List of scientific constants named after people

This is a list of physical and mathematical constants named after people. Eponymous constants and their influence on scientific citations have been discussed in the literature.


 * Apéry's constant – Roger Apéry
 * Archimedes' constant ($\pi$, pi) – Archimedes
 * Avogadro constant – Amedeo Avogadro
 * Balmer's constant – Johann Jakob Balmer
 * Belphegor's prime – Belphegor (demon)
 * Bohr magneton – Niels Bohr
 * Bohr radius – Niels Bohr
 * Boltzmann constant – Ludwig Boltzmann
 * Brun's constant – Viggo Brun
 * Cabibbo angle – Nicola Cabibbo
 * Chaitin's constant – Gregory Chaitin
 * Champernowne constant – D. G. Champernowne
 * Chandrasekhar limit – Subrahmanyan Chandrasekhar
 * Copeland–Erdős constant – Paul Erdős and Peter Borwein
 * Coulomb constant (electric force constant, electrostatic constant, $k e$) – Charles-Augustin de Coulomb
 * Eddington number – Arthur Stanley Eddington
 * Dunbar's number – Robin Dunbar
 * Embree–Trefethen constant
 * Erdős–Borwein constant
 * Euler–Mascheroni constant ($$\gamma$$) – Leonhard Euler and Lorenzo Mascheroni
 * Euler's number ($$e$$) – Leonhard Euler
 * Faraday constant – Michael Faraday
 * Feigenbaum constants – Mitchell Feigenbaum
 * Fermi coupling constant – Enrico Fermi
 * Gauss's constant – Carl Friedrich Gauss
 * Graham's number – Ronald Graham
 * Hartree energy – Douglas Hartree
 * Hubble constant – Edwin Hubble
 * Josephson constant – Brian David Josephson
 * Kaprekar's constant – D. R. Kaprekar
 * Kerr constant – John Kerr
 * Khinchin's constant – Aleksandr Khinchin
 * Landau–Ramanujan constant – Edmund Landau and Srinivasa Ramanujan
 * Legendre's constant (one, 1) – Adrien-Marie Legendre
 * Loschmidt constant – Johann Josef Loschmidt
 * Ludolphsche Zahl – Ludolph van Ceulen
 * Mean of Phidias (golden ratio, $$\phi$$, phi) – Phidias
 * Meissel–Mertens constant
 * Moser's number
 * Newtonian constant of gravitation (gravitational constant, $$G$$) – Sir Isaac Newton
 * Planck constant ($$h$$) – Max Planck
 * Reduced Planck constant or Dirac constant ($$h$$-bar, $ħ$) – Max Planck, Paul Dirac


 * Ramanujan–Soldner constant – Srinivasa Ramanujan and Johann Georg von Soldner
 * Richardson constant – Owen Willans Richardson
 * Rayo's number – Agustin Rayo
 * Rydberg constant – Johannes Rydberg
 * Sommerfeld constant – Arnold Sommerfeld
 * Sagan's number – Carl Sagan
 * Sackur–Tetrode constant – Otto Sackur and Hugo Tetrode
 * Sierpiński's constant – Wacław Sierpiński
 * Skewes' number – Stanley Skewes
 * Stefan–Boltzmann constant – Jožef Stefan and Ludwig Boltzmann
 * Theodorus' constant (√3 ≅ ±1.732050807568877...) – Theodorus of Cyrene
 * Tupper's number – Jeff Tupper
 * Viswanath's constant – Divakar Viswanath
 * von Klitzing constant – Klaus von Klitzing
 * Wien displacement law constant – Wilhelm Wien