This is a very comprehensive list of most physical constants needed to perform routine (and some not-so-routine)
tasks. Oddly enough (and scarily enough), a search on the Internet, and printed texts as well, will turn up sometimes
significantly different values for these "constants."
As with all endeavors of importance, you are advised to collaborate the values presented here with a second
source that you trust.
| Absolute Entropy Constant |
-1.1517048 |
|
| Absolute Entropy Constant |
-1.1648678 |
|
| Absolute Zero |
-273.15 |
°C |
| Acceleration of Free Fall on Earth |
9.80665 |
m/s^2 |
| Acceleration of Free Fall on Earth |
32.174 |
ft/s^2 |
| Acre |
4046.856422 |
m^2 |
| Air Density |
1.2929 |
kg/m^3 |
| Air Viscosity @ (20°C) |
0.000018 |
N s/m^2 |
| Alladi-Grinstead Constant |
0.809394021 |
|
| Ångström |
1E-10 |
m |
| Année-lumière ly |
9.46053E+15 |
m |
| Apéry's Constant |
1.202056903 |
|
| Apothecaries' Ounce |
0.031103477 |
kg |
| Astronomical Unit AU |
1.49598E+11 |
m |
| Atmospheric Pressure |
101325 |
N/m^2 |
| Atmospheric Pressure |
1.01325 |
bar |
| Atmospheric Pressure |
14.7 |
lbf/in^2 |
| Atomic Mass Unit |
1.66054E-27 |
kg |
| Atomic Mass Unit |
931.494013 |
MeV |
| Atomic Mass Unit |
1.49242E-10 |
J |
| Avogadro Constant NA |
6.02214E+23 |
mol-1 |
| Avoirdupois Ounce oz |
0.028349523 |
kg |
| Avoirdupois Ounce oz |
0.0625 |
lb (av.) |
| Avoirdupois Ounce oz |
16 |
drachms (av.) |
| Backhouse's Constant |
1.456074949 |
|
| Base of Natural Logarithms |
2.718281828 |
|
| Bernstein's Constant |
0.280169499 |
|
| Board Foot (Timber) |
0.002359737 |
m^3 |
| Bohr Magneton |
9.27401E-24 |
J/T |
| Bohr Magneton |
5.78838E-05 |
eV/T |
| Bohr Magneton |
13996246240 |
Hz/T |
| Bohr Radius |
5.29177E-11 |
m |
| Boltzmann Constant |
1.38065E-23 |
J/K |
| Boltzmann Constant |
8.61734E-05 |
eV/K |
| Boltzmann Constant |
20836644000 |
Hz/K |
| Briggsian logarithm log10(2) |
0.301029996 |
|
| Brun's Constant B |
1.902160582 |
|
| Cahen's Constant |
0.62946502 |
|
| Carbon-14 Half-life of T |
5570 |
years |
| Catalan's Constant |
0.915965594 |
|
| Chain |
20.1168 |
m |
| Characteristic Impedence of Vacuum |
376.7303135 |
Ohm |
| Charge to Mass Quotient(Electron) |
-1.75882E+11 |
C/kg |
| Charge to Mass Quotient (Proton) |
95788340.8 |
C/kg |
| Charge (Electron) |
1.60218E-19 |
C |
| Charge (Electron) |
2.41799E+14 |
A/J |
| Charge (Electron Specific) |
-1.75882E+11 |
C/kg |
| Charge (Elementary) |
1.60218E-19 |
C |
| Charge (Elementary) |
2.41799E+14 |
A/J |
| Circulation (Quantum) |
0.000363695 |
m2/s |
| Circulation (Quantum) |
0.00072739 |
m2/s |
| Classical Electron Radius |
2.81794E-15 |
m |
| Common Logarithm of 2 log10(2) |
0.301029996 |
|
| Compton Wavelength of Electron |
2.42631E-12 |
m |
| Compton Wavelength (Muon ) |
1.17344E-14 |
m |
| Compton Wavelength (Neutron) |
1.31959E-15 |
m |
| Compton Wavelength (Proton) |
1.32141E-15 |
m |
| Compton Wavelength (Tau) |
6.977E-16 |
m |
| Conductance Quantum |
7.74809E-05 |
S |
| Conductance (Quantized Hall) |
3.87405E-05 |
S |
| Copper (Linear Expansivity) |
0.000017 |
K-1 |
| Copper (Specific Heat Capacity) |
385 |
J kg-1 K-1 |
| Copper (Thermal Conductivity) |
385 |
W/m/K |
| Copper (Young Modulus) |
1.3E+11 |
Pa |
| Cord (Timber UK) |
3.624556364 |
m^3 |
| Critical Temperature of Air |
-190 |
°C |
| Cross Section (Thomson) |
6.65246E-29 |
m^2 |
| Cube Foot |
0.028316847 |
m^3 |
| Cube Inch |
1.63871E-05 |
m^3 |
| Cube Yard |
7.64555E-05 |
m^3 |
| Curie |
37000000000 |
Bq |
| Dalton |
1.66054E-27 |
kg |
| Dalton |
931.494013 |
MeV |
| Dalton |
1.49242E-10 |
J |
| Daniel Cell (emf) |
1.08 |
V |
| Density of Air (at stp) |
0.7734 |
m^3/kg |
| Density of Air (at stp) |
1.2929 |
kg/m^3 |
| Density (Earth's Average) |
5517 |
kg/m^3 |
| Deuteron Magnetic Moment |
4.33074E-27 |
J/T |
| Deuteron Magnetic Moment |
0.000466975 |
µB |
| Deuteron Magnetic Moment |
0.85743823 |
µN |
| Deuteron Molar Mass |
2.013553214 |
u |
| Deuteron Rest Mass |
3.34359E-27 |
kg |
| Deuteron Rest Mass |
2.013553214 |
u |
| Deuteron Rest Mass |
1875.61339 |
MeV/c^2 |
| Deuteron-Electron Magnetic Moment Ratio |
0.000466435 |
|
| Deuteron-Electron Rest Mass Ratio |
3670.483014 |
|
| Deuteron-Proton Magnetic Moment Ratio |
0.307012204 |
|
| Deuteron-Proton Rest Mass Ratio |
1.999007496 |
|
| Dirac's Constant |
1.05457E-34 |
J s |
| Dirac's Constant |
6.58212E-16 |
eV s |
| Drachm (Avoirdupois) |
0.001771845 |
kg |
| Dry Pint (US) |
0.00055061 |
m^3 |
| e |
2.718281828 |
|
| Earth's Average Density |
5517 |
kg/m^3 |
| Earth's Average Radius |
6370000 |
m |
| Earth's Magnetic Field (Horizontal Component) |
0.000018 |
T |
| Earth's Mass |
5.972E+24 |
kg |
| Earth-Moon Mean Distance |
384400000 |
m |
| Electric Constant |
8.85419E-12 |
F/m |
| Electron Charge |
1.60218E-19 |
C |
| Electron Charge |
2.41799E+14 |
A/J |
| Electron Charge to Mass Quotient |
-1.75882E+11 |
C/kg |
| Electron g-Factor |
-2.002319304 |
|
| Electron Gyromagnetic Ratio |
1.76086E+11 |
s-1 T-1 |
| Electron Gyromagnetic Ratio |
28024.954 |
MHz/T |
| Electron Magnetic Moment |
-9.28476E-24 |
J/T |
| Electron Magnetic Moment |
-1.001159652 |
|
| Electron Magnetic Moment |
-1838.281966 |
|
| Electron Magnetic Moment Anomaly |
0.001159652 |
|
| Electron Mass |
9.10938E-31 |
kg |
| Electron Mass |
0.00054858 |
u |
| Electron Mass |
0.510998902 |
MeV |
| Electron Molar Mass |
5.4858E-07 |
kg/mol |
| Electron Radius (Classical) |
2.81794E-15 |
m |
| Electron Specific Charge |
-1.75882E+11 |
C/kg |
| Electron to Shielded Helion Magnetic Moment Ratio (gas sphere 25°C) |
864.058255 |
|
| Electron to Shielded Proton Magnetic Moment Ratio (H2O sphere 25°C) |
-658.2275954 |
|
| Electron-a-Particle Mass Ratio |
0.000137093 |
|
| Electron-Deuteron Magnetic Moment Ratio |
-2143.923498 |
|
| Electron-Deuteron Mass Ratio |
0.000272444 |
|
| Electron-Muon Magnetic Moment Ratio |
206.766972 |
|
| Electron-Muon Mass Ratio |
0.004836332 |
|
| Electron-Neutron Magnetic Moment Ratio |
960.9205 |
|
| Electron-Neutron Mass Ratio |
0.000543867 |
|
| Electron-Proton Magnetic Moment Ratio |
-658.2106875 |
|
| Electron-Proton Mass Ratio |
0.000544617 |
|
| Electron-Tau Mass Ratio |
0.000287555 |
|
| Electronvolt |
1.60218E-19 |
J |
| Elementary Charge |
1.60218E-19 |
C |
| Elementary Charge |
2.41799E+14 |
A/J |
| emf of Daniell Cell |
1.08 |
V |
| emf of Lechlanché Cell |
1.46 |
V |
| emf of Nife Cell |
1.4 |
V |
| emf of Weston Cell |
1.0186 |
V |
| Energy Production (Sun's) |
3.9E+26 |
W |
| Energy (Hartree) |
4.35974E-18 |
J |
| Energy (Hartree) |
27.2113834 |
eV |
| Euler's Constant |
0.577215665 |
|
| Faraday Constant |
96485.3415 |
C/mol |
| Fathom fath |
1.8288 |
m |
| Fathom fath |
72 |
in |
| Fathom fath |
6 |
ft |
| Feigenbaum's Constant |
4.669210609 |
|
| Fermi Constant |
1.4E-50 |
J m-3 |
| Fermi Coupling Constant |
1.16639E-05 |
GeV-2 |
| Fine Structure Constant |
0.007297353 |
|
| First Radiation Constant |
3.74177E-16 |
W m2 |
| First Radiation Constant for Spectral Radiance |
1.19104E-16 |
W m^2/sr |
| Fluid Ounce UK |
0.00002841 |
m^3 |
| Fluid Ounce US |
0.00002957 |
m^3 |
| Foot |
0.3048 |
m |
| Foot (Board Timber) |
0.002359737 |
m^3 |
| Foot (Cube) |
0.028316847 |
m^3 |
| Foot (Cube) |
1728 |
in^3 |
| Fransén-Robinson Constant |
2.807770242 |
|
| Free Neutron (Half-life) |
650 |
s |
| Free Space (Permeability) |
1.25664E-06 |
N/A^2 |
| Free Space (Permittivity) |
8.85419E-12 |
F/m |
| g-Factor (Electron) |
-2.002319304 |
|
| g-Factor (Muon) |
-2.002331832 |
|
| g-Factor (Neutron) |
-3.82608545 |
|
| g-Factor (Proton) |
5.585694675 |
|
| Gallon (UK) |
0.004546 |
m^3 |
| Gallon (UK) |
1.201 |
US gallon |
| Gallon (US) |
0.003785 |
m^3 |
| Gallon (US) |
0.833 |
UK gallon |
| Gas Constant |
8.314 |
J K-1 mol-1 |
| Gas Constant |
8.314472 |
J mol-1 K-1 |
| Geepound |
14.59390294 |
kg |
| Glass (Refractive Index) |
1.5 |
|
| Glass (Thermal Conductivity) |
1 |
W m-1 K-1 |
| Gold Number |
1.618033989 |
|
| Golden Mean |
1.618033989 |
|
| Golomb-Dickman Constant |
0.624329989 |
|
| Grain |
0.06479 |
g |
| Gravitation (Newtonian Constant) |
6.673E-11 |
m^3 kg-1 s-1 |
| G/hc |
6.707E-39 |
(GeV/c2)-2 |
| Gravitational Acceleration (Moon's) |
1.619 |
m s-2 |
| Gravitational Constant |
6.673E-11 |
N m^2 kg-2 |
| Gravity (Acceleration) |
9.80665 |
m s-2 |
| Gravity (Acceleration) |
32.174 |
ft s-2 |
| Gunter's Chain |
20.1168 |
m |
| Gyromagnetic Ratio (Electron) |
1.76086E+11 |
s-1 T-1 |
| Gyromagnetic Ratio (Electron) |
28024.954 |
MHz T-1 |
| Gyromagnetic Ratio (Neutron) |
183247188 |
s-1 T-1 |
| Gyromagnetic Ratio (n/2p) |
29.1646958 |
MHz T-1 |
| Gyromagnetic Ratio (Proton) |
267522212 |
m s-1 T-1 |
| Gyromagnetic Ratio (Proton) |
42.5774825 |
MHz T-1 |
| Gyromagnetic Ratio (Shielded Proton H2O sphere 25°C) |
267515341 |
/s/T |
| Hafner-Sarnak-McCurley Constant |
0.353236372 |
|
| Half-life of Carbon-14 |
5570 |
years |
| Half-life of Free Neutron |
650 |
s |
| Hard Square Entropy Constant |
1.503048082 |
|
| Hartree Energy |
4.35974E-18 |
J |
| Hartree Energy |
27.2113834 |
eV |
| Hectare |
104 |
m^2 |
| Horizontal Component of Earth's Magnetic Field |
0.000018 |
T |
| Hundredweight (UK) |
50800 |
g |
| Hundredweight (Short US) |
45350 |
g |
| Hydrogen Rydberg Number |
10967758 |
m-1 |
| Impedence of Vacuum Z0 |
376.7303135 |
Ohm |
| Imperial Pint |
0.0005682 |
m^3 |
| Inch |
0.254 |
m |
| Inch (Cube) |
1.63871E-05 |
m^3 |
| International Nautical Mile |
1852 |
m |
| Inverse Conductance Quantum |
12906.403786 Ohm |
|
| Inverse Fine Structure Constant |
0.137036 |
|
| Josephson Frequency-Voltage Quotient |
4.83598E+14 |
Hz/V |
| Khintchine's Constant |
2.685452001 |
|
| Landau-Ramanujan Constant |
0.764223653 |
|
| Laplace Limit Constant |
0.662743419 |
|
| Lechlanché Cell (emf) |
1.46 |
V |
| Length (Planck) |
1.616E-35 |
m |
| Lengyel's Constant |
1.098685806 |
|
| Lieb's Square Ice Constant |
1.539600718 |
|
| Light Year |
9.46053E+15 |
m |
| Light Speed of (in a Vacuum) |
299792458 |
m/s |
| Linear Expansivity of Copper |
0.000017 |
K-1 |
| Linear Expansivity of Steel |
0.000012 |
K-1 |
| Liquid Pint (US) |
0.0004731 |
m^3 |
| Litre |
0.001 |
m^3 |
| Loschmidt Constant |
2.68678E+25 |
m-3 |
| Loschmidt Constant (T=273.15K; p=100kPa) |
0.022710981 |
m^3/mol |
| Madelung's Constant |
-1.615542627 |
|
| Magnetic Constant |
1.25664E-06 |
N A-2 |
| Magnetic Flux Quantum |
2.06783E-15 |
Wb |
| Magnetic Moment Anomaly (Electron) |
0.001159652 |
|
| Magnetic Moment Anomaly (Muon) |
0.001165916 |
|
| Magnetic Moment Ratio (Deuteron-Electron) |
0.000466435 |
|
| Magnetic Moment Ratio (Deuteron-Proton) |
0.3070122035(51) |
|
| Magnetic Moment Ratio (Electron to Shielded Helion gas sphere 25°C) |
864.058255(10) |
|
| Magnetic Moment Ratio (Electron to Shielded Proton H2O sphere 25°C) |
-658.2275954(71) |
|
| Magnetic Moment Ratio (Electron-Deuteron) |
-2143.923498 |
|
| Magnetic Moment Ratio (Electron-Muon) |
206.766972 |
|
| Magnetic Moment Ratio (Electron-Neutron) |
960.9205 |
|
| Magnetic Moment Ratio (Electron-Proton) |
-658.2106875 |
|
| Magnetic Moment Ratio (Muon-Proton) |
-3.18334539 |
|
| Magnetic Moment Ratio (Neutron to Shielded Proton H2O- sphere- 25°C) |
-0.68499694(16) |
|
| Magnetic Moment Ratio (Neutron-Electron) |
0.001040669 |
|
| Magnetic Moment Ratio (Neutron-Proton) |
-0.68497934 |
|
| Magnetic Moment Ratio (Proton-Neutron) |
-1.45989805 |
|
| Magnetic Moment (Deuteron) |
0.43307375(15)e-26 |
J/T |
| Magnetic Moment (Deuteron) |
0.000466975 |
µB |
| Magnetic Moment (Deuteron) |
0.85743823 |
µN |
| Magnetic Moment (Electron µe) |
-9.28476E-24 |
J/T |
| Magnetic Moment (Electron µe/µB) |
-1.001159652 |
|
| Magnetic Moment (Electron µe/µN) |
-1838.281966 |
|
| Magnetic Moment (Muon µµ) |
-4.49045E-26 |
J/T |
| Magnetic Moment (Muon µµ/µB) |
-0.004841971 |
|
| Magnetic Moment (Muon µµ/µN) |
-8.8905977 |
|
| Magnetic Moment (Neutron µn) |
-9.66236E-27 |
J/T |
| Magnetic Moment (Neutron µn/µB0 |
-0.001041876 |
|
| Magnetic Moment (Neutron µn/µN) |
-1.91304272 |
|
| Magnetic Moment (Proton µp) |
1.41061E-26 |
J/T |
| Magnetic Moment (Proton µp/µB) |
0.001521032 |
|
| Magnetic Moment (Proton µp/µN) |
2.792847337 |
|
| Magneton (Bohr) |
9.27401E-24 |
J/T |
| Magneton (Bohr) |
5.78838E-05 |
eV/T |
| Magneton (Bohr) |
13996246240 |
Hz/T |
| Magneton (Nuclear) |
5.05078E-27 |
J/T |
| Magneton (Nuclear) |
3.15245E-08 |
eV/T |
| Magneton (Nuclear) |
7.62259396 |
MHz/T |
| Mass Ratio (Deuteron-Electron Rest) |
3670.483014 |
|
| Mass Ratio (Deuteron-Proton Rest) |
1.999007496 |
|
| Mass Ratio (Electron-a-Particle) |
0.000137093 |
|
| Mass Ratio (Electron-Deuteron) |
0.000272444 |
|
| Mass Ratio (Electron-Muon) |
0.004836332 |
|
| Mass Ratio (Electron-Neutron) |
0.000543867 |
|
| Mass Ratio (Electron-Proton) |
0.000544617 |
|
| Mass Ratio (Electron-Tau) |
0.000287555 |
|
| Mass Ratio (Muon-Electron) |
206.7682657 |
|
| Mass Ratio (Muon-Neutron) |
0.112454508 |
|
| Mass Ratio (Muon-Proton) |
0.112609517 |
|
| Mass Ratio (Muon-Tau) |
0.0594572 |
|
| Mass Ratio (Neutron-Electron) |
1.838683655 |
|
| Mass Ratio (Neutron-Muon) |
8.89248478 |
|
| Mass Ratio (Neutron-Proton) |
1.001378419 |
|
| Mass Ratio (Neutron-Tau) |
0.528722 |
|
| Mass Ratio (Proton-Electron) |
1836.152668 |
|
| Mass Ratio (Proton-Muon) |
8.88024408 |
|
| Mass Ratio (Proton-Neutron) |
0.998623479 |
|
| Mass Ratio (Proton-Tau) |
0.527994 |
|
| Mass Ratio (Tau-Electron) |
3477.48 |
|
| Mass Ratio (Tau-Muon) |
16.8188 |
|
| Mass Ratio (Tau-Neutron) |
1.89135 |
|
| Mass Ratio (Tau-Proton) |
1.89396 |
|
| Mass (Deuteron Rest) |
3.34359E+27 |
kg |
| Mass (Deuteron Rest) |
2.013553214 |
u |
| Mass (Deuteron Rest) |
1875.61339 |
MeV/c^2 |
| Mass (Earth's) |
5.972E+24 |
kg |
| Mass (Sun's) |
1.99E+30 |
kg |
| Mass (Tau) |
3.16788E-27 |
kg |
| Mass (Tau) |
1.90774 |
u |
| Mile |
1609.344 |
m |
| Mile (Square) |
2589000 |
m^2 |
| Mills' Constant |
1.306377884 |
|
| Molar Gas Constant |
8.314472 |
J mol-1 K-1 |
| Molar Mass (Deuteron) |
2.013553214 |
u |
| Molar Mass (Electron) |
5.4858E-07 |
kg/mol |
| Molar Mass (Muon) |
0.000113429 |
kg/mol |
| Molar Mass (Neutron) |
0.001008665 |
kg/mol |
| Molar Mass (Proton) |
0.001007276 |
kg/mol |
| Molar Mass (Tau NAmt) |
0.00190774 |
kg/mol |
| Molar Planck Constant |
3.99031E-10 |
J s/mol |
| Molar Planck Constant |
0.119626565 |
J m/mol |
| Molar Volume (Ideal Gas T=273.15 K p=101.325 kPa) |
0.022413996 |
m^3 mol-1 |
| Moon's Gravitational Acceleration |
1.619 |
m/s^2 |
| Moon's Mean Density |
3330 |
kg/m^3 |
| Moon's Mean Distance from Earth |
384400000 |
m |
| Moon's Mean Mass |
7.33E+22 |
kg |
| Moon's Mean Radius |
1738000 |
m |
| Muon Compton Wavelength |
1.17344E-14 |
m |
| Muon g-Factor |
-2.002331832 |
|
| Muon Magnetic Moment |
-4.49045E-26 |
J/T |
| Muon Magnetic Moment |
-0.004841971 |
|
| Muon Magnetic Moment |
-8.8905977 |
|
| Muon Magnetic Moment Anomaly |
0.001165916 |
|
| Muon Mass |
1.88353E-28 |
kg |
| Muon Mass |
0.113428917 |
u |
| Muon Mass |
105.6583568 |
MeV |
| Muon Molar Mass |
0.000113429 |
kg/mol |
| Muon-Electron Mass Ratio |
206.7682657 |
|
| Muon-Neutron Mass Ratio |
0.112454508 |
|
| Muon-Proton Magnetic Moment Ratio |
-3.18334539 |
|
| Muon-Proton Mass Ratio |
0.112609517 |
|
| Muon-Tau Mass Ratio |
0.0594572 |
|
| Naperian (natural) logarithm ln(10) |
2.302585093 |
|
| Naperian (natural) logarithm ln(2) |
0.693147181 |
|
| Nautical Mile (International) |
1852 |
m |
| Nautical Mile (UK) |
1853.18 |
m |
| Neutron Compton Wavelength |
1.31959E-15 |
m |
| Neutron g-Factor |
-3.82608545 |
|
| Neutron Gyromagnetic Ratio |
183247188 |
/s/T |
| Neutron Gyromagnetic Ratio |
29.1646958 |
MHz/T |
| Neutron Magnetic Moment |
-9.66236E-27 |
J/T |
| Neutron Magnetic Moment |
-0.001041876 |
|
| Neutron Magnetic Moment |
-1.91304272 |
|
| Neutron Mass |
1.67493E-27 |
kg |
| Neutron Mass |
1.008664916 |
u |
| Neutron Mass |
1.50535E-10 |
J |
| Neutron Molar Mass |
0.001008665 |
kg/mol |
| Neutron to Shielded Proton Magnetic Moment Ratio (H2O- sphere- 25°C) |
-0.68499694 |
|
| Neutron-Electron Magnetic Moment Ratio |
0.001040669 |
|
| Neutron-Electron Mass Ratio |
1.838683655 |
|
| Neutron-Muon Mass Ratio |
8.89248478 |
|
| Neutron-Proton Magnetic Moment Ratio |
-0.68497934 |
|
| Neutron-Proton Mass Ratio |
1.001378419 |
|
| Neutron-Tau Mass Ratio |
0.528722 |
|
| Newtonian Constant of Gravitation |
6.673E-11 |
m^3 kg-1 s-1 |
| Newtonian Constant of Gravitation |
6.707E-39 |
(GeV/c2)-2 |
| Nife Cell (emf) |
1.4 |
V |
| Niven's Constant |
1.70521114 |
|
| Nuclear Magneton |
5.05078E-27 |
J T-1 |
| Nuclear Magneton |
3.15245E-08 |
eV T-1 |
| Nuclear Magneton |
7.62259396 |
MHz T-1 |
| Number (Gold) |
1.618033989 |
|
| Ounce (Apothecaries) |
0.031103477 |
kg |
| Ounce (Avoirdupois) |
0.028349523 |
kg |
| Ounce (Avoirdupois) |
0.0625 |
lb (av.) |
| Ounce (Avoirdupois) |
16 |
drachms (av.) |
| Ounce (Troy) |
31.103 |
g |
| Paraffin (Refractive Index) |
1.42 |
|
| Permeability of Free Space |
1.25664E-06 |
H/m |
| Permittivity of Free Space |
8.85419E-12 |
F/m |
| Pi |
3.141592654 |
|
| Pint (Dry US) |
0.00055061 |
m^3 |
| Pint (Imperial) |
0.0005682 |
m^3 |
| Pint (Liquid US) |
0.0004731 |
m^3 |
| Planck Constant (h) |
6.62607E-34 |
J s |
| Planck Constant (h) |
4.13567E-15 |
eV s |
| Planck Constant (h/2p) |
1.05457E-34 |
J s |
| Planck Constant (h bar) |
6.58212E-16 |
eV s |
| Planck Constant (Molar) |
3.99031E-10 |
J s/mol |
| Planck Constant (Molar) |
0.119626565 |
J m/mol |
| Planck Length |
1.616E-35 |
m |
| Planck Mass |
2.1767E-08 |
kg |
| Planck Time |
5.3906E-44 |
s |
| Porter's Constant |
1.467078079 |
|
| Pounds per Acre |
0.112 |
g/m^2 |
| Pounds per Foot |
1.488 |
kg/m |
| Pounds per Inch |
17.85 |
kg/m |
| Pounds per Square Foot |
4882 |
g/m^2 |
| Pounds per Square Inch |
703000 |
g/m^2 |
| Pounds per Yard |
0.496 |
kg/m |
| Pressure (Atmospheric) |
101325 |
N/m^2 |
| Pressure (Atmospheric) |
1.01325 |
bar |
| Pressure (Atmospheric) |
14.7 |
lbf in-2 |
| Proton Charge to Mass Quotient |
95788340.8 |
C/kg |
| Proton Compton Wavelength h/mpc |
1.32141E-15 |
m |
| Proton g-Factor |
5.585694675 |
|
| Proton Gyromagnetic Ratio |
267522212 |
s-1 T-1 |
| Proton Gyromagnetic Ratio |
42.5774825 |
MHz/T |
| Proton Magnetic Moment |
1.41061E-26 |
J/T |
| Proton Magnetic Moment |
0.001521032 |
|
| Proton Magnetic Moment |
2.792847337 |
|
| Proton Magnetic Moment (Shielded H2O- sphere- 25°C) |
1.41057E-26 |
J/T |
| Proton Mass |
1.67262E-27 |
kg |
| Proton Mass |
1.007276467 |
u |
| Proton Mass |
1.50328E-10 |
J |
| Proton Molar Mass |
0.001007276 |
kg/mol |
| Proton-Electron Mass Ratio |
1836.152668 |
|
| Proton-Muon Mass Ratio |
8.88024408 |
|
| Proton-Neutron Magnetic Moment Ratio |
-1.45989805 |
|
| Proton-Neutron Mass Ratio |
0.998623479 |
|
| Proton-Tau Mass Ratio |
0.527994 |
|
| Pythagoras' Constant |
1.414213562 |
|
| Quantized Hall Conductance |
3.87405E-05 |
S |
| Quantized Hall Resistance |
25812.8056 |
|
| Quantum of Circulation |
0.000363695 |
m^2/s |
| h/me |
0.00072739 |
m^2/s |
| Quantum Conductance |
7.74809E-05 |
S |
| Quantum Inverse Conductance |
12906.40379 |
Ohm |
| Quantum Magnetic Flux |
2.06783E-15 |
Wb |
| Radiation Constant (Second) |
0.014387752 |
m K |
| Ramanujan-Soldner Constant |
1.451369235 |
|
| Refractive Index of Glass |
1.5 |
|
| Refractive Index of Paraffin |
1.42 |
|
| Refractive Index of Water |
1.33 |
|
| Residual Entropy For Square Ice |
1.539600718 |
|
| Resistance Quantized Hall RH |
25812.8056 |
Ohm |
| Rydberg Constant |
10973731.57 |
m-1 |
| Rydberg Constant |
3.28984E+15 |
Hz |
| Rydberg Constant |
2.17987E-18 |
J |
| Rydberg Number (Hydrogen) |
10967758 |
m-1 |
| Sackur-Tetrode Constant |
-1.1517048 |
|
| Sackur-Tetrode Constant |
-1.1648678 |
|
| Second Radiation Constant |
0.014387752 |
m K |
| Self-Numbers Density Constant |
0.252660259 |
|
| Shapiro's Cyclic Sum Constant |
0.4945668 |
|
| Short Hundredweight (US) |
4.535e4 g |
|
| Short Ton |
907100 |
g |
| Short Ton |
2000 |
lb |
| Siegbahn Unit |
1.00021E-13 |
m |
| Sierpinski's Constant |
2.58498176 |
|
| Sigma |
1E+12 |
m |
| Siriometre |
1.49598E+15 |
m |
| Siriusweit |
1.54284E+17 |
m |
| Slug |
14.59390294 |
kg |
| Solar Constant |
1400 |
W m-2 |
| Specific Heat Capacity of Copper |
385 |
J kg-1 K-1 |
| Specific Heat Capacity of Water |
4200 |
J kg-1 K-1 |
| Specific Latent Heat of Fusion of Water |
334000 |
J kg-1 |
| Specific Latent Heat of Vapourisation of Water |
2260000 |
J kg-1 |
| Spectral Radiance (First Radiation Constant) |
1.19104E-16 |
W m^2 sr-1 |
| Speed of Light in a Vacuum |
299792458 |
m/s |
| Speed of Sound in Air at STP |
340 |
m/s |
| Square Mile |
2589000 |
m^2 |
| Square Yard |
0.8361 |
m^2 |
| Steel (Linear Expansivity) |
0.000012 |
K-1 |
| Steel (Young Modulus) |
2.1E+11 |
Pa |
| Stefan-Boltzmann Constant |
5.6704E-08 |
W m-2 K-4 |
| Sun's Energy Production |
3.9E+26 |
W |
| Sun's Mass |
1.99E+30 |
kg |
| Sun's Mean Distance From Earth |
1.495E+11 |
m |
| Sun's Mean Radius |
696000000 |
m |
| Tau Compton Wavelength |
6.977E-16 |
m |
| Tau Mass |
3.16788E-27 |
kg |
| Tau Mass |
1.90774 |
u |
| Tau Molar Mass |
0.00190774 |
kg mol-1 |
| Tau-Electron Mass Ratio |
3477.48 |
|
| Tau-Muon Mass Ratio |
16.8188 |
|
| Tau-Neutron Mass Ratio |
1.89135 |
|
| Tau-Proton Mass Ratio |
1.89396 |
|
| Thermal Conductivity of Copper |
385 |
W m-1 K-1 |
| Thermal Conductivity of Glass |
1 |
W m-1 K-1 |
| Thomson Cross Section |
6.65246E-29 |
m^2 |
| Ton |
106 |
kg |
| Ton Short |
907100 |
g |
| Ton UK per 1000yd |
1.111 |
kg/m |
| Ton UK per Mile |
0.6313 |
kg/m |
| Troy Ounce |
31.103 |
g |
| Vallée's Constant |
0.199458818 |
|
| Van der Corput's Constant |
3.364317578 |
|
| Verdet's Constant (Light at 589nm in water) |
0.000477 |
rad/A |
| Viscosity of Air at 20°C |
0.000018 |
N s/m^2 |
| Viscosity of Water at 20°C |
0.001002 |
N s/m^2 |
| von Klitzing Constant |
25812.80757 |
Ohm |
| Water (Refractive Index) |
1.33 |
|
| Water (Specific Heat Capacity) |
4200 |
J/kg/K |
| Water (Specific Latent Hear of Vapourisation) |
2260000 |
J/kg |
| Water (Specific Latent Heat of Fusion) |
334000 |
J/kg |
| Water (Viscosity 20°C) |
0.001002 |
N s/m^2 |
| Wavelength of Electron Compton |
2.42631E-12 |
m |
| Weak Mixing Angle |
0.2224 |
|
| Weston Cell emf |
1.0186 |
V |
| Wien Displacement Law Constant |
0.002897769 |
m K |
| Wilbraham-Gibbs Constant |
1.851937052 |
|
| Young Modulus for Copper |
1.3E+11 |
Pa |
| Young Modulus for Steel |
2.1E+11 |
Pa |
| Zero Absolute |
-273.15 |
°C |