1. What is eAG?

Estimated Average Glucose (eAG) is calculated from your A1C test result to help you understand your average blood glucose levels in the same units (mg/dL) as your daily glucose measurements.

2. How Does the Calculator Work?

The calculator uses the ADAG (A1C-Derived Average Glucose) equation:

Where:

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

Explanation: This linear relationship was derived from the ADAG study that measured continuous glucose monitoring in patients to correlate A1C with average glucose levels.

3. Importance of eAG Calculation

Details: eAG helps patients and providers understand A1C results in terms of everyday glucose meter readings, making the relationship between test results and daily glucose control more intuitive.

4. Using the Calculator

Tips: Enter your A1C percentage (typically between 4% and 14%). The result shows your estimated average glucose level in mg/dL, which you can compare to your daily glucose readings.

5. Frequently Asked Questions (FAQ)

Q1: Why convert A1C to eAG?
A: Many patients find it easier to understand their glucose control when expressed as daily average glucose (mg/dL) rather than as A1C percentage.

Q2: How accurate is eAG?
A: The formula is based on population averages. Individual variations in red blood cell lifespan and other factors may cause differences between eAG and actual average glucose.

Q3: What's the difference between eAG and my glucose meter average?
A: eAG represents a 3-month average, while meter averages typically cover a shorter period and may not include post-meal spikes or overnight values.

Q4: Can I use this for diagnosis of diabetes?
A: No, this is only for interpreting A1C results. Diabetes diagnosis should be made using standard criteria including A1C, fasting glucose, or oral glucose tolerance tests.

Q5: Does this work for all A1C values?
A: The formula was validated for A1C values between 5-12%. Outside this range, the relationship may be less accurate.