Boiling Point at Altitude
Find how altitude lowers the boiling point of water.
About Boiling Point at Altitude
Air pressure falls with altitude, so water boils at a lower temperature, about one degree cooler per three hundred meters. At altitude, food cooks slower because the water is cooler, which matters for pasta, eggs and canning schedules.
Formula
Boiling Point at Altitude
Boiling point C = 100 - altitude(m) / 300
- altitude
- Height above sea level in meters
Worked example
With the default values below, Boiling Point at Altitude returns Boiling Point of 95.0. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Altitudeminimum 0 m
- 1,500 m
Results
- Boiling Point
- 95.0 C
- Boiling Point
- 203.0 F
- Cooking Note
- Water boils notably cooler; extend simmer times
Step by step
- 1Values used
- 2Boiling Point at Altitude
- 3Boiling Point= 95.0 C
- 4Boiling Point= 203.0 F
- 5Cooking Note= Water boils notably cooler; extend simmer times
Assumptions and limits
- The result is derived only from the single input listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Boiling Point at Altitude calculated?
Boiling point C = 100 - altitude(m) / 300 Air pressure falls with altitude, so water boils at a lower temperature, about one degree cooler per three hundred meters.
Why does Boiling Point at Altitude matter?
At altitude, food cooks slower because the water is cooler, which matters for pasta, eggs and canning schedules.
What values do I need to enter?
This calculator takes 1 input: Altitude. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.