The normal A1C level for nondiabetics is between 4 and 5.6 percent, according to WebMD. For diabetics, doctors recommend maintaining an A1C range of 7 percent or less for proper diabetes management and prevention of diabetic complications.
A1C levels between 5.7 and 6.4 percent indicate an increased risk of developing diabetes, while levels of 6.5 percent or more indicate the presence of diabetes, advises WebMD. The greater the A1C level, the greater the chance for the development of diabetes or diabetes complications. Doctors generally recommend diabetics submit to A1C testing every three months to ascertain the effectiveness of individual blood sugar control.