Air Pressure vs Altitude
Standard Atmosphere Reference Table and Graph (SI Units)
Air Pressure Table vs Altitude
| Altitude (km) | Pressure (Pa) |
|---|---|
| 0 | 101325 |
| 5 | 54019 |
| 10 | 26436 |
| 20 | 5474 |
| 30 | 1197 |
| 40 | 287 |
| 50 | 79.8 |
| 60 | 21.0 |
| 70 | 5.5 |
| 80 | 1.4 |
| 90 | 0.36 |
| 100 | 0.08 |
Air Pressure vs Altitude Graph
About Air Pressure vs Altitude
Air pressure decreases with altitude in the Earth's atmosphere according to the International Standard Atmosphere (ISA) model. Pressure drops rapidly in the troposphere and continues to decrease in the stratosphere, mesosphere, and thermosphere. Understanding the pressure profile is essential for aerospace engineering, thermodynamics, meteorology, and fluid mechanics.
Accurate knowledge of air pressure at different altitudes is critical for applications such as aircraft performance calculations, rocket trajectory planning, weather modeling, and HVAC design at high altitudes. Pressure also affects air density, temperature, and other atmospheric properties vital for engineering and scientific analysis.
The table and graph on this page provide a clear reference of air pressure as a function of altitude in SI units, covering the range from sea level to 100 km. This reference supports engineers, scientists, and educators in performing thermodynamic calculations, aerodynamic simulations, and atmospheric studies.
Engineers and researchers can combine this pressure-altitude data with other atmospheric properties such as temperature, density, and specific gas constant to model air behavior in flow systems, propulsion systems, and climate simulations.