Fluid Mechanics - Imperial and SI Units Dimensions

Imperial (USCS) and SI dimensions and units terminology in fluid mechanics.

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Fluid mechanics in the

Terminology	Dimensions	Imperial Units (USCS)	SI-units
Acceleration due to gravity	L / T²	ft/s²	m/s²
Area	L²	ft²	m²
Chezy roughness coefficient	L^1/2/ T	ft^1/2/s	m^1/2/s
Critical Depth	L	ft	m
Density	F T²/ L⁴	lb s²/ ft⁴	N s²/m⁴
Depth	L	ft	m
Depth in open channel	L	ft	m
Diameter	L	ft	m
Distance from solid boundary	L	ft	m
Flow rate	L³/ T	ft³/s	m³/s
Force	F	lb	N
Force due to pressure	F	lb	N
Hazen Williams roughness coefficient	L^0.37/ T	ft^0.37/s	m^0.37/s
Head loss due to friction	L	ft	m
Head of height	L	ft	m
Head of weir	L	ft	m
Height above datum	L	ft	m
Hydraulic radius	L	ft	m
Kinematic viscosity	L²/ T	ft²/s	m²/s
Length	L	ft	m
Manning's roughness coefficient	T / L^1/3	s/ft^1/3	s/m^1/3
Mass	F T²/ L	lb s²/ft	N s²/m
Modulus of elasticity	F / L²	lb/in² (psi)	Pa
Perimeter, Weir Height	L	ft	m
Pressure	F / L²	lb/ft²	Pa
Radius	L	ft	m
Shear stress	F / L²	lb/ft²	Pa
Size of roughness	L	ft	m
Specific weight	F / L³	lb/ft³	kg/m³
Surface tension	F / L	lb/ft	kg/m
Time	T	s	s
Thickness	L	ft	m
Time	T	s	s
Total head	L	ft	m
Unit flow rate	L³/ T L	ft³/(s ft)	m³/(s ft)
Velocity	L / T	ft/s	m/s
Viscosity	F T / L²	lb s/ft	Pa s
Weight	F	lbf	N

Chezys Conduit Flow Equation - Calculating volume flow and velcity in open conduits.
Fluid Flow Friction Loss - Hazen-Williams Coefficients - Hazen-Williams friction loss coefficients for commonly used piping materials.
Manning's Roughness Coefficients - Manning's roughness coefficients for some common materials.
SI System - An introduction to the SI metric system.
Symbols Used to Denote a Chemical Reactions and Process or Condition - Explanation of symbols used as subscripts or superscripts to tell more about the type of chemical reaction, process or condition.
Unit Converter with commonly used Units - Common converting units for Acceleration, Area, Density, Energy, Energy per unit mass, Force, Heat flow rate, Heat flux, Heat generation per unit volume and many more.
USCS - United States Customary System Units - An overview of the United States Customary System Units - Imperial Units.
Volume Flow - Online Unit Converter - Convert between volume flow units like gpm, liter/sec, cfm, m³/h.