A1c Test – Reference Range

For people without diabetes, the normal range for the hemoglobin A1c test is between 4% and 5.6%.

Hemoglobin A1c levels between 5.7% and 6.4% indicate increased risk of diabetes, and levels of 6.5% or higher indicate diabetes. Someone without diabetes will have about 5 percent of their hemoglobin glycated.

A normal A1c level is 5.6 percent or below, according to the National Institute of Diabetes and Digestive and Kidney Diseases. A level of 5.7 to 6.4 percent indicates prediabetes. People with diabetes have an A1c level of 6.5 percent or above.

The American Diabetes Association provides a calculator that shows how A1c levels correlate to glucose levels. To monitor overall glucose control, people with diabetes should have an A1c test at least twice a year.

Keywords: A1c; glycated hemoglobin; gycohemoglobin; glycosylated hemoglobin; HbA1c; hemoglobin A1c

* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.