HbA1c 8.5% · 69 mmol/mol

HbA1c 8.5%

Converted with the published ADAG regression. What it means for you is a question for a doctor, not for this page.

Converted value

197mg/dL eAG

An HbA1c of 8.5% converts to an estimated average glucose of about 197 mg/dL — 10.9 mmol/L. In IFCC units the same result is 69 mmol/mol.

Against the American Diabetes Association criteria, 8.5% is at or above 6.5%, which is the threshold for the diabetes range. That describes where the value sits on a published scale. It is not a diagnosis, and a diagnosis requires confirmation and a doctor.

Central estimate, not a reading. The regression explained about 84% of the variation, so real averages sit either side of this figure.

SOURCE·ADAG regression, Diabetes Care 2008 · NGSP master equation·bands from ADA Standards of Care 2025·REVIEWED JUL 2026

This page is reference information, not medical advice.

Nothing here can diagnose you, and nothing here is a treatment plan. Blood glucose results are interpreted by a doctor alongside your history, your symptoms and a repeat test — a single number on a screen is not a diagnosis. If any reading concerns you, or if you feel unwell, see a doctor rather than a website.

The arithmetic behind 8.5%

The ADAG regression is applied directly: 28.7 × 8.5 − 46.7 = 197.3 mg/dL.
That figure is divided by 18.016, the molar mass of glucose in these units, giving 10.95 mmol/L.
The NGSP master equation converts the percentage to the IFCC unit: (8.5 − 2.15) × 10.929 = 69.4 mmol/mol.
Rounded for display to 197 mg/dL, 10.9 mmol/L and 69 mmol/mol — the precision laboratories report.
Nothing on this page is interpreted. Where the value sits against a published band is a fact about the band; what it means for a person is a clinical judgement.

28.7 x 8.5 - 46.7        = 197.3 mg/dL
197.3 / 18.016             = 10.95 mmol/L
(8.5 - 2.15) x 10.929   = 69.4 mmol/mol

Full methodology →

Provenance

The equations, and who published them

The regression is the ADAG equation from Diabetes Care 2008, which is the one the American Diabetes Association uses; the mmol/mol line is the NGSP master equation. Neither was adjusted here.

Source: Nathan DM, Kuenen J, Borg R, Zheng H, Schoenfeld D, Heine RJ, for the A1c-Derived Average Glucose (ADAG) Study Group. Translating the A1C assay into estimated average glucose values. Diabetes Care 2008;31(8):1473–1478. Link
Source: National Glycohemoglobin Standardization Program (NGSP) — HbA1c and estimated average glucose (eAG). Link

Neighbouring rows

Where 8.5% sits

HbA1c converted to estimated average glucose with the ADAG regression, eAG (mg/dL) = 28.7 × A1C − 46.7. The mmol/mol column is the IFCC unit, from the NGSP master equation. The final column reads the A1C against the ADA diagnostic bands.
HbA1c (%)	mmol/mol	eAG (mg/dL)	eAG (mmol/L)	Where it sits
8.0%	64	183	10.2	In the diabetes range
8.1%	65	186	10.3	In the diabetes range
8.2%	66	189	10.5	In the diabetes range
8.3%	67	192	10.6	In the diabetes range
8.4%	68	194	10.8	In the diabetes range
8.5%	69	197	10.9	In the diabetes range
8.6%	70	200	11.1	In the diabetes range
8.7%	72	203	11.3	In the diabetes range
8.8%	73	206	11.4	In the diabetes range
8.9%	74	209	11.6	In the diabetes range
9.0%	75	212	11.7	In the diabetes range

Estimated average glucose is an average across roughly the previous three months. It is not a prediction of your reading tomorrow morning, and two people with the same HbA1c can have very different day-to-day swings.

SOURCE·ADAG regression (Diabetes Care 2008) · NGSP master equation·REVIEWED JUL 2026

The complete chart from 4.0% to 14.0% →

What this page is careful not to say

It does not tell you whether 8.5% is good or bad for you, because that depends on things a web page cannot see — whether you have already been diagnosed, what else is on your report, whether you have a condition that makes HbA1c unreliable, and what your doctor is trying to achieve. It publishes no targets for anyone.

A result in this range is a reason to see a doctor and follow their advice about repeating the test — not a reason to start any diet, supplement or medicine you read about online.

PeakForm is a training and accountability programme. It is not a treatment for diabetes or prediabetes, it is not a substitute for your doctor's advice, and nothing on this site should be acted on before speaking to one.

Nearby values

8.0%183 mg/dL 8.1%186 mg/dL 8.2%189 mg/dL 8.3%192 mg/dL 8.4%194 mg/dL 8.5%197 mg/dL 8.6%200 mg/dL 8.7%203 mg/dL 8.8%206 mg/dL 8.9%209 mg/dL 9.0%212 mg/dL

Questions this report anticipates

What does an HbA1c of 8.5% mean?

On the American Diabetes Association criteria, 8.5% is at or above 6.5%, which is the threshold for the diabetes range. It converts to an estimated average glucose of about 197 mg/dL (10.9 mmol/L) using the ADAG equation. A single value is not a diagnosis — published criteria require confirmation, and interpretation belongs to a doctor.

What is 8.5% HbA1c in mg/dL?

About 197 mg/dL as an estimated average glucose across the previous two to three months, from eAG = 28.7 × 8.5 − 46.7. That is an average, not a reading you would expect to see on a meter at any particular moment.

What is 8.5% in mmol/mol?

69 mmol/mol, using the NGSP master equation (percentage − 2.15) × 10.929. Both units describe the same measurement.

General information only — NOT medical advice, and never a diagnosis. Only a doctor can interpret your results and diagnose or treat diabetes. If a reading concerns you, see a doctor rather than a website. Every threshold, equation and glycemic index value used on this site is listed with its publication on the data & method page, and every publication is listed with its issuing body and its date in the source register.

SOURCE·Published reference ranges + GI tables·REVIEWED JUL 2026

The people behind these sites

Follow the build

This site and nine others like it are built and photographed by two people: Amit Sharma — behind the build; Geeta Patel — the poses, demonstrated. New work goes up on Instagram and Facebook before it reaches a page here.

Amit Sharma @amitsharmaofficial Instagram

Geeta Patel @geetapatelnz Instagram

Geeta Patel GeetaPatelYoga Facebook

Following changes nothing here — every page stays open, with no account and no wall.