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 symbol for equation
proton mass in u
 $m_{\rm p}$
 Numerical value  1.007 276 466 5789 u
 Standard uncertainty  0.000 000 000 0083 u
  Relative standard uncertainty  8.3 x 10-12
 Concise form  1.007 276 466 5789(83) u    
 
Click here for correlation coefficient of this constant with other constants
Source: 2022 CODATA     
recommended values 		 Definition of
uncertainty 		      Correlation coefficient with
any other constant

 
Go to a new search