Convert Bars to Inches of Water
Convert Bars (bar) to Inches of Water (inH₂O) instantly and accurately.
Conversion Formula
inH₂O = bar × 401.463076
About Bars
A bar = exactly 100,000 Pa ≈ 0.987 atm - the world standard for industrial pressure outside North America. Hydraulic systems, pneumatic equipment, gas cylinders, dive computers, and tyre gauges in Europe and Asia use bar. Scuba diving: +1 bar per 10 m depth; at 40 m recreational limit = 5 bar absolute. European tyre pressure labels show bar alongside kPa. Industrial processes: steam at 10-50 bar; high-pressure reactors 100-300 bar; water-jet cutting 1,000-4,000 bar. 1 bar = 100,000 Pa = 14.504 psi.
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.
Quick Reference Table
| Bars (bar) | Inches of Water (inH₂O) |
|---|---|
| 1 bar | 401.463 inH₂O |
| 2 bar | 802.926 inH₂O |
| 5 bar | 2007.32 inH₂O |
| 10 bar | 4014.63 inH₂O |
| 25 bar | 10036.6 inH₂O |
| 50 bar | 20073.2 inH₂O |
| 100 bar | 40146.3 inH₂O |