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Pressure ↔ Altitude Converter

Convert sea-level pressure to station pressure for any altitude using the barometric formula.

Live tool

Sea-level pressure (hPa)Altitude (m)

Station pressure

954.61 hPa

ISA standard atmosphere

Introduction & principle

Applies the International Standard Atmosphere barometric formula: P = P0 · (1 − L·h / T0)^(g·M / R·L), where L is the lapse rate.

Tool advantage

Combines both directions of conversion in one form, with explicit ISA assumptions.

Detailed usage guide

1Enter sea-level pressure (default 1013.25 hPa).
2Enter station altitude in meters or feet.
3Read the local station pressure and the implied altitude for a given measured pressure.

Common problems & FAQ

ISA assumes a fixed temperature profile. Real weather systems shift pressure by several hPa.

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