🍬 Estimated Average Glucose (eAG) from HbA1c
Convert HbA1c to estimated average glucose (eAG) with the ADAG formula.
Clinical takeaway
Anemia, hemoglobin variants, recent transfusion and pregnancy alter the relationship.
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When to use
Translate HbA1c into an average glucose patients can relate to.
How it works
eAG (mg/dL) = 28.7 × HbA1c − 46.7; divide by 18 for mmol/L. Reflects mean glucose over ~ 2–3 months.
Key points
- Anemia, hemoglobin variants, recent transfusion and pregnancy alter the relationship.
- eAG complements but does not replace day-to-day glucose monitoring.
- Useful for patient education.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| HbA1c | 7.0 % |
|---|
→Estimated average glucose8.6mmol/L
- Equivalent：154 mg/dL
- Formula：eAG (mg/dL) = 28.7 × HbA1c − 46.7
Frequently asked questions
- What is Estimated Average Glucose (eAG) from HbA1c?
- Convert HbA1c to estimated average glucose (eAG) with the ADAG formula.
- How is Estimated Average Glucose (eAG) from HbA1c calculated? What is the core formula?
- eAG (mg/dL) = 28.7 × HbA1c − 46.7; divide by 18 for mmol/L. Reflects mean glucose over ~ 2–3 months.
- When is Estimated Average Glucose (eAG) from HbA1c used?
- Translate HbA1c into an average glucose patients can relate to.
- What are the key clinical points for Estimated Average Glucose (eAG) from HbA1c?
- Anemia, hemoglobin variants, recent transfusion and pregnancy alter the relationship. eAG complements but does not replace day-to-day glucose monitoring. Useful for patient education.
- What are the limits and cautions when using Estimated Average Glucose (eAG) from HbA1c?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is Estimated Average Glucose (eAG) from HbA1c calculated in practice? Can you show a worked example?
- Inputs: HbA1c 7.0 % → Result: Estimated average glucose 8.6 mmol/L（Equivalent: 154 mg/dL, Formula: eAG (mg/dL) = 28.7 × HbA1c − 46.7）