A1c 8.3%
A1c of 8.3%: what it means
An A1c of 8.3% is above the common goal of 7% and the less strict goal of 8%. It maps to an average glucose of about 192 mg/dL.
Average glucose from the ADAG formula, eAG = 28.7 × A1c − 46.7 (Nathan 2008). Categories from the ADA Standards of Care (ADA Standards 2026, sec. 2).
What an A1c of 8.3% means
- The ADA Standards of Care describe an A1c goal below 7% as appropriate for many nonpregnant adults with diabetes, as long as it can be reached without significant hypoglycemia (low blood sugar). (ADA Standards 2026, sec. 6)
- A less strict goal, such as below 8%, may be appropriate for some people, for example those with frequent or severe hypoglycemia, limited life expectancy, or advanced complications. (ADA Standards 2026, sec. 6)
- NIDDK notes that an A1c between 7% and 8%, or even higher in some cases, may be appropriate for people with long-standing diabetes who have trouble reaching a lower goal, or who cannot sense low blood sugar. (NIDDK)
- People with diabetes are generally advised to have an A1c test at least twice a year, and more often when they are not meeting their goal. (NIDDK)
Compared with an A1c of 7.0% (154 mg/dL), an A1c of 8.3% means average glucose has been about 38 mg/dL higher.
Questions to ask your doctor
- What A1c goal is right for me, and why?
- How often should my A1c be checked?
- Does my current treatment plan need to change?
- What blood sugar readings should I watch for at home, and when should I call you?
Read next: A1c goals in diabetes, A1c high but glucose normal. Lab reports in mmol/mol? Use the HbA1c mmol/mol converter.
Nearby values
| A1c | mg/dL | mmol/L | Category |
|---|---|---|---|
| 7.8% | 177 | 9.8 | Diabetes |
| 7.9% | 180 | 10.0 | Diabetes |
| 8.0% | 183 | 10.2 | Diabetes |
| 8.1% | 186 | 10.3 | Diabetes |
| 8.2% | 189 | 10.5 | Diabetes |
| 8.3% | 192 | 10.6 | Diabetes |
| 8.4% | 194 | 10.8 | Diabetes |
| 8.5% | 197 | 10.9 | Diabetes |
| 8.6% | 200 | 11.1 | Diabetes |
| 8.7% | 203 | 11.3 | Diabetes |
| 8.8% | 206 | 11.4 | Diabetes |
All values from 4.0% to 14.0% are in the A1c chart. Planning a retest? See how fast A1c can change. Over 65? See A1c by age.
Try another number
Estimated average glucose (eAG) = 28.7 × A1c − 46.7, from the ADAG study. mmol/L = mg/dL ÷ 18.016. Real averages vary from person to person at the same A1c. This is a conversion, not a diagnosis.
Other key numbers
6.5 mmol/L
6.6 mmol/L
6.8 mmol/L
7.0 mmol/L
7.1 mmol/L
7.3 mmol/L
7.4 mmol/L
7.6 mmol/L
7.8 mmol/L
8.6 mmol/L
9.4 mmol/L
10.2 mmol/L
10.9 mmol/L
11.7 mmol/L
13.3 mmol/L
14.9 mmol/L
16.5 mmol/L
Sources
- Nathan DM, Kuenen J, Borg R, Zheng H, Schoenfeld D, Heine RJ; A1c-Derived Average Glucose (ADAG) Study Group. Translating the A1C assay into estimated average glucose values. Diabetes Care. 2008;31(8):1473-1478. doi.org/10.2337/dc08-0545
- American Diabetes Association Professional Practice Committee. 2. Diagnosis and Classification of Diabetes: Standards of Care in Diabetes 2026. Diabetes Care. 2026;49(Suppl 1). doi.org/10.2337/dc26-S002
- American Diabetes Association Professional Practice Committee. 6. Glycemic Goals, Hypoglycemia, and Hyperglycemic Crises: Standards of Care in Diabetes 2026. Diabetes Care. 2026;49(Suppl 1). doi.org/10.2337/dc26-S006
- National Institute of Diabetes and Digestive and Kidney Diseases (NIH). The A1C Test & Diabetes. www.niddk.nih.gov/health-information/diagnostic-tests/a1c-test
Written and maintained by the controla1clevels.com editorial team. We do not have a medical reviewer; every claim links to its primary source above. Last reviewed: 2026-10-27. Spotted an error? See About.