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Boiling Point at Altitude Calculator — result sheet
Estimate standard-atmosphere pressure and water-like boiling temperature at altitude using a barometric and Clausius–Clapeyron approximation.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: P(h)=P₀(1−Lh/T₀)^(gM/(RL)); 1/Tb(h)=1/Tb,0−(R/ΔHvap)ln(P(h)/P₀).
The estimate first uses the standard tropospheric barometric relation, then applies a two-point vapor-pressure approximation relative to the entered sea-level boiling point.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Altitude — m; minimum -500; maximum 20000
- Sea-level pressure — Pa; minimum 1000; maximum 200000
- Sea-level boiling temperature — K; minimum 250; maximum 500
- Enthalpy of vaporization — J/mol; minimum 1.0E-6; maximum 1000000
Worked example
| Input | Value |
|---|---|
| Altitude | 2000 |
| Sea-level pressure | 101325 |
| Sea-level boiling temperature | 373.15 |
| Enthalpy of vaporization | 40650 |
Standard pressure ≈ 79,496 Pa and estimated boiling temperature ≈ 366.37 K, or 93.22 °C.
Assumptions and limits
- The atmosphere follows a standard lapse rate and the liquid behaves like water near the entered reference point.
- The sea-level pressure and boiling temperature describe the same conditions and enthalpy remains constant.
- Weather, humidity, dissolved solutes, pressure-cooker conditions, and local cooking guidance are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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