Convert Inches of Water to Barye
Convert Inches of Water (inH₂O) to Barye (Ba) instantly and accurately.
Conversion Formula
Ba = inH₂O × 2490.8891
About Inches of Water
One inch of water column (inH₂O or in WC) = pressure from 1 inch of fresh water at standard gravity ≈ 249.09 Pa. The standard unit for low-pressure measurement in US HVAC and plumbing: ductwork static pressure, fan performance, filter ratings, and gas appliance manifold pressures are all specified in inches WC. Household natural gas supply pressure is typically 7 in WC (0.25 psi). Blower door tests for building air-tightness use 50 Pa ≈ 0.2 in WC test pressure. 1 inH₂O = 249.089 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
| Inches of Water (inH₂O) | Barye (Ba) |
|---|---|
| 1 inH₂O | 2490.89 Ba |
| 2 inH₂O | 4981.78 Ba |
| 5 inH₂O | 12454.4 Ba |
| 10 inH₂O | 24908.9 Ba |
| 25 inH₂O | 62272.2 Ba |
| 50 inH₂O | 124544 Ba |
| 100 inH₂O | 249089 Ba |