What is the normal blood sugar be for a child under 10 yrs old.?

Depends: The expected bs for a child falls into a range( rather than a single number) that varies some with the situation. Within the first few hours of birth 40-60 would be expected, while 30-60 might be seen with a premi. After the 1st day 50-80 mg/dl, & by 1yr 60-100, teens 75-110. Those numbers apply to blood glucose on a venous sample. Test strips are less reliable.

70-100: Normal blood sugar is between 70-100. In children it may be a be slightly less tha 70.

60-99 mg/dL: Fasting blood glucose levels range from about 60-99 mg%.

70 -125: Ranges depending on fasting state, exercise, etc.

Same as adult: Unless the child is a newborn, a normal fasting blood sugar should be between 65-99 mg/dl. Two hours following a meal, the blood sugar should be less than 140 mg/dl.