Altitude to Oxygen Chart - Oxygen Levels at Different Altitudes A conservative estimate for A-a gradient is (Age/4)+4. Peripheral oxygen saturation is also used to calculate arterial oxygen content (CaO2). Below is an altitude oxygen chart that extrapolates oxygen percentages to real altitude, which you can use in conjunction with Hypoxico systems. The calculations above are based on the equation developed by Severinghaus*: SO 2 = (23,400 * (pO 23 + 150 * pO 2) -1 + 1) -1 This is only an estimate and does not account for differences in temperature, pH, and concentrations of 2,3 DPG. Tests to measure your oxygen levels | Asthma + Lung UK Something as simple as opening your windows or going for a short walk increases the amount of oxygen that your body brings in, which increases . This level is measured by an oximeter that clips to the tip of a finger. This is your body attempting to balance out the lack of oxygen in the air by moving it faster through your body. PF Ratio Calculator Fitbit Estimated Oxygen Variation: We explain SpO2, sleep ... - Wareable The most common way to measure PaO2 is to take an arterial-blood gas test. According to Henry's law, the amount of dissolved oxygen is proportional to the partial pressure of oxygen and its solubility coefficient. A normal A-a gradient for a young adult non-smoker is between 5-10mmHg. That's considered normal. "Normal SpO2 values are in the high or even mid- to low 90s," says Atul . The medical definition of a low blood oxygen rate is any percentage below 90% oxygen saturation. Oxygen Saturation Oxygen Saturation, Calculated Calculate the oxygen saturation from the pO2. Oxygen Levels at Altitude | Center for Wilderness Safety Version 3.6-- 2018/08/27 [version history] Note that version 3.0 [2011/08/03] was a major upgrade in which the equations used to compute oxygen solubility were replaced . Open windows or get outside to breathe fresh air.