Convert Petapascals to Inches of Water
Convert Petapascals (PPa) to Inches of Water (inH₂O) instantly and accurately.
Conversion Formula
inH₂O = PPa × 4014630760000
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.
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
| Petapascals (PPa) | Inches of Water (inH₂O) |
|---|---|
| 1 PPa | 4.015 × 1012 inH₂O |
| 2 PPa | 8.029 × 1012 inH₂O |
| 5 PPa | 2.007 × 1013 inH₂O |
| 10 PPa | 4.015 × 1013 inH₂O |
| 25 PPa | 1.004 × 1014 inH₂O |
| 50 PPa | 2.007 × 1014 inH₂O |
| 100 PPa | 4.015 × 1014 inH₂O |