Barometric Pressure Altitude Calculator
Barometric Pressure Altitude
Estimate atmospheric pressure at a given altitude.
Formula
Pressure = Sea Level x (1 - Altitude / 145442)^5.2559
Frequently Asked Questions
How does pressure change with altitude?
Pressure decreases about 1 inHg per 1000 feet near sea level.
What is standard sea level pressure?
Standard sea level pressure is 29.92 inHg or 1013.25 mb.