Electronvolts (eV) to Watt-Hours (Wh) Converter
Enter a value to instantly convert between energy units.
1 Electronvolt = 4.4505e-23 Watt-Hour
Key Formulas
Kilocalorie → Kilojoule
kJ = kcal × 4.184Kilojoule → Kilocalorie
kcal = kJ × 0.239006Kilowatt-Hour → Joule
J = kWh × 3600000Joule → Kilowatt-Hour
kWh = J × 2.77778e-7Formula
Wh = eV × 4.4505e-23One electronvolt equals 4.450×10⁻²³ watt-hours. Since 1 eV = 1.602×10⁻¹⁹ J and 1 Wh = 3600 J, the conversion is 1.602×10⁻¹⁹/3600 = 4.45×10⁻²³ Wh. This connects atomic-scale energy to electrical units.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A physicist noting that 10²² eV equals 0.445 Wh — atomic to electrical scale.
1e+22 eV = 0.44505 Wh
A researcher calculating 10²¹ eV of energy as 0.0445 Wh for the quantum paper.
1e+21 eV = 0.0445 Wh
A student verifying that 6.242×10²¹ eV (1 kJ equivalent) equals 0.278 Wh for homework.
6.242e+21 eV = 0.278 Wh
An engineer analyzing 10²⁰ eV as 0.00445 Wh for the particle physics comparison.
100000000000000000000 eV = 0.00445 Wh