Blood count

Hemoglobin unit converter

Oxygen-carrying protein in blood (mmol/L counts heme units)

Also known as: Haemoglobin, Hb, Hgb, Hémoglobine, Hemoglobina, Emoglobina

Converter

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

mmol/L g/dL g/L µmol/L

Worked example

146.5 g/L (middle of the reference range) = 9.09 mmol/L

Conversion formulas

mmol/L	mmol/L = g/L × 0.06207	g/L = mmol/L × 16.11
g/dL	g/dL = g/L × 0.1	g/L = g/dL × 10
µmol/L	µmol/L = g/L × 62.06	g/L = µmol/L × 0.01611

Reference range

Unit	Adults	Men	Women
mmol/L	7.511 – 10.68	8.566 – 10.68	7.511 – 9.373
g/dL	12.1 – 17.2	13.8 – 17.2	12.1 – 15.1
g/L	121 – 172	138 – 172	121 – 151
µmol/L	7509 – 10 674	8564 – 10 674	7509 – 9370

Source: MedlinePlus (NLM): Hemoglobin · Last reviewed: 2026-10-14

Note from the source: Adults: men 13.8-17.2 g/dL (138-172 g/L), women 12.1-15.1 g/dL (121-151 g/L) (MedlinePlus)

Frequently asked questions

How do I convert Hemoglobin from g/L to mmol/L?

mmol/L = g/L × 0.06207. In the other direction: g/L = mmol/L × 16.11.

What is the reference range of Hemoglobin?

For adults the range is 121 – 172 g/L (MedlinePlus (NLM): Hemoglobin). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Hemoglobin?

Common units are mmol/L, g/dL, g/L, µmol/L.