Atmospheric Pressure vs Elevation/ Altitude above Sea Level

We all know that the absolute atmospheric pressure at sea level is 101.325 kPa or 14.7 psia. The atmospheric pressure drops as the altitude above sea level increases.

The relationship between the atmospheric pressure (Pa) and elevation (meter) can be represented with the equations below.

Reference: https://www.mide.com/air-pressure-at-altitude-calculator