Estimated Average Glucose eAG Calculator

HbA1c percent Estimated Average Glucose eAG Explanation and Clinical Context Estimated Average Glucose represents a practical translation of HbA1c into a glucose value expressed in mg per dL which helps clinicians and patients understand long term glycemic exposure in a more intuitive format. The relationship between HbA1c and eAG was established through large population studies that correlated continuous glucose monitoring values with laboratory measured HbA1c. The commonly used formula is eAG equals 28.7 multiplied by HbA1c minus 46.7.

Lower eAG values reflect better long term glycemic control while elevated values suggest sustained hyperglycemia. Typical HbA1c targets recommended for many adults with diabetes correspond to an eAG around one hundred fifty mg per dL although individualized goals should consider age comorbidities risk of hypoglycemia and overall clinical context. This tool supports diabetes management by providing a clear estimate that aligns the HbA1c percentage with an equivalent mean glucose level that can be discussed during patient counseling and treatment adjustment.

Reference Nathan DM et al. Translating the HbA1c assay into estimated average glucose values. Diabetes Care.

2008.