what a1c level is considered diabetic
1 The higher your blood sugar levels, the more hemoglobin you'll have with sugar attached. 2  A normal A1C should be below 5.7 percent. 3  An A1C level between 5.7 and 6.4 percent is considered prediabetes.4  A level of 6.5 percent or higher on two separate tests indicates you have diabetes.ollowing are other tests that your doctor may use to diagnose prediabetes: 1  A blood sugar level from 100 to 125 mg/dL (5.6 to 6.9 mmol/L) is considered prediabetes. 2  This is sometimes referred to as impaired fasting glucose (IFG). 3  A blood sugar level of 126 mg/dL (7.0 mmol/L) or higher may indicate diabetes mellitus.