Attojoule is 1e-18 joule units.
Attojoules to Electronvolts Converter — aJ to eV
Convert Attojoule (aJ) to Electronvolt (eV) using the exact conversion factor (1 attojoule = 6.241509074 electronvolt). See the formula, worked examples, conversion table, and common uses.
Attojoules 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 1e-18 / 1.60217663e-19.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Attojoules to Electronvolts
Attojoule and Electronvolt both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Attojoule is 1e-18 joule units, and an electronvolt is the energy gained by an electron across one volt.
Formula
electronvolts = attojoules × 6.24150907446
This factor comes from each unit's defined relationship to the category's base unit: 1 attojoule equals 1e-18 base units, and 1 electronvolt equals 1.602177e-19 base units, so dividing one by the other gives the direct attojoule-to-electronvolt factor of 6.24150907446.
Simple example
1 aJ × 6.241509074 = 6.241509074 eV
1 attojoule = 6.241509074 electronvolts.
Real-world example
100 aJ × 6.241509074 = 624.1509074 eV
100 attojoules = 624.1509074 electronvolts.
Conversion table
| Attojoule (aJ) | Electronvolt (eV) |
|---|---|
| 1 aJ | 6.241509074 eV |
| 10 aJ | 62.41509074 eV |
| 100 aJ | 624.1509074 eV |
| 500 aJ | 3,120.754537 eV |
| 1,000 aJ | 6,241.509074 eV |
| 2,000 aJ | 12,483.01815 eV |
Reverse conversion: Electronvolt to Attojoule
6.241509074 eV × 0.1602176634 = 0.9999999999 aJ
6.241509074 electronvolts = 0.9999999999 attojoules.
attojoules = electronvolts × 0.1602176634
For a page dedicated to this direction, see Electronvolt to Attojoule.
Understanding the Attojoule (aJ)
Attojoule is 1e-18 joule units.
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
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 attojoule?
1 attojoule equals 6.241509074 electronvolts, using the exact defined conversion factor rather than an estimate.
How do I convert attojoule to electronvolt?
Multiply the attojoule value by 6.241509074. The converter above does this instantly to whatever precision you set.
How do I convert electronvolt back to attojoule?
Use the reverse factor: 1 electronvolt equals 0.1602176634 attojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a attojoule?
Attojoule (aJ) is a unit of energy.
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 attojoule 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.