The targeted blood glucose level for adult, non-pregnant diabetics is 154 mg/dL, says the American Diabetes Association. However, ideal blood glucose levels are specific to each individual and based on various factors including the duration of diabetes, age and life expectancy and a number of other conditions.
Blood glucose levels tested when the patient has not consumed a meal in the eight hours prior is known as 'fasting blood glucose' and should range from 70 to 130 mg/dL, says the American Diabetes Association. 'Postprandial plasma glucose' indicates the level one to two hours after the start of a meal; this should always be less than 180 mg/dL.
At bedtime the target range is 100 to 140 mg/dL. If taking insulin, a diabetic should have a blood sugar of at least 100 mg/dL before exercising. Although these levels are ideal for diabetics, what is normal for one person is different than what is normal for someone else.