1. What is the A1C Calculator?

The A1C Calculator estimates hemoglobin A1C (glycated hemoglobin) from average glucose levels using the Accu-Chek formula. A1C reflects average blood glucose levels over the past 2-3 months.

2. How Does the Calculator Work?

The calculator uses the Accu-Chek formula:

Where:

• \( eAG \) — Estimated Average Glucose (mg/dL)
• 46.7 and 28.7 — Constants in the Accu-Chek formula

Explanation: The formula provides a linear relationship between average glucose levels and hemoglobin A1C percentage.

3. Importance of A1C Measurement

Details: A1C is a crucial marker for long-term glucose control in diabetes management, with target levels typically below 7% for most diabetics.

4. Using the Calculator

Tips: Enter your average glucose level in mg/dL. The value must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this formula?
A: The formula provides a good estimate but may vary slightly from lab-measured A1C due to individual variations in hemoglobin glycation.

Q2: What are normal A1C values?
A: Normal is below 5.7%, 5.7%-6.4% indicates prediabetes, and 6.5% or higher suggests diabetes.

Q3: How often should A1C be checked?
A: Typically every 3-6 months for diabetics, depending on treatment plan and glucose control.

Q4: Can A1C be misleading?
A: Yes, in conditions affecting red blood cell turnover (anemia, hemoglobinopathies) or recent blood loss/transfusion.

Q5: What's the difference between A1C and eAG?
A: A1C is a percentage reflecting long-term control, while eAG is in mg/dL and represents an estimated average glucose level.