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carat (karat)
Symbol:  ct, Kt 
Category:  Fraction 
SI Equivalent:  4.16667×10-2 
Dimension nil (fraction) 
System:  INT 
 
Notes
Commonly used in the precious metal industry, it corresponds to the mass fraction of gold in precious alloys used in jewelry.
1 carat = 1/24
Convert     ct, Kt  
1 ct, Kt =
Fraction
  Symbol Unit Name
4.16667×107  ppb  part per billion 
4.16667  pph, %  part per hundred 
4.16667×106  pphm  part per hundred million 
4166.67  ppht  part per hundred thousand 
4.16667×104  ppm  part per million 
4.16667×1013  ppq  part per quadrillion 
4.16667×1010  ppt  part per tera 
41.6667  ppt  part per thousand 
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