Convert Standard Atmospheres to Petapascals
Convert Standard Atmospheres (atm) to Petapascals (PPa) instantly and accurately.
Conversion Formula
PPa = atm × 1.013250000e-10
About Standard Atmospheres
The standard atmosphere (atm) = exactly 101,325 Pa - defined by the 10th CGPM (1954) as the reference air pressure at sea level. Used to define STP (0°C and 1 atm) for gas law and thermochemistry. Chemical equilibrium constants (Kp), Henry's law solubility, and thermodynamic tables are tabulated at 1 atm. ISA aviation standard: sea-level 1 atm / 15°C, pressure halving every ~5.5 km. Diving physics: +1 atm per 10 m depth (fresh water) so 30 m = 4 atm absolute. Diamond formation in Earth's mantle: ~50,000 atm. 1 atm = 101,325 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
| Standard Atmospheres (atm) | Petapascals (PPa) |
|---|---|
| 1 atm | 1.013 × 10-10 PPa |
| 2 atm | 2.026 × 10-10 PPa |
| 5 atm | 5.066 × 10-10 PPa |
| 10 atm | 1.013 × 10-9 PPa |
| 25 atm | 2.533 × 10-9 PPa |
| 50 atm | 5.066 × 10-9 PPa |
| 100 atm | 1.013 × 10-8 PPa |