what should the oxygen level in your blood be?
<answer> 95 percent level <context> Levels of blood oxygen are measured using an oximeter, which is attached to your finger, or through a blood test using one of the arteries. According to the Mayo Clinic, the blood oxygen level test should show at least a 95 percent level. Levels between 80 percent and 94 percent are considered low but anything lower is a sign of hypoxemia.