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Convert between pressure units with altitude correction and weather condition guide.
Barometric pressure is the atmospheric pressure measured by a barometer, used in weather forecasting. This converter translates between common pressure units and applies altitude correction.
| Pressure Range | Weather |
|---|---|
| < 1000 hPa / < 29.53 inHg | Stormy / Low pressure |
| 1000–1010 hPa / 29.53–29.83 inHg | Rainy / Unsettled |
| 1010–1020 hPa / 29.83–30.12 inHg | Changeable |
| 1020–1030 hPa / 30.12–30.42 inHg | Fair |
| > 1030 hPa / > 30.42 inHg | Very dry / High pressure |
Formula
P_sea = P_station × e^(h / 8434.5)P_sea = Sea-level corrected pressure (hPa)
P_station = Measured station pressure (hPa)
h = Station altitude above sea level (meters)
e = Euler's number ≈ 2.71828
Worked Example
Station at 500 m reads 960 hPa
Did you know? The lowest sea-level pressure ever recorded was 870 hPa (25.69 inHg) in Typhoon Tip on October 12, 1979 (source: WMO).
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