Convert Inches of Water to Kilobars
Convert Inches of Water (inH₂O) to Kilobars (kbar) instantly and accurately.
Conversion Formula
kbar = inH₂O × 2.490889100e-6
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 Kilobars
A kilobar (kbar) = 1,000 bar = 100 MPa = 10⁸ Pa - standard in high-pressure geophysics and experimental petrology. Earth mantle phase transitions: olivine → wadsleyite at ~130-140 kbar (410 km depth); post-spinel transition at ~230 kbar (660 km). Diamond anvil cells routinely reach 100-400 kbar for materials synthesis and equation-of-state measurement. High-pressure synthesis of cubic boron nitride (~50 kbar) and superhard materials uses large-volume presses. Explosive shock pressures for mining and demolition: 100-1,000 kbar. 1 kbar = 100 MPa.
Quick Reference Table
| Inches of Water (inH₂O) | Kilobars (kbar) |
|---|---|
| 1 inH₂O | 2.491 × 10-6 kbar |
| 2 inH₂O | 4.982 × 10-6 kbar |
| 5 inH₂O | 1.245 × 10-5 kbar |
| 10 inH₂O | 2.491 × 10-5 kbar |
| 25 inH₂O | 6.227 × 10-5 kbar |
| 50 inH₂O | 0.000124544 kbar |
| 100 inH₂O | 0.000249089 kbar |