Altitude Acclimatization Calculator
Plan a safe acclimatization schedule for high-altitude mountaineering. Calculate recommended ascent rate, rest days, and altitude sickness risk based on Wilderness Medical Society guidelines.
Inputs
Results
Recommended Days
11 days
Max Daily Altitude Gain
400 m/day
How to Use This Calculator
- Enter your starting altitude in meters (e.g., 2500 m for a trailhead base camp).
- Input your target altitude in meters — the highest point you plan to sleep at.
- Set your current acclimatized altitude, or leave at 0 if you are coming from sea level.
- Review the recommended Acclimatization Days and maximum Daily Altitude Gain (m) based on WMS guidelines.
- Note the Rest Days Required and schedule them into your itinerary every ~1000 m of gain above 3000 m.
- Check the AMS Risk Level — if rated High or above, plan a longer acclimatization profile before attempting your target.
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