Convert HbA1c (%) to estimated average glucose (eAG) in mg/dL and mmol/L, or convert eAG back to A1C, using the ADA/ADAG formula.
Health • A1C ↔ eAG
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HbA1c ("A1C") is a blood test that reflects your average blood sugar over the past 2–3 months. The American Diabetes Association ADAG formula converts A1C to an estimated average glucose: eAG (mg/dL) = 28.7 × A1C − 46.7. So an A1C of 7% is about 154 mg/dL (8.6 mmol/L).
This converter shows eAG in both US (mg/dL) and international (mmol/L) units and flags the general category (normal, prediabetes or diabetes range). It is for information and education only — not a diagnosis. Always discuss your results with your clinician.