Blood Alcohol unit converter

Convert blood alcohol between mg/dL, g/dL, g/L and mmol/L. 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 mg/dL = 0.001 g/dL. Nothing you type here leaves your browser.

The conversion

1 mg/dL = 0.001 g/dLFrom mg/dL to g/dL: divide by 1,000. Back again: multiply by 1,000.
1 mg/dL = 0.01 g/LFrom mg/dL to g/L: divide by 100. Back again: multiply by 100.
1 mg/dL = 0.2171 mmol/LFrom mg/dL to mmol/L: divide by 4.607. Back again: multiply by 4.607.

Mass and molar units are linked by the molecular weight: 46.07 g/mol (Ethanol, C2H6O). Source: PubChem (National Library of Medicine).

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

Blood Alcohol values in mg/dL, g/dL, g/L and mmol/L
mg/dL	g/dL	g/L	mmol/L
2	0.002	0.02	0.4
4	0.004	0.04	0.9
6	0.006	0.06	1.3
8	0.008	0.08	1.7
10	0.01	0.1	2.2
12	0.012	0.12	2.6
14	0.014	0.14	3
16	0.016	0.16	3.5
18	0.018	0.18	3.9
20	0.02	0.2	4.3

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

Usual ranges for Blood Alcohol in mg/dL, g/dL, g/L and mmol/L
Who	mg/dL	g/dL	g/L	mmol/L
Adults	up to 10	up to 0.01	up to 0.1	up to 2.2