A1C Calculator — Estimated Average Glucose
The A1C Calculator converts your HbA1c percentage (a 3-month average blood sugar measurement) into estimated average glucose (eAG) — the same units your glucometer displays. This conversion helps you understand what your A1C result means in practical, everyday blood sugar terms. An A1C below 5.7% is normal; 5.7–6.4% indicates prediabetes; 6.5%+ indicates diabetes.
How to Use This Calculator
- 1
Enter your HbA1c percentage from your lab results.
- 2
Select your preferred glucose unit (mg/dL or mmol/L).
- 3
Click Calculate to see your estimated average blood glucose.
Frequently Asked Questions
HbA1c (glycated hemoglobin) measures the percentage of hemoglobin coated with sugar over the past 2–3 months. It reflects your average blood glucose better than a single reading.