How it works
A walkthrough, end to end.
- 1
Enter your altitude in feet or meters.
- 2
The calculator estimates atmospheric pressure and boiling point.
- 3
Output in °F and °C.
Reference
Boiling point
Atmospheric pressure decreases ~0.034 in Hg per 100 m. Each 1°F drop in BP corresponds to ~540 ft of altitude.
Use cases
What you can do with this.
High-altitude cooking
Recipes need longer cook times above 5,000 ft.
Pressure canning
Adjust pressure for elevation safety.
Coffee brewing
Lower BP changes extraction temperature.
Camping
Plan boil times in mountain campsites.
Brewing & distilling
BP affects ethanol/water separation.
FAQ
Frequently asked.
Within ~1°F up to ~10,000 ft.
This calculator is water-specific. Other liquids have different vapor-pressure curves.
No. All math runs in your browser.
Water boils at 100°C / 212°F at standard 1 atm pressure.