A1C of 7% is an average glucose of 154 mg/dL

Estimated average glucose at A1C 7%

154 mg/dL

In mmol/L: 8.5 mmol/L
A1C entered: 7.0%
ADA range: the range the ADA uses to diagnose diabetes

7.0% translates to an average glucose of about 154 mg/dL, which is 8.5 mmol/L in the units used across the UK, Australia and Canada. The IFCC equivalent of the A1C itself is close to 53 mmol/mol.

This is within the range the ADA uses to diagnose diabetes. The conversion below tells you what average glucose it corresponds to. It does not tell you what to do, and it cannot see the rest of your chart.

A1C 7.0% is a glycemic target the ADA suggests for many non-pregnant adults with diabetes, while explicitly individualising that goal by age, coexisting conditions and hypoglycaemia risk. It converts to an estimated average glucose of 154 mg/dL, one of the anchor rows in the published ADA table.

Step up one tenth and the estimate moves by around 3 mg/dL: 7.1% gives about 157 mg/dL. Since a certified assay may itself vary by roughly 0.5 percentage points, a single tenth of movement between two tests is not really movement.

Time spent in range and time spent high or low are separate questions from the average, and they matter clinically in ways an average cannot capture.

The window is rolling rather than fixed, so an A1C taken today and one taken a month from now overlap substantially in the period they describe.

Repeat testing exists because of this. The ADA asks for confirmation before diagnosing precisely because one measurement of anything, including this one, carries error worth ruling out.

The genuinely useful question is not what this single value means but how it compares with your previous one, and whether that difference is bigger than the measurement tolerance.

Convert a different A1C value

A1C to estimated average glucose, 6.5% to 7.5%
A1C	eAG (mg/dL)	eAG (mmol/L)
6.5%	140 mg/dL	7.8 mmol/L
6.6%	143 mg/dL	7.9 mmol/L
6.7%	146 mg/dL	8.1 mmol/L
6.8%	148 mg/dL	8.2 mmol/L
6.9%	151 mg/dL	8.4 mmol/L
7.0%	154 mg/dL	8.5 mmol/L
7.1%	157 mg/dL	8.7 mmol/L
7.2%	160 mg/dL	8.9 mmol/L
7.3%	163 mg/dL	9 mmol/L
7.4%	166 mg/dL	9.2 mmol/L
7.5%	169 mg/dL	9.4 mmol/L

Computed with eAG (mg/dL) = 28.7 x A1C - 46.7 (Nathan 2008). mmol/L is derived from mg/dL using the glucose factor 18.0182.

Estimated average glucose (ADAG / Nathan) — eAG (mg/dL) = 28.7 x A1C - 46.7. Verified 2026-07-30 against Nathan et al., Diabetes Care 2008 (ADAG study) (A population regression: in the ADAG study, individuals at the same A1C had meaningfully different mean glucose. The A1C assay itself carries about +/- 0.5 percentage points under NGSP certification.)

Official sources

Nathan DM et al., Translating the A1C Assay Into Estimated Average Glucose Values, Diabetes Care 2008 — The ADAG study that produced the eAG equation used on this page.
American Diabetes Association — Standards of Care in Diabetes — Where the A1C ranges quoted here are defined.
NGSP — A1C assay standardisation and certification criteria — Why two lab results half a point apart can mean nothing changed.

Frequently asked questions

7.0% A1C is what in average glucose?

Around 154 mg/dL — 8.5 mmol/L if your readings use that scale. The conversion for 7.0% comes from the ADAG study regression published in 2008.

Is 7.0% inside the ADA prediabetes range?

The ADA describes 7.0% as the range the ADA uses to diagnose diabetes. That is a definition of a numeric range rather than a diagnosis: the ADA asks clinicians to confirm results with a repeat test and to read them alongside your history.

How precise is the 154 mg/dL figure?

The conversion is exact arithmetic, but it is a population average: in the ADAG study, individuals at the same A1C had meaningfully different mean glucose. The assay itself also carries about half a percentage point of tolerance.

What should I ask my clinician about 7.0%?

Useful questions are what this figure is expected to do next, when it will be re-measured, and whether anything in your history affects how it should be read.

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