Est. Avg Glucose

As glucose moves through your blood, a little of it permanently sticks to hemoglobin, the oxygen-carrying protein inside your red blood cells. The more glucose you carry on average, the more gets coated. Red cells live 2 to 3 months, so this coating holds a rolling memory of your blood sugar over that whole window.

eAG and HbA1c are the same blood result on different scales. HbA1c reports the coating as a percentage. eAG runs that percentage through a standard formula (eAG mg/dL = 28.7 × A1c − 46.7) to give you a glucose number instead. Same measurement, more familiar units.

Your eAG tells you how your blood sugar has been running over the past quarter, in a number you already recognize from a meter. Because it tracks a single 2-to-3-month window, the changes you make to diet, movement, sleep, and medication show up clearly here, so it gives fast feedback on what is working. Most people with diabetes aim for under 8.6 mmol/L, and a value between about 3.9 and 6.3 sits in the normal range.

A higher eAG means blood sugar has been running elevated. Over time, keeping it in range is what protects the eyes, kidneys, nerves, and heart, and eAG is one of the most responsive markers you have, so elevated numbers often move with everyday changes. Read it as a clue alongside your actual meter or CGM readings and the rest of your metabolic picture, with your clinician, rather than as a diagnosis on its own.