Convert Hectopascals to Barye
Convert Hectopascals (hPa) to Barye (Ba) instantly and accurately.
Conversion Formula
Ba = hPa × 1000
About Hectopascals
A hectopascal (hPa) = 100 Pa = 1 mbar - the WMO-official SI-compatible meteorological pressure unit since 1986, replacing millibar with no numerical change. All modern surface observations (METAR, SYNOP), digital barometers, aviation weather, and weather apps report in hPa. QNH altimeter settings outside North America are in hPa. ICAO standard sea-level pressure is 1013.25 hPa. Continental high-pressure record exceeds 1084 hPa; Typhoon Tip (1979) holds the low record at ~870 hPa. 1 hPa = 100 Pa.
About Barye
The barye (Ba) is the CGS unit of pressure - 1 dyne/cm² = exactly 0.1 Pa = 1 µbar. Standard atmosphere = 1,013,250 Ba. It dominated physics and laboratory science from the mid-19th century until SI adoption. Legacy acoustic CGS literature used 1 barye (0.1 Pa) as the underwater reference pressure, creating a 100 dB offset versus the modern 1 µPa reference - a critical correction when comparing historical and modern underwater acoustics databases. Still encountered in classical fluid mechanics derivations and early 20th-century meteorological literature. 1 Ba = 0.1 Pa.
Quick Reference Table
| Hectopascals (hPa) | Barye (Ba) |
|---|---|
| 1 hPa | 1000 Ba |
| 2 hPa | 2000 Ba |
| 5 hPa | 5000 Ba |
| 10 hPa | 10000 Ba |
| 25 hPa | 25000 Ba |
| 50 hPa | 50000 Ba |
| 100 hPa | 100000 Ba |