how to calculate a1c from blood glucose

The A1C test measures your average blood glucose levels over the past 2-3 months. While you cannot directly calculate A1C from a single blood glucose reading, you can estimate it using the following formula:

Estimated A1C (%) = (Average Blood Glucose + 46.7) / 28.7

For example, if your average blood glucose is 154 mg/dL:

• A1C = (154 + 46.7) / 28.7 = 7%

Here’s a quick reference table:

Average Blood Glucose (mg/dL) Estimated A1C (%)

126 6
154 7
183 8
212 9
240 10

Note: This is an estimation and may not be as accurate as a lab-performed A1C test. Always consult your healthcare provider for precise measurements and interpretation.