Forbes Health's medically reviewed guide explores normal blood sugar (glucose) levels by age, plus when it might be appropriate to visit a doctor.

Blood sugar chart displays fasting and postprandial values for normal, early-stage, and established diabetes. This Blood Sugar Chart calculator helps assess the likelihood of diabetes.

Recommended blood sugar levels can help you know if your blood sugar is in a "normal" range. See the charts in this article for type 1 and type 2 diabetes for adults and children.

Normal Blood Sugar Levels for Older Adults The following chart outlines normal blood sugar levels, as well as ranges that are consistent with prediabetes and diabetes. These ranges apply to all ...

While blood sugar is essential to survive, when blood sugar levels get too high, one may have a condition called hyperglycemia.

A blood sugar chart can help a person know if their glucose levels are within a suitable range. If a person has diabetes, a doctor will make a plan to suit them.

High or low blood sugar can lead to complications, but these conditions are treatable. Learn what constitutes normal blood sugar and how it's tested.

This simple chart from WebMD shows target blood sugar levels for kids and teens before and after meals, after fasting, before exercise, and at bedtime, as well as an A1c target.

Diabetes can happen when healthy sugar levels are not maintained. Learn what levels should be and the symptoms of high and low blood sugar.