Serum Iron Unit Converter

In short Serum Iron is reported in µg/dL in some countries and µmol/L in others, and the two are related by a fixed factor: 1 µg/dL = 0.179067 µmol/L, so to go the other way you divide by 5.5845. 60 µg/dL is 10.7 µmol/L; 100 µg/dL is 17.9 µmol/L; 170 µg/dL is 30.4 µmol/L. The factor is not arbitrary — it comes from the molar mass, because iron has an atomic mass of 55.845 g/mol, and that is why every analyte has its own factor rather than one shared conversion. Note the conventional unit is µg/dL, not mg/dL — there is far less iron in serum than glucose, and using mg/dL by mistake shifts the answer by a factor of a thousand. The same factor applies to total iron-binding capacity, which is reported in the same units and is often on the same line of the report. 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.