Calculate barometric pressure, station pressure, or sea-level adjusted pressure. Enter elevation, temperature, and a known pressure value to estimate pressure in PSI, kPa, hPa, mbar, inHg, mmHg, atm, and bar.
Known pressure:
Enter either sea-level barometric pressure or station pressure at your elevation.
Elevation:
Enter the height above or below sea level so the calculator can adjust pressure between station and sea-level values.
Result:
The calculator converts the result into common barometric units including hPa, mbar, inHg, PSI, kPa, mmHg, bar, and atm.
A barometric pressure calculator is useful for weather tracking, altitude pressure estimates, hiking, aviation examples, science lessons, pressure conversions, and comparing station pressure to sea-level pressure.
Barometric pressure changes with weather, elevation, temperature, and local conditions, so this is an estimate.
A standard atmosphere adjustment can be estimated with:
P = P₀ × (1 - Lh / T₀)5.255
Standard sea-level barometric pressure is 1013.25 hPa, 29.92 inHg, 101.325 kPa, 14.696 PSI, or 1 atmosphere.
Station pressure is actual pressure at elevation. Barometric pressure in weather reports is usually adjusted to sea level for comparison.
Yes. Actual station pressure decreases as elevation increases because there is less air above the measuring point.
Low barometric pressure is often associated with clouds, wind, storms, or unsettled weather, though local conditions can vary.