🔄
HbA1c to Average Glucose Converter
Translate your HbA1c percentage into estimated average blood glucose.
Your HbA1c reflects your average blood glucose over the past 2–3 months. This converts that percentage into an estimated average glucose you can picture in everyday mg/dL.
Enter your values above to see your result.
Formula
eAG (mg/dL) = (28.7 × HbA1c%) − 46.7
How it is calculated
Glucose slowly attaches to hemoglobin. HbA1c measures that buildup, giving a 2–3 month average of your blood sugar.
Remember: HbA1c is an average. It can hide large swings — high spikes and low dips can produce a "normal-looking" number.
Frequently asked questions
What HbA1c is prediabetes?
By ADA criteria, 5.7–6.4% is prediabetes and 6.5%+ meets the diabetes threshold.
Scientific references
- Nathan DM et al. Diabetes Care 2008;31:1473-8
- ADA Standards of Medical Care in Diabetes
Educational tool — does not replace medical advice. Discuss your results with your doctor.