A1c Test - Normal Range

The A1C test is a common blood test used to diagnose type 1 and type 2 diabetes and then to gauge how well you’re managing your diabetes. The A1C test result reflects your average blood sugar level for the past two to three months.

Other names: glycated hemoglobin, glycosylated hemoglobin, hemoglobin A1C and HbA1c

Test Preparation: none


  • A nondiabetic person will have an A1c result less than 5.7% (39 mmol/mol).
  • Diabetes: A1c level is 6.5% (48 mmol/mol) or higher.
  • Increased risk of developing diabetes in the future: A1c of 5.7% to 6.4% (39-46 mmol/mol)


For monitoring glucose, A1c is currently reported as a percentage and, for most diabetics, it is recommended that they aim to keep their hemoglobin A1c below 7%. The closer diabetics can keep their A1c to the American Diabetes Association (ADA)’s therapeutic goal of less than 7% without experiencing excessive low blood glucose (hypoglycemia), the better their diabetes is in control. As the A1c increases, so does the risk of complications.

An individual with type 2 diabetes, however, may have an A1c goal selected by the person and his or her healthcare provider. The goal may depend on several factors, such as length of time since diagnosis, the presence of other diseases as well as diabetes complications (e.g., vision impairment or loss, kidney damage), risk of complications from hypoglycemia, limited life expectancy, and whether or not the person has a support system and healthcare resources readily available.



* 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.