Convert Kilojoules to Nanojoules
Convert Kilojoules (kJ) to Nanojoules (nJ) instantly and accurately.
Conversion Formula
nJ = kJ × 1000000000000
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 Nanojoules
A nanojoule (nJ) is 10⁻⁹ J - the scale of ultrashort laser pulses, flash memory write operations, and cellular ATP reserves. A Ti:sapphire laser oscillator produces pulses of 1-20 nJ at 80 MHz. Flash NAND programming costs ~1-10 nJ/bit written; a read is ~0.1 nJ/bit. The total ATP energy stored in a single red blood cell is ~1-5 nJ. The kinetic energy of a 1 µg particle at 1.4 m/s is ~1 nJ, illustrating that nanojoules describe real nanoscale mechanical events. 1 nJ = 10⁻⁹ J.
Quick Reference Table
| Kilojoules (kJ) | Nanojoules (nJ) |
|---|---|
| 1 kJ | 1 × 1012 nJ |
| 2 kJ | 2 × 1012 nJ |
| 5 kJ | 5 × 1012 nJ |
| 10 kJ | 1 × 1013 nJ |
| 25 kJ | 2.5 × 1013 nJ |
| 50 kJ | 5 × 1013 nJ |
| 100 kJ | 1 × 1014 nJ |