how to calculate a1c from glucose readings

To estimate your A1C from average blood glucose readings, you can use the following formula:

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

For example, if your average blood glucose is 154 mg/dL, your estimated A1C would be:

(154 + 46.7) / 28.7 = 7.0%

Here’s a quick reference table:

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

126 6.0
154 7.0
183 8.0
212 9.0
240 10.0

This formula provides an approximation and should not replace a lab A1C test. For accurate results, consult your healthcare provider.