Convert Ergs to Petajoules
Convert Ergs (erg) to Petajoules (PJ) instantly and accurately.
Conversion Formula
PJ = erg × 1.000000000e-22
About Ergs
An erg is the CGS unit of energy - the work done by one dyne through one centimetre - exactly 10⁻⁷ J. Despite SI adoption, the erg persists in astrophysics: the Sun's luminosity is 3.828 × 10³³ erg/s; gamma-ray burst isotropic energies are quoted in units of 10⁵¹ erg ('one foe'). Surface tension of water is 72.8 dyn/cm; the work to create 1 cm² of new water-air interface is 72.8 erg. Earthquake seismic moment M₀ is in dyn·cm = erg; the 2004 Boxing Day earthquake had M₀ ≈ 10²³ J = 10³⁰ erg. 1 erg = 10⁻⁷ J = 624.15 eV.
About Petajoules
A petajoule (PJ) is 10¹⁵ J - the national energy policy scale. IEA reports primary energy in PJ/year: Sweden ~600 PJ; Germany ~12,500 PJ; the United States ~93,000 PJ. World total primary energy supply is ~605,000 PJ = 605 EJ. The 1883 Krakatoa eruption released ~200 PJ ≈ 48 megatons TNT. A 1-megaton nuclear weapon releases 4.184 PJ. Global annual steel production embeds ~38,000-47,000 PJ of energy. 1 PJ = 10¹⁵ J = 277.78 GWh = 238.85 ktoe = 23.88 ktoe.
Quick Reference Table
| Ergs (erg) | Petajoules (PJ) |
|---|---|
| 1 erg | 1 × 10-22 PJ |
| 2 erg | 2 × 10-22 PJ |
| 5 erg | 5 × 10-22 PJ |
| 10 erg | 1 × 10-21 PJ |
| 25 erg | 2.5 × 10-21 PJ |
| 50 erg | 5 × 10-21 PJ |
| 100 erg | 1 × 10-20 PJ |