 | From:  http://physics.nist.gov/constants
 |
 | Source: Peter J. Mohr and Barry N. Taylor, CODATA Recommended Values of the
 |         Fundamental Physical Constants: 2002, published in Rev. Mod. Phys.
 |         vol. 77(1) 1-107 (2005).
 |
 |
 | Quantity                                               Value                 Uncertainty          Unit
 | """
       299 792 458 | speed of light in vacuum                       
          12.566 370 614e-7 | magnetic constant                              
       8.854 187 817e-12 | electric constant                              
       376.730 313 461 | characteristic impedance of vacuum             
       6.6742e-11 | Newtonian constant of gravitation              
       6.7087e-39 | Newtonian constant of gravitation over h-bar c 
       6.626 0693e-34 | Planck constant                                
       4.135 667 43e-15 | Planck constant in eV s                        
       197.326 968 | Planck constant over 2 pi times c in MeV fm    
       1.054 571 68e-34 | Planck constant over 2 pi                      
       6.582 119 15e-16 | Planck constant over 2 pi in eV s              
       2.176 45e-8 | Planck mass                                    
       1.416 79e32 | Planck temperature                             
       1.616 24e-35 | Planck length                                  
       5.391 21e-44 | Planck time                                    
       1.602 176 53e-19 | elementary charge                              
       2.417 989 40e14 | elementary charge over h                       
       2.067 833 72e-15 | magnetic flux quantum                             
       7.748 091 733e-5 | conductance quantum                            
       12 906.403 725 | inverse of conductance quantum                 
       483 597.879e9 | Josephson constant                             
       25 812.807 449 | von Klitzing constant                          
       927.400 949e-26 | Bohr magneton                                  
       5.788 381 804e-5 | Bohr magneton in eV/T                          
       13.996 2458e9 | Bohr magneton in Hz/T                          
       46.686 4507 | Bohr magneton in inverse meters per tesla      
       0.671 7131 | Bohr magneton in K/T                           
       5.050 783 43e-27 | nuclear magneton                               
       3.152 451 259e-8 | nuclear magneton in eV/T                       
       7.622 593 71 | nuclear magneton in MHz/T                      
       2.542 623 58e-2 | nuclear magneton in inverse meters per tesla   
       3.658 2637e-4 | nuclear magneton in K/T                        
       7.297 352 568e-3 | fine-structure constant                        
       137.035 999 11 | inverse fine-structure constant                
       10 973 731.568 525 | Rydberg constant                               
       3.289 841 960 360e15 | Rydberg constant times c in Hz                 
       2.179 872 09e-18 | Rydberg constant times hc in J                 
       13.605 6923 | Rydberg constant times hc in eV                
       0.529 177 2108e-10 | Bohr radius                                    
       4.359 744 17e-18 | Hartree energy                                 
       27.211 3845 | Hartree energy in eV                           
       3.636 947 550e-4 | quantum of circulation                         
       7.273 895 101e-4 | quantum of circulation times 2                 
       1.166 39e-5 | Fermi coupling constant                        
       0.222 15 | weak mixing angle                              
       9.109 3826e-31 | electron mass                                  
       5.485 799 0945e-4 | electron mass in u                             
       8.187 1047e-14 | electron mass energy equivalent                
       0.510 998 918 | electron mass energy equivalent in MeV         
       4.836 331 67e-3 | electron-muon mass ratio                       
       2.875 64e-4 | electron-tau mass ratio                        
       5.446 170 2173e-4 | electron-proton mass ratio                     
       5.438 673 4481e-4 | electron-neutron mass ratio                    
       2.724 437 1095e-4 | electron-deuteron mass ratio                   
       1.370 933 555 75e-4 | electron to alpha particle mass ratio          
       -1.758 820 12e11 | electron charge to mass quotient               
       5.485 799 0945e-7 | electron molar mass                            
       2.426 310 238e-12 | Compton wavelength                             
       386.159 2678e-15 | Compton wavelength over 2 pi                   
       2.817 940 325e-15 | classical electron radius                      
       0.665 245 873e-28 | Thomson cross section                          
       -928.476 412e-26 | electron magnetic moment                          
       -1.001 159 652 1859 | electron magnetic moment to Bohr magneton ratio   
       -1838.281 971 07 | electron magnetic moment to nuclear magneton ratio
       1.159 652 1859e-3 | electron magnetic moment anomaly                  
       -2.002 319 304 3718 | electron g factor                              
       206.766 9894 | electron-muon magnetic moment ratio               
       -658.210 6862 | electron-proton magnetic moment ratio             
       -658.227 5956 | electron to shielded proton magnetic moment ratio 
       960.920 50 | electron-neutron magnetic moment ratio            
       -2143.923 493 | electron-deuteron magnetic moment ratio           
       864.058 255 | electron to shielded helion magnetic moment ratio 
       1.760 859 74e11 | electron gyromagnetic ratio                       
       28 024.9532 | electron gyromagnetic ratio over 2 pi             
       1.883 531 40e-28 | muon mass                                      
       0.113 428 9264 | muon mass in u                                 
       1.692 833 60e-11 | muon mass energy equivalent                    
       105.658 3692 | muon mass energy equivalent in MeV             
       206.768 2838 | muon-electron mass ratio                       
       5.945 92e-2 | muon-tau mass ratio                            
       0.112 609 5269 | muon-proton mass ratio                         
       0.112 454 5175 | muon-neutron mass ratio                        
       0.113 428 9264e-3 | muon molar mass                                
       11.734 441 05e-15 | muon Compton wavelength                        
       1.867 594 298e-15 | muon Compton wavelength over 2 pi              
       -4.490 447 99e-26 | muon magnetic moment                              
       -4.841 970 45e-3 | muon magnetic moment to Bohr magneton ratio       
       -8.890 596 98 | muon magnetic moment to nuclear magneton ratio    
       1.165 919 81e-3 | muon magnetic moment anomaly                      
       -2.002 331 8396 | muon g factor                                  
       -3.183 345 118 | muon-proton magnetic moment ratio                 
       3.167 77e-27 | tau mass                                       
       1.907 68 | tau mass in u                                  
       2.847 05e-10 | tau mass energy equivalent                     
       1776.99 | tau mass energy equivalent in MeV              
       3477.48 | tau-electron mass ratio                        
       16.8183 | tau-muon mass ratio                            
       1.893 90 | tau-proton mass ratio                          
       1.891 29 | tau-neutron mass ratio                         
       1.907 68e-3 | tau molar mass                                 
       0.697 72e-15 | tau Compton wavelength                         
       0.111 046e-15 | tau Compton wavelength over 2 pi               
       1.672 621 71e-27 | proton mass                                    
       1.007 276 466 88 | proton mass in u                               
       1.503 277 43e-10 | proton mass energy equivalent                  
       938.272 029 | proton mass energy equivalent in MeV           
       1836.152 672 61 | proton-electron mass ratio                     
       8.880 243 33 | proton-muon mass ratio                         
       0.528 012 | proton-tau mass ratio                          
       0.998 623 478 72 | proton-neutron mass ratio                      
       9.578 833 76e7 | proton charge to mass quotient                 
       1.007 276 466 88e-3 | proton molar mass                              
       1.321 409 8555e-15 | proton Compton wavelength                      
       0.210 308 9104e-15 | proton Compton wavelength over 2 pi            
       1.410 606 71e-26 | proton magnetic moment                            
       1.521 032 206e-3 | proton magnetic moment to Bohr magneton ratio     
       2.792 847 351 | proton magnetic moment to nuclear magneton ratio  
       5.585 694 701 | proton g factor                                
       -1.459 898 05 | proton-neutron magnetic moment ratio              
       1.410 570 47e-26 | shielded proton magnetic moment                   
  1.520 993 132e-3 | shielded proton magnetic moment to Bohr magneton ratio 
 2.792 775 604 | shielded proton magnetic moment to nuclear magneton ratio
       25.689e-6 | proton magnetic shielding correction              
       2.675 222 05e8 | proton gyromagnetic ratio                         
       42.577 4813 | proton gyromagnetic ratio over 2 pi               
       2.675 153 33e8 | shielded proton gyromagnetic ratio                
       42.576 3875 | shielded proton gyromagnetic ratio over 2 pi      
       0.8750e-15 | proton rms charge radius                       
       1.674 927 28e-27 | neutron mass                                   
       1.008 664 915 60 | neutron mass in u                              
       1.505 349 57e-10 | neutron mass energy equivalent                 
       939.565 360 | neutron mass energy equivalent in MeV          
       1838.683 6598 | neutron-electron mass ratio                    
       8.892 484 02 | neutron-muon mass ratio                        
       0.528 740 | neutron-tau mass ratio                         
       1.001 378 418 70 | neutron-proton mass ratio                      
       1.008 664 915 60e-3 | neutron molar mass                             
       1.319 590 9067e-15 | neutron Compton wavelength                     
       0.210 019 4157e-15 | neutron Compton wavelength over 2 pi           
       -0.966 236 45e-26 | neutron magnetic moment                           
       -1.041 875 63e-3 | neutron magnetic moment to Bohr magneton ratio    
       -1.913 042 73 | neutron magnetic moment to nuclear magneton ratio 
       -3.826 085 46 | neutron g factor                               
       1.040 668 82e-3 | neutron-electron magnetic moment ratio            
       -0.684 979 34 | neutron-proton magnetic moment ratio              
       -0.684 996 94 | neutron to shielded proton magnetic moment ratio  
       1.832 471 83e8 | neutron gyromagnetic ratio                        
       29.164 6950 | neutron gyromagnetic ratio over 2 pi              
       3.343 583 35e-27 | deuteron mass                                  
       2.013 553 212 70 | deuteron mass in u                             
       3.005 062 85e-10 | deuteron mass energy equivalent                
       1875.612 82 | deuteron mass energy equivalent in MeV         
       3670.482 9652 | deuteron-electron mass ratio                   
       1.999 007 500 82 | deuteron-proton mass ratio                     
       2.013 553 212 70e-3 | deuteron molar mass                            
       0.433 073 482e-26 | deuteron magnetic moment                          
       0.466 975 4567e-3 | deuteron magnetic moment to Bohr magneton ratio   
       0.857 438 2329 | deuteron magnetic moment to nuclear magneton ratio
       -4.664 345 548e-4 | deuteron-electron magnetic moment ratio           
       0.307 012 2084 | deuteron-proton magnetic moment ratio             
       -0.448 206 52 | deuteron-neutron magnetic moment ratio            
       2.1394e-15 | deuteron rms charge radius                     
       5.006 412 14e-27 | helion mass                                    
       3.014 932 2434 | helion mass in u                               
       4.499 538 84e-10 | helion mass energy equivalent                  
       2808.391 42 | helion mass energy equivalent in MeV           
       5495.885 269 | helion-electron mass ratio                     
       2.993 152 6671 | helion-proton mass ratio                       
       3.014 932 2434e-3 | helion molar mass                              
       -1.074 553 024e-26 | shielded helion magnetic moment                   
   -1.158 671 474e-3 | shielded helion magnetic moment to Bohr magneton ratio
 -2.127 497 723 | shielded helion magnetic moment to nuclear magneton ratio
  -0.761 766 562 | shielded helion to proton magnetic moment ratio        
 -0.761 786 1313 | shielded helion to shielded proton magnetic moment ratio
       2.037 894 70e8 | shielded helion gyromagnetic ratio                
       32.434 1015 | shielded helion gyromagnetic ratio over 2 pi      
       6.644 6565e-27 | alpha particle mass                            
       4.001 506 179 149 | alpha particle mass in u                       
       5.971 9194e-10 | alpha particle mass energy equivalent          
       3727.379 17 | alpha particle mass energy equivalent in MeV   
       7294.299 5363 | alpha particle-electron mass ratio             
       3.972 599 689 07 | alpha particle-proton mass ratio               
       4.001 506 179 149e-3 | alpha particle molar mass                      
       6.022 1415e23 | Avogadro constant                              
       1.660 538 86e-27 | atomic mass constant                           
       1.492 417 90e-10 | atomic mass constant energy equivalent         
       931.494 043 | atomic mass constant energy equivalent in MeV  
       96 485.3383 | Faraday constant                               
    96 485.336 | Faraday constant for conventional electric current
       3.990 312 716e-10 | molar Planck constant                          
       0.119 626 565 72 | molar Planck constant times c                  
       8.314 472 | molar gas constant                             
       1.380 6505e-23 | Boltzmann constant                             
       8.617 343e-5 | Boltzmann constant in eV/K                     
       2.083 6644e10 | Boltzmann constant in Hz/K                     
       69.503 56 | Boltzmann constant in inverse meters per kelvin
     22.413 996e-3 | molar volume of ideal gas (273.15 K, 101.325 kPa)
       2.686 7773e25 | Loschmidt constant (273.15 K, 101.325 kPa)     
       22.710 981e-3 | molar volume of ideal gas (273.15 K, 100 kPa)  
       -1.151 7047 | Sackur-Tetrode constant (1 K, 100 kPa)         
       -1.164 8677 | Sackur-Tetrode constant (1 K, 101.325 kPa)     
       5.670 400e-8 | Stefan-Boltzmann constant                      
       3.741 771 38e-16 | first radiation constant                       
       1.191 042 82e-16 | first radiation constant for spectral radiance 
       1.438 7752e-2 | second radiation constant                      
       2.897 7685e-3 | Wien displacement law constant                 
       12e-3 | molar mass of carbon-12                        
       1e-3 | molar mass constant                            
       483 597.9e9 | conventional value of Josephson constant       
       25 812.807 | conventional value of von Klitzing constant    
       101 325 | standard atmosphere                            
       9.806 65 | standard acceleration of gravity               
       1.002 077 10e-13 | Cu x unit                                      
       1.002 099 66e-13 | Mo x unit                                      
       1.000 015 09e-10 | Angstrom star                                  
       543.102 122e-12 | lattice parameter of silicon                   
       192.015 5965e-12 | {220} lattice spacing of silicon               
       12.058 8382e-6 | molar volume of silicon                        
       1.602 176 53e-19 | electron volt                                  
       1.660 538 86e-27 | unified atomic mass unit                       
       299 792 458 | natural unit of velocity                       
       1.054 571 68e-34 | natural unit of action                         
       6.582 119 15e-16 | natural unit of action in eV s                 
       9.109 3826e-31 | natural unit of mass                           
       8.187 1047e-14 | natural unit of energy                         
       0.510 998 918 | natural unit of energy in MeV                  
       2.730 924 19e-22 | natural unit of momentum                       
       0.510 998 918 | natural unit of momentum in MeV/c              
       386.159 2678e-15 | natural unit of length                         
       1.288 088 6677e-21 | natural unit of time                           
       1.602 176 53e-19 | atomic unit of charge                          
       9.109 3826e-31 | atomic unit of mass                            
       1.054 571 68e-34 | atomic unit of action                          
       0.529 177 2108e-10 | atomic unit of length                          
       4.359 744 17e-18 | atomic unit of energy                          
       2.418 884 326 505e-17 | atomic unit of time                            
       8.238 7225e-8 | atomic unit of force                           
       2.187 691 2633e6 | atomic unit of velocity                        
       1.992 851 66e-24 | atomic unit of momentum                        
       6.623 617 82e-3 | atomic unit of current                         
       1.081 202 317e12 | atomic unit of charge density                  
       27.211 3845 | atomic unit of electric potential              
       5.142 206 42e11 | atomic unit of electric field                  
       9.717 361 82e21 | atomic unit of electric field gradient         
       8.478 353 09e-30 | atomic unit of electric dipole moment          
       4.486 551 24e-40 | atomic unit of electric quadrupole moment      
       1.648 777 274e-41 | atomic unit of electric polarizablity          
       3.206 361 51e-53 | atomic unit of 1st hyperpolarizablity          
       6.235 3808e-65 | atomic unit of 2nd hyperpolarizablity          
       2.350 517 42e5 | atomic unit of magnetic flux density              
       1.854 801 90e-23 | atomic unit of magnetic dipole moment             
       7.891 036 60e-29 | atomic unit of magnetizability                 
       1.112 650 056e-10 | atomic unit of permittivity                    
       1.112 650 056e-17 | joule-kilogram relationship                    
       5.034 117 20e24 | joule-inverse meter relationship               
       1.509 190 37e33 | joule-hertz relationship                       
       7.242 963e22 | joule-kelvin relationship                      
       6.241 509 47e18 | joule-electron volt relationship               
       6.700 5361e9 | joule-atomic mass unit relationship            
       2.293 712 57e17 | joule-hartree relationship                     
       8.987 551 787e16 | kilogram-joule relationship                    
       4.524 438 91e41 | kilogram-inverse meter relationship            
       1.356 392 66e50 | kilogram-hertz relationship                    
       6.509 650e39 | kilogram-kelvin relationship                   
       5.609 588 96e35 | kilogram-electron volt relationship            
       6.022 1415e26 | kilogram-atomic mass unit relationship         
       2.061 486 05e34 | kilogram-hartree relationship                  
       1.986 445 61e-25 | inverse meter-joule relationship               
       2.210 218 81e-42 | inverse meter-kilogram relationship            
       299 792 458 | inverse meter-hertz relationship               
       1.438 7752e-2 | inverse meter-kelvin relationship              
       1.239 841 91e-6 | inverse meter-electron volt relationship       
       1.331 025 0506e-15 | inverse meter-atomic mass unit relationship    
       4.556 335 252 760e-8 | inverse meter-hartree relationship             
       6.626 0693e-34 | hertz-joule relationship                       
       7.372 4964e-51 | hertz-kilogram relationship                    
       3.335 640 951e-9 | hertz-inverse meter relationship               
       4.799 2374e-11 | hertz-kelvin relationship                      
       4.135 667 43e-15 | hertz-electron volt relationship               
       4.439 821 667e-24 | hertz-atomic mass unit relationship            
       1.519 829 846 006e-16 | hertz-hartree relationship                     
       1.380 6505e-23 | kelvin-joule relationship                      
       1.536 1808e-40 | kelvin-kilogram relationship                   
       69.503 56 | kelvin-inverse meter relationship              
       2.083 6644e10 | kelvin-hertz relationship                      
       8.617 343e-5 | kelvin-electron volt relationship              
       9.251 098e-14 | kelvin-atomic mass unit relationship           
       3.166 8153e-6 | kelvin-hartree relationship                    
       1.602 176 53e-19 | electron volt-joule relationship               
       1.782 661 81e-36 | electron volt-kilogram relationship            
       8.065 544 45e5 | electron volt-inverse meter relationship       
       2.417 989 40e14 | electron volt-hertz relationship               
       1.160 4505e4 | electron volt-kelvin relationship              
       1.073 544 171e-9 | electron volt-atomic mass unit relationship    
       3.674 932 45e-2 | electron volt-hartree relationship             
       1.492 417 90e-10 | atomic mass unit-joule relationship            
       1.660 538 86e-27 | atomic mass unit-kilogram relationship         
       7.513 006 608e14 | atomic mass unit-inverse meter relationship    
       2.252 342 718e23 | atomic mass unit-hertz relationship            
       1.080 9527e13 | atomic mass unit-kelvin relationship           
       931.494 043e6 | atomic mass unit-electron volt relationship    
       3.423 177 686e7 | atomic mass unit-hartree relationship          
       4.359 744 17e-18 | hartree-joule relationship                     
       4.850 869 60e-35 | hartree-kilogram relationship                  
       2.194 746 313 705e7 | hartree-inverse meter relationship             
       6.579 683 920 721e15 | hartree-hertz relationship                     
       3.157 7465e5 | hartree-kelvin relationship                    
       27.211 3845 | hartree-electron volt relationship             
       2.921 262 323e-8 | hartree-atomic mass unit relationship          
 |
