The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
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conventional value of watt-90
 $W_{90} = (K^2_{{\rm J}-90}R_{{\rm K}-90}/K^2_{\rm J}R_{\rm K})\,{\rm W}$
 Numerical value  1.000 000 195 53... W
 Standard uncertainty  (exact)
  Relative standard uncertainty  (exact)
 Concise form  1.000 000 195 53... W    
 
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

 
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