9000 feet

How Much Oxygen Is In The Air At 10000 Feet? Altitude (ft) Altitude (m) Effective O2 % 10,000 ft 3048 m14.3 % 11,000 ft 3353 m 13.7 % 12,000 ft 3658 m 13.2 % 13,000 ft 3962 m 12.7 % At what height there is no oxygen? It refers to altitudes above a certain point