plastic Pipe - Outside Diameter Controlled Short Term Strength

Plastic Pipe - Short Term Pressure Rating

Slotted Pipe Gutter Interception

Smooth Wall Steel Pipe - Pressure Rating

Soil Load Per Linear Length of Pipe

Restrained Anchored Pipe Stress

Pipe Soil Weight Pressure

Unrestrained Pipe Length Change

Poiseuille's Law

Stokes Law

Cauchy Number

Cavitation Number

Eckert Number

Euler Number

Fourier Number

Froude Number

Knudsen Number

Lewis Number

Mach Number

Prandtl Number

Reynolds Number

Schmidt Number

Sherwood Number

Nusselt Number

Peclet Number

Strouhal Number

Threshold Odor Number

Weber Number

Darcy Weisbach - Head Loss

Darcy's Law - Flow Rate

Darcy's Law - Flux

Darcy's Law - Hydraulic Gradient

Darcy's Law - Porosity

Darcy's Law - Saturated Soil

Darcy's Law - Seepage Velocity

Darcy's Law - Seepage Velocity and Porosity

Darcy's Law - Void Ratio

Water Hammer - Maximum Surge Pressure for a Fluid

Water Hammer - Maximum Surge Pressure for Water

Water Hammer - Maximum Surge Pressure Head

Water Hammer - Pressure Increase