Conversion Factors    
       
 
  
DEPARTMENT OF CLINICAL BIOCHEMISTRY
CHRISTIAN MEDICAL COLLEGE, VELLORE-4
CMC EXTERNAL QUALITY ASSURANCE SCHEME (EQAS)
CONVERSION FACTORS FOR THE HORMONES
 
Dear Participant,
      Some labs report hormone results by conventional units and others by SI units. Herewith we give the list of conversion factors needed, if you are reporting in units other than what is used in the CMC EQAS. Please check for the units and do the necessary conversion if needed, before entering the results. If not the VIS score will go wrong.
 
Hormone If you are reporting Conversion factor CMC EQAS
  by SI Unit  (divide by)  Reporting Unit
  Total Thyroxine     nmol/L 12.87 ug/dL
  Free T4     pmol/L 12.87 ng/dL
  TSH     mIU/mL 1.0 mIU/mL
  T3     nmol/L 0.0154 ng/dL
  Cortisol     nmol/L 27.59 ug/dL
  LH     IU/L 1.0 mIU/mL
  FSH     IU/L 1.0 mIU/mL
  Prolactin     pmol/L 43.47 ng/mL
  Testosterone     nmol/L 0.0347 ng/dL
  HCG     IU/L 1.0 mIU/mL
  *Estradiol     pmol/L 1.0 pmol/L
  *Progesterone     nmol/L 1.0 nmol/L
  Alpha Fetoprotein     ng/ml 1.21 IU/mL
  Free ß HCG     IU/L 1.0 ng/mL
  PAPPA     mg/L 4.5 mIU/mL
 
           *Estradiol          pg/mL x 3.67 = pmol/L
           *Progesterone  ng/mL x 3.18  = nmol/L
 
           1 L    = 1000 mL  100 mL      = 1dL
           1G    = 1000 mg ( milli)  1 M (mole) = 1000 mmol
           1 mg = 1000 ug (micro)  1 mmol       = 1000umol
           1 ug  = 1000 ng (nano)  1 umol        = 1000nmol
           1 ng  = 1000 pg (pico)  1 nmol        = 1000 pmol
 
 
 
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