How to Convert Kilowatt-hours to Electronvolts (kWh to eV)
Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU. This guide shows how to convert kilowatt-hours into electronvolts by hand, with examples and a quick-reference table.
The conversion
To convert kilowatt-hours to electronvolts, multiply the value by 2.246943e+25. To go the other way, divide by the same number (or multiply by 4.450491e-26). For a quick estimate, multiply by about 22,000,000,000,000,000,704,643,072.
Electronvolts = kilowatt-hours × 2.246943e+25
Worked examples
- 3 kWh = 6.740830e+25 eV
- 12.5 kWh = 2.808679e+26 eV
- 75 kWh = 1.685207e+27 eV
Kilowatt-hours to Electronvolts table
| Kilowatt-hours | Electronvolts |
|---|---|
| 1 kWh | 2.246943e+25 eV |
| 2 kWh | 4.493887e+25 eV |
| 5 kWh | 1.123472e+26 eV |
| 10 kWh | 2.246943e+26 eV |
| 20 kWh | 4.493887e+26 eV |
| 25 kWh | 5.617358e+26 eV |
| 50 kWh | 1.123472e+27 eV |
| 100 kWh | 2.246943e+27 eV |
| 250 kWh | 5.617358e+27 eV |
| 500 kWh | 1.123472e+28 eV |
| 1,000 kWh | 2.246943e+28 eV |
Common questions
Is kWh to eV exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Electronvolts to Kilowatt-hours converter.
Mistakes to avoid
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Background
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
For any value, use the Kilowatt-hours to Electronvolts Converter or browse all energy converters.
Run your own numbers: Kilowatt-hours to Electronvolts Converter