Nomenclature & Symbols for Engineering, Mathematics, and Science
Formula nomenclature is a system of names or terms represented by letters and the Greek alphabet assigned to represent equation physical quantities. Definition symbols vary widely and do not necessarily represent the information being presented the way an abbreviation does. These alphabetical lists contain symbols, greek symbols, definitions, US units, metric units, dimensionless numbers, constants, and constant values.
Nomenclature & Symbols for Engineering, Mathematics, and Science
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Unit Equalities
| Unit - Symbol | English | Metric | SI |
| Ampere - \(A\), \(\;I\) |
\(I\) | \(I\) = \(\large{\frac{C}{s}}\) | \(C - s^{-1}\) |
| Btu - \(Btu\) | \(Btu\) = \(lbf-ft\) | \(Btu\) = \(J\) = \(kJ\) = \(W-h\) | \(J\) |
| Celsius - \(C\) | - | \(C\) | \(x+273.15\;K\) |
| Coulomb - \(C\) | - | \(C\) = \(A-s\) | \(A-s\) |
| Farad - \(F\) | - | \(F\) = \(\large{\frac{s^4-A^2}{kg-m^2}}\) = \(\large{\frac{S^2-C^2}{kg-m^2}}\) = \(\large{\frac{C}{V}}\) = \(\large{\frac{A-s}{V}}\) = \(\large{\frac{W-s}{V^2}}\) = \(\large{\frac{J}{V^2}}\) = \(\large{\frac{N-m}{V^2}}\) = \(\large{\frac{C^2}{J}}\) = \(\large{\frac{C^2}{N-m}}\) = \(\large{\frac{S}{\Omega}}\) = \(\large{\frac{1}{\Omega-Hz}}\) = \(\large{\frac{S}{Hz}}\) = \(\large{\frac{s^2}{H}}\) | \(s^4-A^2-kg^{-1}-m^{-2}\) |
| Gauss - \(G\) | - | \(G\) = \(\large{\frac{T}{10^4}}\) = \(Mx-cm^2\) = \(\large{\frac{g}{Bi-s^2}}\) | \(T-10^{-4}\) |
| Henry - \(H\) | - | \(H\) = \(\large{\frac{kg-m^2}{s^2-A^2}}\) = \(\large{\frac{N-m}{A^2}}\) = \(\large{\frac{kg-m^2}{C^2}}\) = \(\large{\frac{J}{A^2}}\) = \(\large{\frac{T-m^2}{A}}\) = \(\large{\frac{Wb}{A}}\) = \(\large{\frac{V-s}{A}}\) = \(\large{\frac{s^2}{F}}\) = \(\large{\frac{\Omega}{Hz}}\) = \(\Omega-s\) | \(kg-m^2-s^{-2}-A^{-2}\) |
| Hertz - \(Hz\) | - | \(Hz\) = \(s^{-1}\) (one cycle per sec) | \(s^{-1}\) |
| Horespower - \(hp\) | \(hp\) | \(hp\) = \(W\) | \(W\) |
| Joule - \(J\) | \(lbf-ft\) | \(J\) = \(\large{\frac{kg-m^2}{s^2}}\) = \(N-m\) = \(Pa-m^3\) = \(W-s\) = \(C-V\) = \(\Omega-A^2-s\) | \(kg-m^2-s^{-2}\) |
| Joule-sec - \(J-s\) | \(\large{\frac{lbf-ft}{sec}}\) | \(J-s\) = \(\large{\frac{kg-m^2}{s}}\) | \(kg-m^2-s^{-1}\) |
| Kelvin - \(K\) | - | \(K\) | \(x-273.15\;C\) |
| Maxwell - \(Mx\) | - | \(Mx\) = \(\large{\frac{Wb}{10^{8}}}\) = \(\large{\frac{G}{cm^2}}\) | \(Wb-10^{-8}\) |
| Newton - \(N\) | \(lbf\) | \(N\) = \(\large{\frac{kg-m}{s^2}}\) | \(kg-m-s^{-2}\) |
| Newton-meter - \(N-m\) | \(lbf-ft\) | \(N-m\) = \(\large{\frac{kg-m^2}{s^2}}\) | \(kg-m^2-s^{-2}\) |
| Ohm - \((\Omega)\), \(\;(R)\) | \(\Omega\) | \(\Omega\) = \(\large{\frac{kg-m^2}{s^3-A^2}}\) = \(\large{\frac{kg-m^2}{s-C^2}}\) = \(\large{\frac{J}{s-A^2}}\) = \(\large{\frac{V}{A}}\) = \(\large{\frac{1}{S}}\) = \(\large{\frac{W}{A^2}}\) = \(\large{\frac{V^2}{W}}\) = \(\large{\frac{s}{F}}\) = \(\large{\frac{H}{s}}\) = \(\large{\frac{J-s}{C^2}}\) | \(kg-m^2-s^{-3}-A^{-2}\) |
| Poise - \(P\) | \(\large{\frac{lbf}{ft-sec}}\) | \(P\) = \(\large{\frac{kg}{0.1\;m-s}}\) = \(1\;dyn-s-cm^2\) = \(\large{\frac{N-s}{m^2}}\) | \(kg-0.1\;m^{-1}-s^{-1}\) |
| Pascal - \(Pa\) | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) = \(\large{\frac{kg}{m-s^2}}\) = \(\large{\frac{N}{m^2}}\) = \(\large{\frac{J}{m^3}}\) | \(kg-m^{-1}-s^{-2}\) |
| Pascal-sec - \(Pa-s\) | \(\large{\frac{lbf-sec}{ft^2}}\) | \(Pa-s\) = \(\large{\frac{kg}{m-s}}\) = \(\large{\frac{N-s}{m^2}}\) = \(10\;P\) | \(kg-m^{-1}-s^{-1}\) |
| MegaPascal - \(MPa\) | \(\large{\frac{lbf}{in^2}}\) | \(MPa\) = \(\large{\frac{N}{mm^2}}\) | \(N-mm^{-2}\) |
| Siemens - \(S\) | - | \(S\) = \(\large{\frac{s^3-A^2}{kg-m^2}}\) | \(s^3-A^2-kg^{-1}-m^{-2}\) |
| Tesla - \(T\) | - | \(T\) = \(\large{\frac{kg}{s^2-A}}\) = \(\large{\frac{V-s}{m^2}}\) = \(\large{\frac{N}{A-m}}\) = \(\large{\frac{J}{A-m^2}}\) = \(\large{\frac{H-A}{m^2}}\) = \(\large{\frac{Wb}{m^2}}\) = \(\large{\frac{kg}{C-s}}\) = \(\large{\frac{N-s}{C-m}}\) = \(\large{\frac{kg}{A-s^2}}\) | \(kg-s^{-2}-A^{-1}\) |
| Torr - \(Torr\) | - | \(Torr\) = \(Pa\) | \(kg-m^{-1}-s^{-2}\) |
| Volt - \(V\) | \(V\) |
\(V\) = \(\large{\frac{kg-m^2}{s^{3}-A}}\) = \(A-\Omega\) = \(\large{\frac{Wb}{s}}\) = \(\large{\frac{W}{A}}\) = \(\large{\frac{J}{C}}\) = \(\large{\frac{eV}{e}}\)
|
\(kg-m^2-s^{-3}-A^{-1}\) |
| Watt - \((W)\), \(\;(P)\) | \(\large{\frac{lbf-ft^2}{ssec^3}}\) | \(W\) = \(\large{\frac{kg-m^2}{s^3}}\) = \(\large{\frac{J}{s}}\) = \(\large{\frac{N-m}{s}}\) | \(kg-m^2-s^{-3}\) |
| Weber - \(Wb\) | \(\large{\frac{V}{sec}}\) | \(Wb\) = \(\large{\frac{kg-m^2}{s^2-A}}\) = \(\large{\frac{N-m}{A}}\) = \(\large{\frac{J}{A}}\) = \(\Omega-C\) = \(V-s\) = \(H-S\) = \(T-m^2\) = \(10^8-Mx\) | \(kg-m^2-s^{-2}-A^{-1}\) |
| Unit - Symbol | English | Metric | SI |
