How to use the atmospheric pressure at altitude calculator
Estimate pressure at a given elevation. Enter altitude in the field above; the pressure are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “atmospheric pressure calculator”, “air pressure altitude calculator”, “air pressure on a mountain”, “barometric formula”, “pressure vs height”.
Formula
Variables
- h — Altitude (m)
Worked example
With altitude = 3000 m, the calculator gives pressure ≈ 70.10852 kPa; pressure ≈ 701.0852 hPa; pressure ≈ 69.19173 % of sea level.
Tips for accurate results
- Enter altitude in metres above sea level.
- The barometric formula describes the standard atmosphere, which is accurate for typical conditions up to about 11 km.
- Local weather changes pressure by a few percent, so the result is a standard-atmosphere estimate.
Common mistakes
- Entering altitude in feet while the field expects metres.
- Using the result as a weather forecast instead of a standard-atmosphere estimate.
- Comparing with a station pressure that has already been corrected to sea level.
Frequently asked questions
What is the atmospheric pressure at altitude calculator used for?
Estimate pressure at a given elevation. It helps with questions such as “atmospheric pressure calculator”, “air pressure altitude calculator”, “air pressure on a mountain”.
What is the formula for the atmospheric pressure at altitude calculation?
Pressure (kPa) = 101.325 × (1-2.25577e-5 × h)^5.25588. Pressure (hPa) = [Pressure] × 10. Pressure (% of sea level) = 100 × [Pressure] / 101.325. Here h is altitude (m).
What inputs do I need for the atmospheric pressure at altitude calculator?
You need altitude in m. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the atmospheric pressure at altitude calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the atmospheric pressure at altitude result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.