An electronvolt is the energy gained by an electron across one volt.
Electronvolts to kWhs Converter — eV to kWh
Convert Electronvolt (eV) to kWh (kWh) using the exact conversion factor (1 electronvolt = 4.450491e-26 kwh). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Electronvolts to kWhs 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.
A kilowatt-hour is 3.6 million joules.
Result = input x 1.60217663e-19 / 3.6e+6.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Electronvolts to kWhs
Electronvolt and kWh both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Electronvolt is typically associated with standard unit throughout particle physics, atomic physics, and chemistry worldwide, while kWh is typically associated with used worldwide for electricity billing.
Formula
kwhs = electronvolts × 4.450491e-26
This factor comes from each unit's defined relationship to the category's base unit: 1 electronvolt equals 1.602177e-19 base units, and 1 kwh equals 3600000 base units, so dividing one by the other gives the direct electronvolt-to-kwh factor of 4.450491e-26.
Simple example
1 eV × 4.450491e-26 = 4.450491e-26 kWh
1 electronvolt = 4.450491e-26 kwhs.
Real-world example
100 eV × 4.450491e-26 = 4.450491e-24 kWh
100 electronvolts = 4.450491e-24 kwhs.
Conversion table
| Electronvolt (eV) | kWh (kWh) |
|---|---|
| 1 eV | 4.450491e-26 kWh |
| 10 eV | 4.450491e-25 kWh |
| 100 eV | 4.450491e-24 kWh |
| 500 eV | 2.225245e-23 kWh |
| 1,000 eV | 4.450491e-23 kWh |
| 2,000 eV | 8.900981e-23 kWh |
Reverse conversion: kWh to Electronvolt
4.450491e-26 kWh × 2.246943e+25 = 1.000000079 eV
4.450491e-26 kwhs = 1.000000079 electronvolts.
electronvolts = kwhs × 2.246943e+25
For a page dedicated to this direction, see kWh to Electronvolt.
Electronvolt vs. kWh
| Aspect | Electronvolt | kWh |
|---|---|---|
| Family | non-SI unit accepted for use with the SI, common in physics | Non-SI unit accepted for use with SI |
| Typical use | Particle physics (particle accelerator energies are often quoted in GeV or TeV) | Residential and commercial electricity billing worldwide |
| Where it's used | Standard unit throughout particle physics, atomic physics, and chemistry worldwide | Used worldwide for electricity billing |
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
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.
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.
kWh — sources
- BIPM SI Brochure — Non-SI units accepted for use with SI — Lists the kilowatt-hour among accepted non-SI energy units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kwhs are in 1 electronvolt?
1 electronvolt equals 4.450491e-26 kwhs, using the exact defined conversion factor rather than an estimate.
How do I convert electronvolt to kwh?
Multiply the electronvolt value by 4.450491e-26. The converter above does this instantly to whatever precision you set.
How do I convert kwh back to electronvolt?
Use the reverse factor: 1 kwh equals 2.246943e+25 electronvolts. You can also use the swap control in the converter above to flip the direction instantly.
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.
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.
Is the electronvolt to kwh conversion exact?
Yes. A kilowatt-hour is the energy of one kilowatt of power sustained for one hour: exactly 3,600,000 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 electronvolt still used today?
Standard unit throughout particle physics, atomic physics, and chemistry worldwide