A1C to Blood Sugar Calculator

Convert your Hemoglobin A1C percentage to Estimated Average Glucose (eAG) in mg/dL and mmol/L.

Estimated Average Glucose (mg/dL)154.2
Estimated Average Glucose (mmol/L)8.6

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Understanding A1C and eAG

The Hemoglobin A1C test provides an average of your blood sugar levels over the past 2 to 3 months. Translating this percentage into an Estimated Average Glucose (eAG) helps patients understand their A1C in the same numbers (mg/dL or mmol/L) they see daily on their glucose meters.

The Conversion Formula

The American Diabetes Association uses a specific formula derived from continuous glucose monitoring data: eAG (mg/dL) = (28.7 * A1C) - 46.7.

Worked Example

  1. A1C Result: 7.0%
  2. eAG (mg/dL) = (28.7 * 7) - 46.7 = 154.2 mg/dL.
  3. To convert to mmol/L, divide by 18.018 = 8.5 mmol/L.

Frequently Asked Questions

Is a 7.0 A1C good?

For many non-pregnant adults with diabetes, the American Diabetes Association recommends an A1C target of less than 7.0%. However, individual goals vary heavily based on age and health status. Always consult your endocrinologist.