Altitude Pressure Converter
Discover how altitude changes the air around you. Enter any height in metres or feet to get the local air pressure in hPa, inHg, atm and mmHg, plus the water boiling point at that altitude — useful for travel, hiking and science projects.
Result will appear here.
How to use
- Enter the altitude or height.
- Pick metres or feet from the unit dropdown — the result updates live.
- Read the air pressure in several units and the estimated water boiling point below.
Note: The barometric formula (ISA) is used. The boiling point is a rough estimate — the real value can differ slightly with pressure and weather.
Frequently Asked Questions (FAQ)
What does the altitude pressure converter calculate?
It finds the air pressure and the water boiling point at any altitude you enter, in metres or feet.
What formula does it use?
It uses the standard barometric formula based on the International Standard Atmosphere.
How accurate is the boiling point?
The boiling point is a rough estimate; the real value can differ slightly with pressure and weather.
Is the converter free?
Yes, it is free with no signup and results appear instantly in your browser.