Calculate the boiling point of water based on atmospheric pressure. Lower pressure causes water to boil at a lower temperature, which is why boiling points change with altitude.
Common Boiling Point References
Why Boiling Point Changes
High Pressure
Higher boiling point
Low Pressure
Lower boiling point
High Altitude
Water boils sooner
Cooking
May take longer at altitude
Related Tools
Altitude Pressure
Estimate pressure from elevation
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Pressure Converter
Convert hPa, inHg, mmHg and PSI
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About Boiling Point and Pressure
Water boils when its vapor pressure matches the surrounding atmospheric pressure. At sea level, this usually happens at 100°C or 212°F. When atmospheric pressure is lower, water reaches that point at a lower temperature.
This is why cooking times often change at high elevations and why pressure plays an important role in science, weather, and everyday kitchen use. This calculator provides an estimate of the boiling point of water from pressure readings.