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eAG Calculation Formula:
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Estimated Average Glucose (eAG) is a calculated value that represents your average blood sugar level over the past 2-3 months. It's derived from your HbA1c test results and provides blood sugar levels in the same units (mg/dL) as your daily glucose measurements.
The calculator uses the eAG conversion formula:
Where:
Explanation: This formula converts HbA1c values from the international standard (mmol/mol) to estimated average glucose levels that correspond to daily glucose meter readings.
Details: eAG helps patients and healthcare providers understand HbA1c results in the context of daily glucose monitoring. It bridges the gap between long-term glycemic control (HbA1c) and day-to-day blood sugar fluctuations.
Tips: Enter your HbA1c value in mmol/mol units. The result will show your estimated average glucose in mg/dL, which can be compared to your daily glucose meter readings.
Q1: Why convert HbA1c to eAG?
A: eAG helps patients relate their HbA1c results to their daily glucose meter readings, making it easier to understand how well diabetes is managed.
Q2: What are normal eAG values?
A: For non-diabetics, eAG is typically below 140 mg/dL. For diabetics, target eAG values depend on individual treatment goals set with healthcare providers.
Q3: How often should HbA1c be measured?
A: Most people with diabetes should have their HbA1c tested every 3-6 months, depending on their treatment plan and how well their blood sugar is controlled.
Q4: Are there limitations to eAG calculation?
A: eAG is an estimate and may not perfectly match average glucose from continuous glucose monitoring, especially in people with unusual red blood cell turnover or hemoglobin variants.
Q5: Can I use this calculator if my HbA1c is in percentage units?
A: No, this calculator is specifically designed for HbA1c values in mmol/mol units. For percentage units, a different conversion formula is needed.