NWP | Pressure Altitude Calculator

Pressure Altitude Calculator

Pressure Altitude

• Pressure Altitude Calculator | NOAA
• What is the formula for the pressure altitude script?

From the user, a station pressure ($P_{sta}$) is given. To calculate the pressure altitude, the station pressure must be in units of millibars (mb). To see how to convert station pressure to millibars see the link below: Pressure Conversion Then, the pressure altitude ($h_{alt}$) can be calculated using the equation below:

$$h_{alt}=(1-{\left(\frac{P_{sta}}{1013.25}\right)}^{0.190284})\times 145366.45$$

The answer will be in units of feet. To convert the answer to units of meters, see the equation below:

$$hm=0.3048\times h_{alt}$$