What A1c level is considered diabetes?
An HbA1c of 6.5 percent (48 mmol/mol) or higher on two tests is the usual threshold for diabetes. 5.7 to 6.4 percent counts as prediabetes, and below 5.7 is normal.
The test averages roughly three months of blood sugar, which is why doctors trust it more than a single fasting reading. Anemia and some blood conditions can skew it slightly.
Prediabetes is the finding worth acting on hardest: weight loss, walking after meals and better sleep reverse it in a large share of people. Diabetes is far easier to prevent than to cure.
Source: American Diabetes Association, Standards of Care in Diabetes
See a doctor promptly if
- Excessive thirst, passing large amounts of urine, blurred vision or unexplained weight loss. These suggest blood sugar is already well above the prediabetes range
- Nausea, vomiting, abdominal pain, deep rapid breathing or a fruity smell on the breath: go to an emergency department
- A random blood glucose of 200 mg/dL (11.1 mmol/L) or higher, or a fasting glucose of 126 mg/dL (7.0 mmol/L) or higher
- New numbness, burning or pins and needles in both feet
- A wound on the foot that is not healing, or a skin or genital infection that keeps returning
HbA1c, in both units
| Result | In short | What it means |
|---|---|---|
| Below 5.7% (below 39 mmol/mol) | Normal | No action beyond the screening interval for your age and risk factors. |
| 5.7 to 6.0% (39 to 42 mmol/mol) | Prediabetes, lower end | The window where change works best. Weight, movement and what is on the plate move this number measurably within months. |
| 6.1 to 6.4% (43 to 47 mmol/mol) | Prediabetes, upper end | Still reversible for many people, and the point at which a structured programme or a medicine conversation is reasonable. |
| 6.5 to 6.9% (48 to 52 mmol/mol) | Diabetes range | The diagnostic threshold in every major guideline, normally confirmed on a second test. Caught here it is usually very manageable. |
| 7.0 to 7.9% (53 to 63 mmol/mol) | Above target for most | 7.0% is the common treatment target, though the right target differs by age and by what else is going on. |
| 8.0 to 9.9% (64 to 85 mmol/mol) | Well above target | Worth a proper review of treatment rather than another few months of waiting. |
| 10% and above (86 mmol/mol and above) | See a doctor promptly | Needs attention now. With thirst, weight loss, blurred vision or a lot of passing urine, it needs it today. |
One result is a snapshot. Ranges differ a little between labs, and what a number means depends on the rest of you. Check it against the guidelines.
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Answered by the AskDoc Medical Team · Medically reviewed under our Medical Director, MBBS · How we review
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