Convert Petapascals to Technical Atmospheres
Convert Petapascals (PPa) to Technical Atmospheres (at) instantly and accurately.
Conversion Formula
at = PPa × 10197162130
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 Technical Atmospheres
One technical atmosphere (at) = exactly 1 kgf/cm² = 98,066.5 Pa ≈ 0.968 standard atmospheres. The metric technical pressure unit used in pre-SI European and Japanese engineering for boilers, hydraulic cylinders, and compressed gas systems. A steam boiler at 10 at operates at 0.981 MPa; hydraulic presses are rated at 200-600 at. Still used parenthetically in old German and Japanese machinery manuals and standards (DIN 1301-3 legacy). Converts simply from kgf/cm²: 1 at ≡ 1 kgf/cm². 1 at = 98,066.5 Pa.
Quick Reference Table
| Petapascals (PPa) | Technical Atmospheres (at) |
|---|---|
| 1 PPa | 1.02 × 1010 at |
| 2 PPa | 2.039 × 1010 at |
| 5 PPa | 5.099 × 1010 at |
| 10 PPa | 1.02 × 1011 at |
| 25 PPa | 2.549 × 1011 at |
| 50 PPa | 5.099 × 1011 at |
| 100 PPa | 1.02 × 1012 at |