The nurse is reviewing the hemoglobin A1c results for a patient with diabetes mellitus and notices…

➤ How do you convert A1c to estimated average glucose (eAG)?
Use the formula eAG (mg/dL) = 28.7 × A1c − 46.7. To report in mmol/L divide the final mg/dL value by 18. Multiply the A1c by 28.7, subtract 46.7, and then convert units if needed. This gives a practical average glucose comparable to self‑monitoring results.