1. What is A1C?

Hemoglobin A1C (glycated hemoglobin) reflects average blood glucose levels over the past 2-3 months. It's a crucial marker for diabetes diagnosis and management.

2. How Does the Calculator Work?

The calculator uses the ADA-recommended formula:

Where:

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

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

3. Importance of A1C Measurement

Details: A1C is used to diagnose diabetes (≥6.5%) and assess glycemic control in diabetics. It correlates with diabetes complications risk.

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: What's the difference between A1C and daily glucose tests?
A: A1C shows long-term (2-3 month) average, while daily tests show immediate glucose levels.

Q2: What are normal A1C values?
A: Normal is <5.7%, 5.7-6.4% indicates prediabetes, ≥6.5% indicates diabetes.

Q3: Does A1C replace regular glucose monitoring?
A: No, diabetics still need regular glucose checks for daily management.

Q4: Can A1C be inaccurate?
A: Yes, conditions like anemia or hemoglobin variants can affect A1C accuracy.

Q5: How often should A1C be checked?
A: Diabetics typically every 3-6 months; prediabetes annually; normal every few years.