Estimated Average Glucose Calculator
Calculate estimated average glucose (eAG) from your HbA1c — what diabetes educators use to translate the lab number into something you see on your meter.
What is Estimated Average Glucose?
The estimated average glucose (eAG) is identical in mathematical form to the A1c-to-glucose conversion but framed for patient education. Many diabetes care plans now report A1c, eAG and time-in-range together so you can connect the dots between three views of the same metric.
How is it calculated?
eAG (mg/dL) = 28.7 × A1c − 46.7. The American Diabetes Association recommends an A1c target of < 7% for many adults with diabetes, corresponding to eAG < 154 mg/dL.
Frequently Asked Questions
- Why introduce eAG?
- It bridges lab numbers and home-meter readings.
- How fast does A1c change?
- About one third per month — full equilibration takes 2–3 months.
- Does fingerstick matter?
- eAG averages everything; fingersticks show specific moments.