The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
Topics:
Values
Energy
Equivalents
Searchable
Bibliography
Background

Constants
Bibliography

Constants,
Units &
Uncertainty
home page
[skip navigation]
Click equation to show only symbol
kilogram-atomic mass unit relationship
 $  1\,{\rm kg} = ({\rm kg}/m_{\rm u}) \, {\rm u} $
 Numerical value  6.022 140 7621 x 1026 u
 Standard uncertainty  0.000 000 0018 x 1026 u
  Relative standard uncertainty  3.0 x 10-10
 Concise form  6.022 140 7621(18) x 1026 u    
 
Click here for correlation coefficient of this constant with other constants
Source: 2018 CODATA     
recommended values
 
Definition of
uncertainty
 
     Correlation coefficient with
any other constant

 
Go to a new search