how to calculate a1c from blood sugar

The A1C test measures your average blood sugar levels over the past 2-3 months. While you cannot directly calculate A1C from a single blood sugar 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 level is 154 mg/dL, your estimated A1C would be:

(154 + 46.7) / 28.7 = 7.0%

Here’s a quick reference table for A1C and average blood glucose levels:

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

6 126
7 154
8 183
9 212
10 240

Keep in mind that this is an estimation. For an accurate A1C measurement, a blood test performed by a healthcare professional is required.