1. What is A1C and eAG?

A1C (glycated hemoglobin) reflects average blood glucose levels over the past 2-3 months. eAG (estimated Average Glucose) is the calculated average glucose level that corresponds to a specific A1C value.

2. Conversion Formulas

The calculator uses these conversion formulas:

Where:

• \( A1C \) — Glycated hemoglobin (percentage)
• \( eAG \) — Estimated average glucose (mg/dL)

3. Clinical Importance

Details: The A1C test is a cornerstone of diabetes management, while eAG helps patients understand their average glucose levels in more familiar units.

4. Using the Calculator

Tips: Enter either A1C or eAG value to calculate the corresponding value. The calculator automatically performs the conversion in both directions.

5. Frequently Asked Questions (FAQ)

Q1: Why convert between A1C and eAG?
A: eAG helps patients understand their A1C results in terms of daily glucose measurements they're familiar with.

Q2: What's a normal A1C level?
A: Below 5.7% is normal, 5.7%-6.4% indicates prediabetes, and 6.5% or higher suggests diabetes.

Q3: How often should A1C be tested?
A: Every 3 months for diabetes management, or every 6-12 months for prediabetes monitoring.

Q4: Are there limitations to A1C testing?
A: A1C may be inaccurate in conditions affecting red blood cell turnover like anemia or recent blood loss.

Q5: Do all patients have the same A1C-eAG relationship?
A: While the formula works for most people, individual variations in glycation rates can cause slight differences.