Lactate unit converter

Convert lactate between mmol/L and mg/dL. Type in either box. The factors come from our catalog and are checked by code.

AI-verified against cited sources. Awaiting expert reviewLast reviewed 2026-10-03

From

1 mmol/L = 9.009 mg/dL. Nothing you type here leaves your browser.

The conversion

1 mmol/L = 9.009 mg/dLFrom mmol/L to mg/dL: multiply by 9.009. Back again: divide by 9.009.

Mass and molar units are linked by the molecular weight: 90.08 g/mol (lactic acid (C3H6O3); the lactate ion is about 89.07). Source: PubChem (U.S. National Library of Medicine).

Common values

From zero to about twice the usual upper limit, plus the usual limits themselves.

Lactate values in mmol/L and mg/dL
mmol/L	mg/dL
0.5	4.5
1	9
1.5	13.5
2	18
2.5	22.5
3	27
3.5	31.5
4	36

Usual ranges in each unit

What labs print as the reference range, by who was tested. Sources for each range are on the Lactate page.

Usual ranges for Lactate in mmol/L and mg/dL
Who	mmol/L	mg/dL
18+	0.5–2	4.5–18
under 0.25	up to 3.3	up to 29.7
0.25–1.08	up to 3.1	up to 27.9
2.08–17	up to 2.2	up to 19.8