Elevation & Altitude Calculator

Drag the slider to see how changes in elevation impact atmospheric pressure, temperature, and oxygen.

9,000m Death Zone
8,848m Mt. Everest
5,895m Mt. Kilimanjaro
1,609m Denver / Mile High
0m Sea Level
-430m Dead Sea
Current Elevation 0 Meters

Atmospheric Physics

Barometric Pressure Hectopascals (hPa)
1013 hPa
Air Temperature Standard Lapse Rate
15.0 °C
Effective Oxygen Relative to Sea Level
20.9 %
Water Boiling Point Clausius-Clapeyron Rel.
100.0 °C

Why does this happen?

Gravity pulls air molecules toward Earth. At lower elevations, the weight of all the air above compresses the air below, increasing pressure, temperature, and oxygen density. As you climb, the air thins out.