Watt-hours to Electronvolts Converter
Common Conversions
| Wh | eV |
|---|---|
| 1e-25 | 0.002247 |
| 1e-22 | 2.247 |
| 1e-20 | 224.7 |
| 1e-18 | 22470 |
| 1e-15 | 22470000 |
| 1e-12 | 22470000000 |
| 1e-9 | 22470000000000 |
| 0.000001 | 22470000000000000 |
| 0.001 | 22470000000000000000 |
| 1 | 2.247e+22 |
| 1000 | 2.247e+25 |
| 1000000 | 2.247e+28 |
Why this conversion matters in chemistry
Battery-cell theoretical-energy accounting walks across this conversion every time. Try a single AA alkaline: about 2.8 Wh of stored chemical energy, sitting on a 1.5 V terminal. That works out to 6.72 × 10³ C of charge, which is roughly 4.2 × 10²² electrons each transiting the external circuit at 1.5 eV apiece. The 2.247 × 10²² eV per Wh factor falls out of two definitions stacked together: 1 eV = 1.602 × 10⁻¹⁹ J and 1 Wh = 3600 J. The conversion is the move that lets a battery-materials chemist translate cell-level Wh/g into the per-electron form a Pourbaix diagram lives in.
Formula
Worked Examples
The conversion anchor — one watt-hour in electronvolts.
One milliwatt-hour — about the energy a small coin cell stores.
One kilowatt-hour — about the household-scale energy unit.
100 milliwatt-hours — about a button-cell capacity.