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Water Boiling Point at Altitude Calculator

Estimate the boiling point of water at your elevation.

Result

Boiling Point
202.2°F (94.6°C)

At high altitude, water boils at a lower temperature, so food takes longer to cook by boiling or simmering - above about 3,000 ft, recipes often need extended cooking times or adjusted leavening.

About the Boiling Point at Altitude

Water doesn't boil at a fixed 212°F everywhere, it boils wherever its vapor pressure matches the surrounding air pressure, and air pressure drops steadily as elevation increases, which is why cooking at altitude behaves differently than at sea level.

How It Works

Enter your elevation in feet, and the calculator applies a standard adjustment of about 0.98°F drop in boiling point for every 500 feet of elevation gain, then converts the result to Celsius as well.

boiling point (°F) = 212 − (elevation ÷ 500) × 0.98

Examples

Denver, at about 5,280 feet

At 5,000 feet, water boils at about 202.2°F (94.5°C), noticeably below sea level's 212°F.

A mountain town at 8,000 feet

At 8,000 feet, water boils at about 196.3°F (91.3°C), which is why high-altitude recipes often call for extended simmer or boil times.

Advantages

  • Gives both Fahrenheit and Celsius results from a single elevation input
  • Uses the standard, widely cited altitude adjustment rate
  • Explains the practical cooking impact, not just the raw temperature number

Common Mistakes

  • Assuming water always boils at 212°F regardless of elevation
  • Not extending simmer or boil times at high altitude to compensate for the lower cooking temperature
  • Overlooking that baking, not just boiling, also needs separate high-altitude adjustments above about 3,000 feet

Edge Cases to Watch For

  • This is a widely used approximation, not a laboratory-exact figure; actual boiling point at a given elevation can vary slightly with weather and barometric pressure on a given day.
  • A lower boiling point means food cooked by boiling or simmering, pasta, rice, beans, takes noticeably longer at high altitude, since the water is doing less thermal work per degree than at sea level.
  • Above roughly 3,000 feet, baking recipes often need separate adjustments too, like reduced leavening or increased liquid, which this calculator doesn't cover since it only addresses boiling point.

Common Use Cases

  • Planning cook times for pasta, rice, or beans at a high-altitude home or vacation location
  • Understanding why a recipe written at sea level underperforms at elevation
  • General reference for how atmospheric pressure affects cooking
Written & fact-checked by the Calculateus TeamLast updated August 5, 2026How we verify our formulas

Frequently asked questions

Why does altitude affect boiling point?

Boiling happens when a liquid's vapor pressure equals the surrounding atmospheric pressure - air pressure drops as elevation increases, so water reaches that point at a lower temperature, which is why high-altitude cooking often takes longer.

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Conclusion

Boiling point isn't a fixed constant, it's a function of atmospheric pressure, and that single fact explains why the same pot of water behaves differently in Denver than it does in Miami. Knowing the adjusted boiling point at a given elevation makes it much clearer why high-altitude recipes call for extra time on the stovetop.