The normal oxygen level in the human body is approximately 98.6%. [1] However, this number can vary depending on a person's age, activity level , and overall health. Learn about blood oxygen levels , their importance, normal oxygen saturation by age, pulse oximeter readings chart, and healthy saturation normal range. The blood oxygen levels of your body is a measure of how much oxygen the red blood cells are carrying 95 to 100 percent is considered normal .
