Convert Barye to Standard Atmospheres
Convert Barye (Ba) to Standard Atmospheres (atm) instantly and accurately.
Conversion Formula
atm = Ba × 9.869232667e-7
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 Standard Atmospheres
The standard atmosphere (atm) = exactly 101,325 Pa - defined by the 10th CGPM (1954) as the reference air pressure at sea level. Used to define STP (0°C and 1 atm) for gas law and thermochemistry. Chemical equilibrium constants (Kp), Henry's law solubility, and thermodynamic tables are tabulated at 1 atm. ISA aviation standard: sea-level 1 atm / 15°C, pressure halving every ~5.5 km. Diving physics: +1 atm per 10 m depth (fresh water) so 30 m = 4 atm absolute. Diamond formation in Earth's mantle: ~50,000 atm. 1 atm = 101,325 Pa.
Quick Reference Table
| Barye (Ba) | Standard Atmospheres (atm) |
|---|---|
| 1 Ba | 9.869 × 10-7 atm |
| 2 Ba | 1.974 × 10-6 atm |
| 5 Ba | 4.935 × 10-6 atm |
| 10 Ba | 9.869 × 10-6 atm |
| 25 Ba | 2.467 × 10-5 atm |
| 50 Ba | 4.935 × 10-5 atm |
| 100 Ba | 9.869 × 10-5 atm |