What Is a Good Oxygen Level?

By Staff WriterLast Updated Apr 14, 2020 12:05:59 PM ET
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A normal oxygen level is 95 to 100 percent oxygen, as measured by pulse oximetry, says the Mayo Clinic. A pulse oximeter is a small device which clips on a finger and measures oxygen saturation in the blood, a measurement which is usually considered to be the equivalent of blood oxygen levels.