Testosterone — nmol/L to ng/dL

In short To convert total testosterone from nmol/L to ng/dL, multiply by 28.8431 — so one nmol/L is 28.8431 ng/dL, and one ng/dL is 0.0346703 nmol/L. 300 ng/dL is 10.4 nmol/L; 500 ng/dL is 17.3 nmol/L; 1000 ng/dL is 34.7 nmol/L. The factor comes from the molar mass, because testosterone has a molar mass of 288.43 g/mol; that is why it differs for every analyte and why a single "lab unit converter" factor does not exist. The two systems differ by roughly a factor of 29, which is large enough that the numbers can never be confused — but note this is *total* testosterone. Free testosterone is a different measurement reported in pg/mL or pmol/L, with its own factor, and the two are not interchangeable however carefully the units are converted. This converts units. It does not interpret results, does not compare your value against a reference interval, and is not a substitute for the clinician who ordered the test — reference intervals differ between laboratories, methods and populations.