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Air Pressure at Altitude Calculator — result sheet
Estimate pressure at altitude with an isothermal ideal-gas atmosphere model.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: P(h) = P₀ exp(−Mgh/(RT)).
The exponential model treats temperature as constant and uses dry-air molar mass, standard gravity, and the gas constant.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Reference pressure — Pa; minimum 1.0E-6; maximum 2000000
- Altitude — m; minimum 0; maximum 50000
- Absolute temperature — K; minimum 1; maximum 1000
Worked example
| Input | Value |
|---|---|
| Reference pressure | 101325 |
| Altitude | 1000 |
| Absolute temperature | 288.15 |
Pressure ≈ 89,997 Pa.
Assumptions and limits
- Temperature is absolute Kelvin and constant over the altitude interval.
- The atmosphere is treated as dry ideal gas with fixed composition.
- Weather, humidity, terrain, and standard-atmosphere lapse rates 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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