Normal: HbA1c below 5.7%; Prediabetes: HbA1c between 5.7% and 6.4%; Diabetes: HbA1c of 6.5% or higher; Your results may mean something different. If you have questions about your results, talk to your health care provider. If you have diabetes, the American Diabetes Association recommends keeping your HbA1c levels below 7%..