Altitude calculator
What does your mountain do to your oxygen?
Set your target altitude or pick a mountain. You immediately see the effective oxygen level, air pressure and altitude zone, plus what that means for your preparation.
23,406 ft
0 m9.000 m
Effective oxygen level
8.6%
Relative to sea level41%
Air pressure403hPa
Standard temperature-31°C
Comparable toAconcagua (~7,010 m)
Advice for this altitude
- Practical focus: start 6 to 8 weeks ahead, mental preparation, team coordination
- Pre-acclimatisation: part of the overall expedition plan
- Goal: Peak Lenin, Denali and 7,000 m+ expeditions
- Medical screening and supervision are mandatory
Typical symptoms: Impaired coordination, mental sluggishness, very poor sleep, rapid loss of strength
Red flags: always descend and seek medical help: Unable to walk unaided, severe breathlessness at rest, confusion or decreasing consciousness
Altitude calculator
Oxygen per altitude
| Altitude | Oxygen | vs sea level |
|---|---|---|
| 0 m | 20.9% | 100% |
| 610 m | 19.4% | 93% |
| 1,219 m | 17.9% | 86% |
| 1,829 m | 16.6% | 79% |
| 2,438 m | 15.4% | 74% |
| 3,048 m | 14.3% | 68% |
| 3,658 m | 13.2% | 63% |
| 4,267 m | 12.3% | 59% |
| 4,877 m | 11.4% | 55% |
| 5,486 m | 10.5% | 50% |
| 6,096 m | 9.7% | 46% |
| 6,706 m | 9.0% | 43% |
| 7,315 m | 8.4% | 40% |
| 7,925 m | 7.8% | 37% |
| 8,534 m | 7.2% | 34% |
| 9,144 m | 6.3% | 30% |