Convert Feet of Water to Kilobars
Convert Feet of Water (ftH₂O) to Kilobars (kbar) instantly and accurately.
Conversion Formula
kbar = ftH₂O × 2.989066920e-5
About Feet of Water
One foot of water column (ftH₂O) ≈ 2,989 Pa - the US customary equivalent of cmH₂O used in civil and hydraulic engineering. Municipal water supply systems are designed for 40-80 psi head ≈ 92-184 ft; fire suppression sprinkler systems require minimum 7 psi ≈ 16 ft. Well pump specifications, sump pump head ratings, irrigation mainline pressure, and drainage calculations all use feet of head. 1 ft of water = 12 in WC = 0.4335 psi ≈ 2,989 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
| Feet of Water (ftH₂O) | Kilobars (kbar) |
|---|---|
| 1 ftH₂O | 2.989 × 10-5 kbar |
| 2 ftH₂O | 5.978 × 10-5 kbar |
| 5 ftH₂O | 0.000149453 kbar |
| 10 ftH₂O | 0.000298907 kbar |
| 25 ftH₂O | 0.000747267 kbar |
| 50 ftH₂O | 0.00149453 kbar |
| 100 ftH₂O | 0.00298907 kbar |