OGTT 1-Hour Glucose unit converter

Convert OGTT 1-Hour glucose between mg/dL, mmol/L and g/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 = 0.0555 mmol/L. Nothing you type here leaves your browser.

The conversion

1 mg/dL = 0.05551 mmol/LFrom mg/dL to mmol/L: divide by 18.02. Back again: multiply by 18.02.
1 mg/dL = 0.01 g/LFrom mg/dL to g/L: divide by 100. Back again: multiply by 100.

Mass and molar units are linked by the molecular weight: 180.16 g/mol (D-glucose, C6H12O6 (PubChem CID 5793)). Source: PubChem, National Library of Medicine.

Common values

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

OGTT 1-Hour Glucose values in mg/dL, mmol/L and g/L
mg/dL	mmol/L	g/L
50	2.8	0.5
100	5.6	1
150	8.3	1.5
155	8.6	1.55
200	11.1	2
209	11.6	2.09
250	13.9	2.5
300	16.7	3
350	19.4	3.5
400	22.2	4

Usual ranges in each unit

What labs print as the reference range, by who was tested. Sources for each range are on the OGTT 1-Hour Glucose page.

Usual ranges for OGTT 1-Hour Glucose in mg/dL, mmol/L and g/L
Who	mg/dL	mmol/L	g/L
Women, pregnancy t2	up to 179	up to 9.9	up to 1.79
Women, pregnancy t3	up to 179	up to 9.9	up to 1.79