Iron & vitamins

Iron unit converter

Serum iron level

Also known as: Fe, Serum iron, Serumeisen, Fer sérique, Sidérémie, Hierro

Converter

Enter a value in any unit and all other units fill in.

µmol/L µg/dL mg/L µg/L

Worked example

17.45 µmol/L (middle of the reference range) = 97.4 µg/dL

Conversion formulas

µg/dL	µg/dL = µmol/L × 5.583	µmol/L = µg/dL × 0.1791
mg/L	mg/L = µmol/L × 0.05585	µmol/L = mg/L × 17.91
µg/L	µg/L = µmol/L × 55.85	µmol/L = µg/L × 0.01791

Reference range

Unit	Adults	Men	Women
µmol/L	6.6 – 28.3	10.6 – 28.3	6.6 – 25.9
µg/dL	36.85 – 158	59.18 – 158	36.85 – 144.6
mg/L	0.3686 – 1.581	0.592 – 1.581	0.3686 – 1.446
µg/L	368.6 – 1581	592 – 1581	368.6 – 1447

Source: MedlinePlus (NLM): Iron blood test · Last reviewed: 2026-10-14

Note from the source: Men 59-158 µg/dL (10.6-28.3 µmol/L), women 37-145 µg/dL (6.6-25.9 µmol/L) (MedlinePlus)

Frequently asked questions

How do I convert Iron from µmol/L to µg/dL?

µg/dL = µmol/L × 5.583. In the other direction: µmol/L = µg/dL × 0.1791.

What is the reference range of Iron?

For adults the range is 6.6 – 28.3 µmol/L (MedlinePlus (NLM): Iron blood test). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Iron?

Common units are µmol/L, µg/dL, mg/L, µg/L.