How to convert nanometers to electronvolts
eV = 1,239.841984 ÷ nmNanometers and electronvolts are inversely related: when one goes up the other goes down. Divide 1,239.841984 by the value — do not multiply.
Worked examples
- 100 nanometers1,239.841984 ÷ 100 = 12.39841984 eV
- 400 nanometers1,239.841984 ÷ 400 = 3.099604961 eV
- 550 nanometers1,239.841984 ÷ 550 = 2.254258153 eV
- 650 nanometers1,239.841984 ÷ 650 = 1.907449207 eV
- 800 nanometers1,239.841984 ÷ 800 = 1.54980248 eV
Nanometers to electronvolts conversion table
Values are calculated by the conversion engine using the full formula and rounded to 8 significant figures.
| Nanometers (nm) | Electronvolts (eV) |
|---|---|
| 1 nm | 1,239.842 eV |
| 10 nm | 123.9842 eV |
| 100 nm | 12.39842 eV |
| 200 nm | 6.1992099 eV |
| 300 nm | 4.1328066 eV |
| 400 nm | 3.099605 eV |
| 450 nm | 2.7552044 eV |
| 500 nm | 2.479684 eV |
| Nanometers (nm) | Electronvolts (eV) |
|---|---|
| 550 nm | 2.2542582 eV |
| 600 nm | 2.0664033 eV |
| 650 nm | 1.9074492 eV |
| 700 nm | 1.7712028 eV |
| 750 nm | 1.6531226 eV |
| 800 nm | 1.5498025 eV |
| 1,000 nm | 1.239842 eV |
About the units
Nanometer (nm)
Optical wavelengths are given in nm: green light is about 530 nm. It is inversely related to hertz: Hz = 2.99792458×10¹⁷ ÷ value.
Electronvolt (eV)
Photon energy E = hf; 1 eV corresponds to about 241.8 THz or 1,239.84 nm. One electronvolt equals 241,798,924,200,000 hertz (Hz).
Frequently asked questions
What is the formula to convert nanometers to electronvolts?
eV = 1,239.841984 ÷ nm. Nanometers and electronvolts are inversely related: when one goes up the other goes down. Divide 1,239.841984 by the value — do not multiply.
What is 400 nanometers in electronvolts?
400 nm = 3.099604961 eV.
Why is this not a simple multiplication?
One unit measures the quantity directly and the other measures its inverse, so a larger value in one means a smaller value in the other. That is why the formula divides a constant by your value.
Is this nm to eV converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.