Convert Kilojoules to Petajoules
Convert Kilojoules (kJ) to Petajoules (PJ) instantly and accurately.
Conversion Formula
PJ = kJ × 1.000000000e-12
About Kilojoules
A kilojoule (kJ) is exactly 1,000 J and is the standard energy unit for food and physical chemistry. EU, Australian, and NZ food labels are mandatory in kJ: recommended adult intake is ~8,400 kJ/day. Bond dissociation energies: C-H bond 413 kJ/mol; C=C double bond 614 kJ/mol; N≡N triple bond 945 kJ/mol. Specific heat of water: 4.184 kJ/(kg·K). A cyclist riding at 150 W for one hour expends 540 kJ. Charpy and Izod impact toughness tests record results in J and kJ. 1 kJ = 1,000 J = 239.0 cal = 0.94782 BTU = 0.27778 Wh.
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
| Kilojoules (kJ) | Petajoules (PJ) |
|---|---|
| 1 kJ | 1 × 10-12 PJ |
| 2 kJ | 2 × 10-12 PJ |
| 5 kJ | 5 × 10-12 PJ |
| 10 kJ | 1 × 10-11 PJ |
| 25 kJ | 2.5 × 10-11 PJ |
| 50 kJ | 5 × 10-11 PJ |
| 100 kJ | 1 × 10-10 PJ |