Convert Barye to Hectopascals
Convert Barye (Ba) to Hectopascals (hPa) instantly and accurately.
Conversion Formula
hPa = Ba × 0.001
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.
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.
Quick Reference Table
| Barye (Ba) | Hectopascals (hPa) |
|---|---|
| 1 Ba | 0.001 hPa |
| 2 Ba | 0.002 hPa |
| 5 Ba | 0.005 hPa |
| 10 Ba | 0.01 hPa |
| 25 Ba | 0.025 hPa |
| 50 Ba | 0.05 hPa |
| 100 Ba | 0.1 hPa |