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PTH Conversion Calculator

Enter a PTH value and pick the conversion direction.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

Parathyroid hormone (PTH) is an 84-amino-acid peptide secreted by the parathyroid glands that raises blood calcium by mobilizing it from bone, increasing renal reabsorption, and activating vitamin D — its level is a key test in diagnosing hyperparathyroidism, hypoparathyroidism, and chronic kidney disease-related bone disorders. Labs report it in either mass units (pg/mL) or molar units (pmol/L) depending on the country and assay, which makes unit confusion a real risk when comparing results across labs.

The conversion uses PTH's molecular weight of roughly 9,400 daltons, giving the factor 1 pg/mL = 0.106 pmol/L (equivalently, 1 pmol/L ≈ 9.43 pg/mL). This calculator converts a PTH value in either direction so results from different reference ranges can be compared directly; as with any lab-value tool, it is informational only and not a substitute for a clinician's interpretation.

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