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eAG Formula:
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The eAG (estimated Average Glucose) formula converts HbA1c percentage to an average glucose value in mg/dL. This helps patients and healthcare providers relate HbA1c results to daily glucose monitoring values.
The calculator uses the eAG formula:
Where:
Explanation: The formula provides an estimated average glucose level that corresponds to the HbA1c measurement, helping to translate long-term glucose control into more familiar daily glucose values.
Details: Converting HbA1c to eAG helps patients better understand their diabetes control by relating it to their daily glucose meter readings, improving diabetes management and patient engagement.
Tips: Enter HbA1c value as a percentage (e.g., 6.5). The value must be greater than 0. The calculator will provide the estimated average glucose in mg/dL.
Q1: What is the relationship between HbA1c and average glucose?
A: HbA1c reflects average blood glucose levels over the past 2-3 months. The eAG formula converts this percentage to an estimated average glucose value in mg/dL.
Q2: How accurate is the eAG calculation?
A: The formula provides a good estimate for most people, but individual variations in red blood cell lifespan and other factors can affect the accuracy.
Q3: Can eAG replace daily glucose monitoring?
A: No, eAG is an estimated average and doesn't show glucose variability or hypoglycemic episodes. Daily monitoring is still essential for diabetes management.
Q4: What are normal HbA1c and eAG values?
A: Normal HbA1c is below 5.7% (eAG < 117 mg/dL). Prediabetes: 5.7-6.4% (eAG 117-137 mg/dL). Diabetes: ≥6.5% (eAG ≥140 mg/dL).
Q5: Does this formula work for all patient populations?
A: The formula was derived from studies of mostly adult populations. It may be less accurate in children, pregnant women, or those with certain hematological conditions.