Boiling Point at Altitude Calculator
Fill in the value and the answer updates as you type.
How the Boiling Point at Altitude Calculator works
Air pressure falls with elevation: P = 101.325 × (1 − 2.25577×10⁻⁵ × elevation)^5.25588 kPa. Water boils when its vapor pressure equals air pressure, found here with the Antoine equation. Water boils at about 100 °C at sea level and roughly 3 °C lower for every 1,000 m. Food cooks more slowly in water that boils at a lower temperature, so allow more time and fuel in the mountains. This is a standard-atmosphere estimate. Example: with Elevation above sea level 2500 m, the result is Boiling point of water (°C) = 91.7; Boiling point of water (°F) = 197.06; Boiling point drop from sea level (°C) = 8.3.
Inputs and results
The Boiling Point at Altitude Calculator takes 1 input and gives 4 results.
What you enter
- Elevation above sea level (m) — starts at 2500.
What you get
- Boiling point of water (°C)
- Boiling point of water (°F)
- Boiling point drop from sea level (°C)
- Air pressure (kPa)
Example: Boiling Point at Altitude Calculator with the starting values
With elevation above sea level 2500 m, the calculator returns:
| Boiling point of water (°C) | 91.7 |
|---|---|
| Boiling point of water (°F) | 197.06 |
| Boiling point drop from sea level (°C) | 8.3 |
| Air pressure (kPa) | 74.68 |
Change any value above and the results update straight away.
Boiling Point at Altitude Calculator FAQ
How do I use the Boiling Point at Altitude Calculator?
Enter elevation above sea level in the fields, then read boiling point of water (°c), boiling point of water (°f), boiling point drop from sea level (°c) and air pressure (kpa) in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Boiling Point at Altitude Calculator calculate?
Boiling temperature of water at any elevation. It returns boiling point of water (°c), boiling point of water (°f), boiling point drop from sea level (°c) and air pressure (kpa) from the 1 value you provide.
What values does the Boiling Point at Altitude Calculator start with?
It opens with elevation above sea level 2500 m so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Boiling Point at Altitude Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Boiling Point at Altitude Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.