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part per tera
Symbol:  ppt 
Category:  Fraction 
SI Equivalent:  10×10-13 
Dimension nil (fraction) 
System:  INT 
 
Notes
1 ppt = 10-12
Convert     ppt  
1 ppt =
Fraction
  Symbol Unit Name
2.4×10-11  ct, Kt  carat (karat) 
1×10-3  ppb  part per billion 
1×10-10  pph, %  part per hundred 
1×10-4  pphm  part per hundred million 
1×10-7  ppht  part per hundred thousand 
10×10-7  ppm  part per million 
1000  ppq  part per quadrillion 
10×10-10  ppt  part per thousand 
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