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Oxygen Saturation Altitude Estimator

Medicine & Clinical Tools

Estimate the expected drop in blood oxygen saturation at higher altitude.

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0 ft29,000 ft

Estimated Oxygen Saturation at Altitude

90.0

A rough illustrative estimate of oxygen saturation at this altitude, using a general approximation of about 1 percentage point drop per 1,000 feet of elevation gain.

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Odeh Ahwal

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Odeh Ahwal
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Frequently Asked Questions

Why does oxygen saturation drop at higher altitude?

Atmospheric pressure decreases with altitude, reducing the partial pressure of oxygen available to diffuse into the bloodstream through the lungs, which results in lower blood oxygen saturation even with normal lung function.

Is this estimate accurate for all individuals?

No, this is a rough population-level approximation — actual altitude tolerance varies significantly based on individual acclimatization, underlying lung or heart conditions, and physical exertion level at altitude.

At what oxygen saturation level does altitude sickness become a concern?

Significant drops in oxygen saturation at altitude can contribute to altitude sickness symptoms, though the relationship is complex and individual — anyone with concerning symptoms at altitude should seek appropriate medical evaluation.

Sources

  1. High-Altitude Oxygenation, StatPearls / NCBI Bookshelf (NIH)
  2. Travel to High Altitudes, Centers for Disease Control and Prevention (CDC)
  3. Pulse Oximetry, StatPearls / NCBI Bookshelf (NIH)

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