how to calculate a1c from 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 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:

Estimated A1C = (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

Note: This is an estimation and may not replace a lab A1C test. Always consult your healthcare provider for accurate diagnosis and monitoring.