What are the category values for A1C?

A1C measurement reflects your average blood sugar level for the past two to three months.

Specifically, the A1C test measures what percentage of your hemoglobin – a protein in red blood cells that carries oxygen – is coated with sugar (glycated). The higher your A1C level, the poorer your blood sugar control and the higher your risk of diabetes complications. 

Classification	Value
Normal	less than 5.7%
Prediabetes	5.7% to 6.5%
Diabetes	6.5% or higher

Source: American Diabetes Association.