Estimated Average Glucose Calculator
Convert an HbA1c percentage into an estimated average glucose (eAG) reading, the way many lab reports display it alongside your A1C result.
What is eAG
Estimated Average Glucose (eAG) translates an HbA1c lab result — which reflects average blood sugar over roughly the prior two to three months — into a number expressed in the same units as a daily glucose meter reading, making it easier to relate to day-to-day monitoring.
The formula used
This calculator uses the standard formula derived from the ADAG (A1c-Derived Average Glucose) study: eAG (mg/dL) = 28.7 × A1C − 46.7. The mg/dL value is also converted to mmol/L for regions that use that unit.
This tool is for general educational and planning purposes only. Always interpret HbA1c and glucose results together with a qualified healthcare professional, since individual factors can affect the relationship between the two.