Sea Level Pressure Calculator

Convert between station and sea-level pressure with a simple isothermal barometric approximation.

Mode

Pressure (hPa)

Elevation (m)

Mean air temperature (°C)

—Converted pressure

—Pascals

—inHg

—Pressure difference

Simple isothermal barometric reduction. Operational meteorological sea-level pressure reductions can use more detailed temperature/humidity assumptions and station procedures.

Weather calculations run locally in your browser. These tools transform observations with stated formulas; they do not replace official forecasts, alerts, measurements, or professional field instruments.

How to use this Sea Level Pressure Calculator

Estimate sea-level pressure from station pressure, elevation, and air temperature. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.