A1C Calculator

Convert HbA1c to estimated average blood glucose and vice versa.

Estimated Average Glucose
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mg/dL
0
mmol/L
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Risk Level
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A1C Reference Ranges

NormalBelow 5.7%
Prediabetes5.7% - 6.4%
Diabetes6.5% or above
Target (diabetic)Below 7.0%

Understanding HbA1c

HbA1c (glycated hemoglobin) reflects your average blood sugar over the past 2-3 months. The formula used is: eAG (mg/dL) = 28.7 x A1C - 46.7. To convert mg/dL to mmol/L, divide by 18.0182.

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