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