Hemoglobin A1C Chart. Hemoglobin a1c is the average of what your blood sugar level has been throughout the day over the past two to three months. Hemoglobin a1c or hba1c test or glycosylated hemoglobin is a form of hemoglobin that contains sugar.
However, it is used as a standard tool to determine blood sugar control in patients known to have diabetes. Hemoglobin a1c levels between 5.7% and 6.4% mean you have prediabetes and a higher chance of getting diabetes. In healthy people, the hba1c level is less than 6% of total hemoglobin.