円周率(Pi)(円周率100万(1,000,000)桁)(円周率10億(1,000,000,000)桁 [ZIP,447MB]) $$\pi$$ $$=$$ $$3.14159265358979323846...$$ アボガドロ数(Avogadro number) $$N_A$$ $$=$$ $$6.02214 \times 10^{23} \, mol^{-1}$$ ボルツマン定数(Boltzman constant) $$k_B$$ $$=$$ $$1.38065 \times 10^{-23} \, JK^{-1}$$ プランク定数(Planck constant) $$h$$ $$=$$ $$6.62607 \times 10^{-34} \, Js$$ $$\hbar = h/2\pi$$ $$=$$ $$1.05457 \times 10^{-34} \, Js$$ 気体定数(gas constant) $$R = N_Ak$$ $$=$$ $$8.31447 \, JK^{-1}mol^{-1}$$ 光速(speed of light) $$c$$ $$=$$ $$2.99792458 \times 10^{8} \, ms^{-1}$$ 電気素量(elementary charge) $$e$$ $$=$$ $$1.60218 \times 10^{-19} \, C$$ ファラデー定数(Faraday constant) $$F = N_Ae$$ $$=$$ $$9.6485 \times 10^4 \, C\, mol^{-1}$$ 原子質量単位(atomic mass unit) $$m_u = 1\,amu$$ $$=$$ $$1.66054 \times 10^{-27} \, kg$$ ボーア半径(Bohr radius) $$a_0 = 1\,bohr = 4\pi\varepsilon_0\hbar^2/e^2m_e$$ $$=$$ $$5.29177 \times 10^{-11} \, m$$ 質量(電子)(electron mass) $$m_e$$ $$=$$ $$9.10938 \times 10^{-31} \, kg$$ 質量(陽子)(proton mass) $$m_p$$ $$=$$ $$1.67262 \times 10^{-27} \, kg$$ 質量(中性子)(neutron mass) $$m_n$$ $$=$$ $$1.67493 \times 10^{-27} \, kg$$ 真空の誘電率(permittivity of vacuum) $$\varepsilon_0 = 1/\mu_0c^2$$ $$=$$ $$8.85419 \times 10^{-12} \, J^{-1}C^2m^{-1}$$ $$4\pi\varepsilon_0$$ $$=$$ $$1.11265 \times 10^{-10} \, J^{-1}C^2m^{-1}$$ 真空の透磁率(vacuum permeability) $$\mu_0$$ $$=$$ $$4\pi \times 10^{-7} \, Js^2C^{-2}m^{-1}$$ ボーア磁子(Bohr magneton) $$\mu_B = e\hbar/2m_e$$ $$=$$ $$9.27401 \times 10^{-24} \, JT^{-1}$$ 核磁子(nuclear magneton) $$\mu_N = e\hbar/2m_p$$ $$=$$ $$5.05078 \times 10^{-27} \, JT^{-1}$$ 自由電子のg因子(electron g-factor) $$g_e$$ $$=$$ $$2.00232$$ 微細構造定数(fine-structure constant) $$\alpha = \mu_0e^2c/2h$$ $$=$$ $$7.29735 \times 10^{-3}$$ $$\alpha^{-1}$$ $$=$$ $$1.37036 \times 10^2$$ 第二放射定数(second radiation constant) $$c_2 = hc/k$$ $$=$$ $$1.43878 \times 10^{-2} \, mK$$ シュテファン-ボルツマン定数(Stefan-Boltzmann constant) $$\sigma = 2\pi^5k^4/15h^3c^2$$ $$=$$ $$5.67040 \times 10^{-8} \, Wm^{-2}K^{-4}$$ リュードベリ定数(Rydberg constant) $$R_{\infty} = m_ee^4/8h^3c{\varepsilon_0}^2$$ $$=$$ $$1.09737 \times 10^{5} \, cm^{-1}$$ 標準重力加速度(standard gravitational acceleration) $$g$$ $$=$$ $$9.80665 \, ms^{-2}$$ 重力定数(gravitational constant) $$G$$ $$=$$ $$6.67428 \times 10^{-11} \, Nm^2kg^{-2}$$

$$hartree \, (a.u.)$$$$kJ \, mol^{-1}$$$$kcal \, mol^{-1}$$$$eV$$$$cm^{-1}$$
$$1 \, hartree \, (a.u.)$$$$=$$$$1$$$$2625.50$$$$627.51$$$$27.212$$$$2.1947 \times 10^5$$
$$1 \, kJ \, mol^{-1}$$$$=$$$$3.8088 \times 10^{-4}$$$$1$$$$0.23901$$$$1.0364 \times 10^{-2}$$$$83.593$$
$$1 \, kcal \, mol^{-1}$$$$=$$$$1.5936 \times 10^{-3}$$$$4.1840$$$$1$$$$4.3363 \times 10^{-2}$$$$349.75$$
$$1 \, eV$$$$=$$$$3.6749 \times 10^{-2}$$$$96.485$$$$23.061$$$$1$$$$8065.5$$
$$1 \, cm^{-1}$$$$=$$$$4.5563 \times 10^{-6}$$$$1.1963 \times 10^{-2}$$$$2.8591 \times 10^{-3}$$$$1.2398 \times 10^{-4}$$$$1$$

(最終更新: 2019年1月)