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#### Physics and Chemistry Constants Table

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 Constant Name Symbol Value Dimension Definition (Notes) acceleration due to gravity g 9.80665 m/s2 atomic mass unit, unified u 1.660538782(83) × 10-27 kg (Mass of 12C)/12 astronomical unit au 1.4959787066(30) × 1011 m Mean Earth to Sun distance Avogadro constant R 6.02214179(30) × 1023 mol-1 Particles in a mole of substance Bohr magneton µB 9.27400915(23) × 10-24 m2•A Bohr radius aoo 5.2917720859(36) × 10-11 m = α/(4πR∞) Boltzmann constant k 1.3806504(24) × 10-23 J/K Charge/Quantum ratio 2.417989454(60) × 1014 A/J = e/h Conductance quantum G0 7.7480917004(53) × 10-5 S = 2e2/h day, mean sidereal dsidereal 86164.090530833 s 23h + 56m +4.090 530833s deuteron (2H) mass md 3.34358320(17) × 10-27 Kg 1875.612793(47) MeV/c2 = 2.013553212724(78) u Earth mass ME 5.9736(76) × 1024 Kg Earth radius (equatorial) RE 6.37814 × 106 m electron charge magnitude eV 1.602176487(40) × 10-19 C electron rest mass me 9.10938215(45) × 10-31 Kg 0.510998910(13) MeV = 5.4857990942(23) × 10-4 u electron radius, classical re 2.8179402894(58) × 10-15 m = e2(4πε0mec2) electron Compton wavelength λe 2.4263102175(33) × 10-12 m = h/cme fine structure constant α 7.2973525376(50) × 10-3 N/A = μ0ce2/2h gravitation constant G 6.67428(67) × 10-11 m3/(kg.s2) = GM1M2/r122 Hubble constant H0 2.29(13) × 10-18 s-1 Josephson constant KJ 4.83597891(12) × 10-14 Hz/V = 2e/h light year (deprecated) ly 9.4607304 × 1016 m magnetic constant (vacuum permeability) µ0 2.067833667(52) × 10-15 W.b = h/2e magnetic flux quantum Φ0 1.2566370614 × 10-6 N·A-2 = 4π × 10-7 N·A-2 Naperian (natural) logarithm base e 2.718281828459045235 nuclear magneton µN 5.05078324(13) × 10-27 Kg parsec (au/arcsec) pc 3.08568025 × 1016 m permittivity of free space ε0 8.854187817 × 10-12 F/m Planck constant h 6.62606896(33) × 10-34 J.s Planck constant, reduced (Angular) hbar 1.054 571628(53) × 10-34 J.s Planck length lp 1.616252(81) × 10-35 m = ctp Planck mass mp 2.17644(11) × 10-8 kg = √(h/2π)c/G Planck time tp 5.39124(27) × 10-44 s = (h/2π)/mpc2 Planck temperature 1.416785(71) × 1032 K = mpc2/k proton rest mass mp 1.672621637(83) × 10-27 kg Quantum of circulation 3.6369475199(50) × 10-4 m2/s = h/2me Rydberg energy R∞ 1.0973731568527(73) × 107 m-1 = cα2me/2h speed of light in vacuum c 2.99792458 × 108 m/s Stefan-Boltzmann constant σ 5.6704(40) × 10-8 W/(m2 K4) = 2π5k4/15h3c2 Thompson cross section σT 6.6524 × 10-29 m2 = 8π.r02/3 Wien displacement law constant b 2.8977685(51) × 10-3 m.K year, sidereal (fixed star to fixed star, 1994) ysidereal 31558149.8 s year, tropical (equinox to equinox, 1994) y 31556925.2 s Von Klitzing constant RK 2.5812807557(18) × 104 Ω = h/e2

#### Mathematics Constants Table

 Constant Name Symbol Value Pi π 3.141592653589793 Euler's number, base of Natural logarithm e 2.718281828459045 Euler-Mascheroni constant γ 0.5772156649015329 Golden ratio f 1.6180339887498948 Plastic constant ρ 1.324717957244746 Embree-Trefethen constant ß 0.70258 Feigenbaum constant d 4.6692016091029907 Feigenbaum constant a 2.5029078750958928 Twin prime constant C2 0.6601618158468696 Meissel-Mertens constant M1 0.2614972128476428 Brun's constant B2 1.9021605823 Brun's constant B4 0.87058838 de Bruijn-Newman constant Λ -0.0000000027 Catalan's constant K 0.915965594177219 Landau-Ramanujan constant K 0.7642236535892207 Viswanath's constant K 1.13198824 Ramanujan-Soldner constant µ 1.4513692348833811 Erdos-Borwein constant EB 1.6066951524152918 Bernstein's constant ß 0.2801694990238691 Gauss-Kuzmin-Wirsing constant λ 0.3036630028987327 Hafner-Sarnak-McCurley constant s 0.353236371854996 Golomb-Dickman constant µ 0.6243299885435509 Cahen's constant 0.6434105463 Laplace limit 0.6627434193491816 Alladi-Grinstead constant 0.8093940205 Lengyel's constant Λ 1.0986858055 Levy's constant 3.2758229187218112 Apery's constant ζ 1.2020569031595943 Mill's constant θ 1.3063778838630807 Backhouse's constant 1.4560749485826897 Poerter's constant 1.4670780794 Lieb's constant 1.5396007178 Niven's constant 1.7052111401053678 Sierpinski's constant K 2.5849817595792532 Khinchin's constant 2.6854520010653064 Fransen-Robinson constant F 2.8077702420285194 Parabolic constant P2 2.2955871493926381 Omega constant Ω 0.5671432904097839 MRB constant 0.187859