Absolute zero
-273.16 C
Acceleration of free fall, standard
9.80665 m/s2
Avogadro constant
6.02213671023 1/mol
Base of natural logarithms
2.718281828
Bohr magneton
9.274015410-24 J/T
Bohr radius
5.2917724910-11 m
Boltzmann constant
1.38065810-23 J/K
Classical electron radius
2.8179409210-15 m
Dirac's constant
1.054588710-34 J s
Elementary charge
1.6021773310-19 C
Electron mass
9.109389710-31 kg
Electron-proton mass ratio
5.4461701310-4
Electronvolt
1.602189210-19 J
Faraday constant
96485.309 C/mol
Feigenbaum's constant
4.669210609102990
Fine-structure constant
7.2973530810-3
First radiation constant
3.741774910-16 W m2
Newtonian constant of gravitation
6.6725910-11 N m2/kg2
Hydrogen Rydberg number
1.0967758107 1/m
Josephson frequency-voltage quotient
4.83597671014 Hz/V
Loschmidt constant (T=273.15 K, p=100 kPa)
2.6867631025 1/m3
Magnetic flux quantum
2.0678346110-15 Wb
Molar gas constant
8.314510 J/mol K
Molar Planck constant
3.9903132310-10 J s/mol
Molar volume (Ideal gas, T=273.15 K, p=101.325 kPa)
0.02241410 m3/mol
Standard pressure
101325 Pa
Nuclear magneton
5.050786610-27 J/T
Permeability of vacuum
12.56637061410-7 N/A2
Permittivity of vacuum
8.85418781710-12 F/m
PI
3.1415926535897932
Planck constants
6.626075510-34 J s
Rydberg constant
10973731.534 1/m
Second radiation constant
0.01438769 m K
Solar constant
1400 W/m2
Speed of light in vacuum
299792458 m/s
Speed of sound in air at STP
340 m/s
Stefan-Boltzmann constant
5.6705110-8 W/m2 K4