Convert Feet of Water to Petapascals
Convert Feet of Water (ftH₂O) to Petapascals (PPa) instantly and accurately.
Conversion Formula
PPa = ftH₂O × 2.989066920e-12
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 Petapascals
A petapascal (PPa) = 10¹⁵ Pa - pressures found in stellar interiors. The Sun's centre is ~25 PPa, sustained by radiation pressure from nuclear fusion balanced against gravity. White dwarf stars: ~10⁴ PPa (electron degeneracy). Neutron stars: ~10⁹-10¹⁰ PPa, where nuclear structure fails and neutrons drip from nuclei at ~4 × 10⁸ PPa (the neutron drip line). The hadron-quark phase transition in the densest neutron star cores is estimated at 10¹⁰-10¹² PPa. No laboratory experiment can approach petapascal pressures. 1 PPa = 10¹⁵ Pa.
Quick Reference Table
| Feet of Water (ftH₂O) | Petapascals (PPa) |
|---|---|
| 1 ftH₂O | 2.989 × 10-12 PPa |
| 2 ftH₂O | 5.978 × 10-12 PPa |
| 5 ftH₂O | 1.495 × 10-11 PPa |
| 10 ftH₂O | 2.989 × 10-11 PPa |
| 25 ftH₂O | 7.473 × 10-11 PPa |
| 50 ftH₂O | 1.495 × 10-10 PPa |
| 100 ftH₂O | 2.989 × 10-10 PPa |