Convert Nanojoules to Joules
Convert Nanojoules (nJ) to Joules (J) instantly and accurately.
Conversion Formula
J = nJ × 1.000000000e-9
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.
About Joules
The joule (J) is the SI unit of energy, defined as one newton acting through one metre (1 J = 1 N·m = 1 kg·m²/s²). Named after James Prescott Joule, whose 1840s paddle-wheel experiments established the mechanical equivalent of heat (~4.15 J = 1 calorie). One joule is modest: it lifts a 100 g apple by 1 m, heats 0.239 mL of water by 1°C, or powers a 1 W LED for 1 second. Daily adult resting metabolism is ~6-9 MJ. 1 J = 1 W·s = 0.23901 cal = 9.4782 × 10⁻⁴ BTU = 2.7778 × 10⁻⁷ kWh.
Quick Reference Table
| Nanojoules (nJ) | Joules (J) |
|---|---|
| 1 nJ | 1 × 10-9 J |
| 2 nJ | 2 × 10-9 J |
| 5 nJ | 5 × 10-9 J |
| 10 nJ | 1 × 10-8 J |
| 25 nJ | 2.5 × 10-8 J |
| 50 nJ | 5 × 10-8 J |
| 100 nJ | 1 × 10-7 J |