What are normal blood sugar levels? Fasting (blood sugar level after not eating for 8 hours) blood sugar should be between 70 milligrams per deciliter to 100 mg/dL. Your blood sugar should not be above 100 at any given time; If it is, this suggests a pre-diabetes condition. A level of 100 - 199 suggests prediabetes. A level over 200 suggests that you have either Type 1 or Type 2 diabetes.There are several steps in lowering your blood sugar. Try the following if you are interested in more normal .