1. What is the eAG Formula?

The eAG (estimated Average Glucose) formula converts HbA1c percentage values to average glucose levels in mg/dL. This provides a more intuitive understanding of average blood glucose control over the previous 2-3 months.

2. How Does the Calculator Work?

The calculator uses the eAG formula:

Where:

• \( HbA1c \) — Glycated hemoglobin percentage
• 28.7 — Conversion coefficient
• 46.7 — Adjustment constant

Explanation: The formula provides a linear conversion from HbA1c percentage to estimated average glucose levels in mg/dL, allowing patients to better understand their glucose control in familiar units.

3. Importance of eAG Calculation

Details: Converting HbA1c to eAG helps patients relate their long-term glucose control to daily glucose meter readings, improving diabetes management and treatment adherence.

4. Using the Calculator

Tips: Enter HbA1c value as a percentage (e.g., 6.5). The calculator will provide the corresponding estimated average glucose in mg/dL.

5. Frequently Asked Questions (FAQ)

Q1: Why convert HbA1c to eAG?
A: Many patients find mg/dL units more familiar and meaningful than HbA1c percentages, making it easier to understand their glucose control.

Q2: How accurate is the eAG conversion?
A: The formula provides a good estimate based on population studies, but individual variations may occur due to differences in red blood cell lifespan and other factors.

Q3: What are normal eAG values?
A: Normal eAG corresponds to HbA1c below 5.7% (eAG < 117 mg/dL). Values between 117-137 mg/dL indicate prediabetes, and higher values suggest diabetes.

Q4: Can eAG replace daily glucose monitoring?
A: No, eAG provides an average but doesn't show glucose variability. Both HbA1c/eAG and daily glucose monitoring are important for comprehensive diabetes management.

Q5: Are there limitations to this conversion?
A: The formula may be less accurate in conditions that affect red blood cell turnover, such as anemia, hemoglobinopathies, or recent blood transfusions.