Convert Megajoules to Petajoules
Convert Megajoules (MJ) to Petajoules (PJ) instantly and accurately.
Conversion Formula
PJ = MJ × 1.000000000e-9
About Megajoules
A megajoule (MJ) is 10⁶ J - the scale of fuel combustion in vehicles and kinetic energy of road traffic. Energy content: 1 L diesel ~34.9 MJ; 1 L petrol ~32.2 MJ. A 1,500 kg car at 100 km/h has KE = ½ × 1,500 × 27.78² ≈ 0.579 MJ; at 200 km/h it carries 2.31 MJ - explaining crash severity's quadratic speed dependence. A 60 kWh EV battery stores 60 × 3.6 = 216 MJ. Detonation of 1 kg TNT releases 4.184 MJ. Adults at rest metabolise ~6-9 MJ/day. 1 MJ = 10⁶ J = 239.0 kcal = 0.27778 kWh = 947.8 BTU.
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
| Megajoules (MJ) | Petajoules (PJ) |
|---|---|
| 1 MJ | 1 × 10-9 PJ |
| 2 MJ | 2 × 10-9 PJ |
| 5 MJ | 5 × 10-9 PJ |
| 10 MJ | 1 × 10-8 PJ |
| 25 MJ | 2.5 × 10-8 PJ |
| 50 MJ | 5 × 10-8 PJ |
| 100 MJ | 1 × 10-7 PJ |