Fundamental Physical Constants

In the course measuring physiological parameters, one often needs to make use of one or more fundamental physical constants. The following fundamental physical constants are commonly used in calculations involving physiological parameters. For a complete list as well as for the most up-to-date values, see the National Institutes of Standards and Technology.

Table of fundamental physical constants
Physical Constant	Symbol	Value	Unit
Atomic mass unit	amu or m_u	1.660538921 × 10⁻²⁷	kg
Avogadro's number	N_A	6.02214129 × 10²³	mol⁻¹
Boltzmann constant	k	1.3806488 × 10⁻²³	J K^−-1
Elementary charge (charge of an electron)	e	1.602176565 × 10⁻¹⁹	C
Electron mass	m_e	9.10938291 × 10⁻³¹	kg
Electron volt	eV	1.602176565 × 10⁻¹⁹	J
Faraday's constant	F	96485.3365	C mol⁻¹
Molar gas constant (Universal gas constant)	R	8.3144621 1.987 0.082057	J mol⁻¹ K⁻¹ cal mol⁻¹ K⁻¹ L atm mol⁻¹ K⁻¹
Planck's constant	h	6.62606957 × 10⁻³⁴	J s
Proton mass	m_p	1.672621777 × 10⁻²⁷	kg
proton-electron mass ratio	m_p/m_e	1836.15267245