Altitude Acclimatization Calculator

Calculate a safe ascent schedule to prevent altitude sickness. Based on the wilderness medicine guideline of no more than 1,000-1,500 ft sleeping elevation gain per day above 10,000 ft.

Results

Visualization

How It Works

The golden rule: above 10,000 ft, increase sleeping elevation by no more than 1,000 ft per day, with a rest day every 3,000 ft gained. "Climb high, sleep low" — you can hike higher during the day but sleep at a lower camp. AMS symptoms: headache, nausea, fatigue, dizziness. If symptoms worsen: DESCEND immediately. Acetazolamide (Diamox) can help prevent AMS but is not a substitute for proper acclimatization. Fitness does NOT prevent altitude sickness.