The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Constants,
Units &
Uncertainty
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  Conversion from kg to Hz  
Conversion equation:  (1 kg)c2/h = x Hz
x = {c2/h}
 
  Value of conversion factor:  x = 1.356 392 489... x 1050  
Your input value:  1.000 000 000 000 00... kg 
 Your converted value:  1.356 392 489 652 13... x 1050 Hz 
 
Note: {Q} is the numerical value of Q when Q is expressed in SI units
 
Source: 2018 CODATA     
recommended values
 
Definition of
uncertainty
 
     Basis of conversion factors
for energy equivalents

 

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