Convert Electronvolts to Nanojoules
Convert Electronvolts (eV) to Nanojoules (nJ) instantly and accurately.
Conversion Formula
nJ = eV × 1.602176634e-10
About Electronvolts
An electronvolt (eV) is the kinetic energy gained by one electron accelerated through 1 volt - exactly 1.602176634 × 10⁻¹⁹ J (fixed by the 2019 SI revision). It is the natural energy unit of atomic and particle physics: visible light photons carry 1.7-3.1 eV; hydrogen ionisation requires 13.6 eV; X-ray photons span 100 eV-100 keV; protons at the LHC reach 6.5 TeV. Rest masses use eV/c²: electron 0.511 MeV, proton 938.3 MeV, Higgs boson 125 GeV. Nuclear binding energy peaks at ~8 MeV/nucleon for iron-56. 1 eV = 1.602176634 × 10⁻¹⁹ J.
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
| Electronvolts (eV) | Nanojoules (nJ) |
|---|---|
| 1 eV | 1.602 × 10-10 nJ |
| 2 eV | 3.204 × 10-10 nJ |
| 5 eV | 8.011 × 10-10 nJ |
| 10 eV | 1.602 × 10-9 nJ |
| 25 eV | 4.005 × 10-9 nJ |
| 50 eV | 8.011 × 10-9 nJ |
| 100 eV | 1.602 × 10-8 nJ |