Hemoglobin A1c Calculator
Convert your A1c percentage to Estimated Average Glucose (eAG).
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Status
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Risk Level
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Enter your A1c value to see your average blood sugar levels.
Estimated Average Glucose
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mg/dL
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mmol/L
Normal
Prediabetes
Diabetes
| Category | A1c Range | Avg. Glucose (mg/dL) |
|---|---|---|
| Normal | Below 5.7% | Below 117 mg/dL |
| Prediabetes | 5.7% – 6.4% | 117 – 137 mg/dL |
| Diabetes | 6.5% or higher | 140+ mg/dL |
Medical Disclaimer
This tool uses the ADAG (A1c-Derived Average Glucose) formula: 28.7 × A1c – 46.7 = eAG. A1c values represent a 3-month average and should not be used to diagnose diabetes on their own. Always consult your doctor for diagnosis and clinical decisions.