how to calculate a1c

The A1C test measures your average blood sugar levels over the past 2-3 months. It is reported as a percentage, and the formula to estimate A1C from average blood glucose levels is as follows:

• Formula:

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

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

A1C = (154 + 46.7) / 28.7 = 7.0%

You can also use the following table for quick reference:

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

6 126
7 154
8 183
9 212
10 240

For accurate results, consult your healthcare provider and get an A1C test done in a lab.