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HbA1c Calculation Formula:
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Hemoglobin A1c (HbA1c) is a form of hemoglobin that is chemically linked to glucose. It provides an average of your blood sugar levels over the past 2-3 months and is a crucial marker for diabetes management and diagnosis.
The calculator uses the conversion formula:
Where:
Explanation: This formula converts average blood glucose levels (eAG) to the corresponding HbA1c percentage, providing a standardized way to relate daily glucose measurements to long-term glycemic control.
Details: HbA1c is a critical diagnostic tool for diabetes and prediabetes. It helps healthcare providers assess long-term glucose control, evaluate treatment effectiveness, and predict the risk of diabetes complications.
Tips: Enter your average blood glucose level in mg/dL. The value should be based on multiple readings over time for accurate HbA1c estimation. All values must be valid (eAG > 0).
Q1: What is the normal range for HbA1c?
A: Normal HbA1c is below 5.7%. 5.7% to 6.4% indicates prediabetes, and 6.5% or higher indicates diabetes.
Q2: How often should HbA1c be tested?
A: People with diabetes should typically have HbA1c tested every 3-6 months, while those with stable glucose control may test less frequently.
Q3: Can HbA1c be inaccurate in certain conditions?
A: Yes, conditions like anemia, hemoglobin variants, kidney disease, or recent blood loss can affect HbA1c accuracy.
Q4: What's the difference between HbA1c and daily glucose readings?
A: Daily glucose readings show momentary levels, while HbA1c provides a 2-3 month average, giving a broader picture of glucose control.
Q5: Can I use this calculator for diabetes diagnosis?
A: This calculator provides an estimate. Official diabetes diagnosis should always be made by a healthcare professional using laboratory tests.