Blood gases & acid-base

Lactate unit converter

Lactic acid (muscle and metabolism marker)

Also known as: Lactic acid, Blood lactate, Milchsäure, Acide lactique, Lactatémie, Lactato

Converter

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

mmol/L mg/dL g/L mg/L µmol/L

Worked example

1.35 mmol/L (middle of the reference range) = 12.2 mg/dL

Conversion formulas

mg/dL	mg/dL = mmol/L × 9.009	mmol/L = mg/dL × 0.111
g/L	g/L = mmol/L × 0.09008	mmol/L = g/L × 11.1
mg/L	mg/L = mmol/L × 90.08	mmol/L = mg/L × 0.0111
µmol/L	µmol/L = mmol/L × 1000	mmol/L = µmol/L × 0.001

Reference range

Unit	Adults
mmol/L	0.5 – 2.2
mg/dL	4.505 – 19.82
g/L	0.045 – 0.1982
mg/L	45.04 – 198.2
µmol/L	500 – 2200

Source: MedlinePlus (NLM): Lactic acid test · Last reviewed: 2026-10-14

Note from the source: 4.5-19.8 mg/dL (0.5-2.2 mmol/L) (MedlinePlus)

Frequently asked questions

How do I convert Lactate from mmol/L to mg/dL?

mg/dL = mmol/L × 9.009. In the other direction: mmol/L = mg/dL × 0.111.

What is the reference range of Lactate?

For adults the range is 0.5 – 2.2 mmol/L (MedlinePlus (NLM): Lactic acid 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 Lactate?

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