Altitude Acclimatization Calculator
Estimate how long it takes to acclimatize to high altitude based on your starting and destination elevation.
Acclimatization Estimate
Altitude acclimatization is the process your body uses to adapt to lower oxygen levels at high elevations.
Altitude zones:
| Zone | Elevation | Oxygen Level |
|---|---|---|
| Low | 0–1,500 m (0–5,000 ft) | 100–95% |
| Moderate | 1,500–2,500 m (5,000–8,200 ft) | 95–88% |
| High | 2,500–3,500 m (8,200–11,500 ft) | 88–82% |
| Very high | 3,500–5,500 m (11,500–18,000 ft) | 82–69% |
| Extreme | 5,500+ m (18,000+ ft) | Below 69% |
General rules:
- Above 2,500 m, ascend no more than 300–500 m per day
- Take a rest day every 1,000 m gained
- Full acclimatization takes about 1 day per 300 m above 2,500 m
- Symptoms of altitude sickness: headache, nausea, fatigue, dizziness
Note: This is general guidance. Always consult a doctor before high-altitude travel.