A kilowatt-hour is 3.6 million joules.
kWhs to Electronvolts Converter — kWh to eV
Convert kWh (kWh) to Electronvolt (eV) using the exact conversion factor (1 kwh = 2.246943e+25 electronvolt). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
kWhs to Electronvolts converter
Converter
Energy Converter
Convert joules, calories, kilowatt-hours, BTU, electronvolts, therms, and mechanical work units.
Context values
Some unit families need one extra value for a physically accurate result.
An electronvolt is the energy gained by an electron across one volt.
Result = input x 3.6e+6 / 1.60217663e-19.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting kWhs to Electronvolts
kWh and Electronvolt both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). kWh is typically associated with used worldwide for electricity billing, while Electronvolt is typically associated with standard unit throughout particle physics, atomic physics, and chemistry worldwide.
Formula
electronvolts = kwhs × 2.246943e+25
This factor comes from each unit's defined relationship to the category's base unit: 1 kwh equals 3600000 base units, and 1 electronvolt equals 1.602177e-19 base units, so dividing one by the other gives the direct kwh-to-electronvolt factor of 2.246943e+25.
Simple example
1 kWh × 2.246943e+25 = 2.246943e+25 eV
1 kwh = 2.246943e+25 electronvolts.
Real-world example
100 kWh × 2.246943e+25 = 2.246943e+27 eV
100 kwhs = 2.246943e+27 electronvolts.
Conversion table
| kWh (kWh) | Electronvolt (eV) |
|---|---|
| 1 kWh | 2.246943e+25 eV |
| 10 kWh | 2.246943e+26 eV |
| 100 kWh | 2.246943e+27 eV |
| 500 kWh | 1.123472e+28 eV |
| 1,000 kWh | 2.246943e+28 eV |
| 2,000 kWh | 4.493887e+28 eV |
Reverse conversion: Electronvolt to kWh
2.246943e+25 eV × 4.450491e-26 = 0.9999998813 kWh
2.246943e+25 electronvolts = 0.9999998813 kwhs.
kwhs = electronvolts × 4.450491e-26
For a page dedicated to this direction, see Electronvolt to kWh.
kWh vs. Electronvolt
| Aspect | kWh | Electronvolt |
|---|---|---|
| Family | Non-SI unit accepted for use with SI | non-SI unit accepted for use with the SI, common in physics |
| Typical use | Residential and commercial electricity billing worldwide | Particle physics (particle accelerator energies are often quoted in GeV or TeV) |
| Where it's used | Used worldwide for electricity billing | Standard unit throughout particle physics, atomic physics, and chemistry worldwide |
Understanding the kWh
kWh (kWh) measures energy. A kilowatt-hour is the energy of one kilowatt of power sustained for one hour: exactly 3,600,000 joules. It is classified as a Non-SI unit accepted for use with SI.
Where it's used: Used worldwide for electricity billing
Uses of the kWh today
- Residential and commercial electricity billing worldwide
- Battery capacity ratings (especially electric vehicles)
- Energy policy and grid-scale power statistics
History of the kWh
The kilowatt-hour became the standard electricity billing unit as power utilities expanded in the late 19th and early 20th centuries, since it conveniently matches the scale of typical household electricity consumption, unlike the much smaller joule.
Historical origin. kWh was not the invention of a single named person; it developed through the process described above.
Understanding the Electronvolt
Electronvolt (eV) measures energy. The energy gained by a single electron accelerated through an electric potential difference of one volt — a very small amount of energy, exactly 1.602176634 × 10⁻¹⁹ joules. It is classified as a non-SI unit accepted for use with the SI, common in physics.
Where it's used: Standard unit throughout particle physics, atomic physics, and chemistry worldwide
Uses of the Electronvolt today
- Particle physics (particle accelerator energies are often quoted in GeV or TeV)
- Atomic and molecular energy levels
- Semiconductor band-gap energies
kWh — sources
- BIPM SI Brochure — Non-SI units accepted for use with SI — Lists the kilowatt-hour among accepted non-SI energy units.
Electronvolt — sources
- BIPM SI Brochure, 9th edition — Electronvolt listed as a non-SI unit accepted for use with the SI, with its exact value fixed via the elementary charge.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many electronvolts are in 1 kwh?
1 kwh equals 2.246943e+25 electronvolts, using the exact defined conversion factor rather than an estimate.
How do I convert kwh to electronvolt?
Multiply the kwh value by 2.246943e+25. The converter above does this instantly to whatever precision you set.
How do I convert electronvolt back to kwh?
Use the reverse factor: 1 electronvolt equals 4.450491e-26 kwhs. You can also use the swap control in the converter above to flip the direction instantly.
What is a kwh?
kWh (kWh) measures energy. A kilowatt-hour is the energy of one kilowatt of power sustained for one hour: exactly 3,600,000 joules. It is classified as a Non-SI unit accepted for use with SI.
What is a electronvolt?
Electronvolt (eV) measures energy. The energy gained by a single electron accelerated through an electric potential difference of one volt — a very small amount of energy, exactly 1.602176634 × 10⁻¹⁹ joules. It is classified as a non-SI unit accepted for use with the SI, common in physics.
Is the kwh to electronvolt conversion exact?
Yes. The energy gained by a single electron accelerated through an electric potential difference of one volt — a very small amount of energy, exactly 1.602176634 × 10⁻¹⁹ joules. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the kwh still used today?
Used worldwide for electricity billing