Electronvolts to Watt-Hours Converter

Enter the energy in electronvolts below to get the value converted to watt-hours.


Result in Watt-Hours:

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1 eV = 4.4505E-23 Wh
Hint: use a scientific notation calculator to convert E notation to decimal

Do you want to convert watt-hours to electronvolts?

How to Convert Electronvolts to Watt-Hours

To convert a measurement in electronvolts to a measurement in watt-hours, multiply the energy by the following conversion ratio: 4.4505E-23 watt-hours/electronvolt.

Since one electronvolt is equal to 4.4505E-23 watt-hours, you can use this simple formula to convert:

watt-hours = electronvolts × 4.4505E-23

The energy in watt-hours is equal to the energy in electronvolts multiplied by 4.4505E-23.

For example, here's how to convert 5.0E+22 electronvolts to watt-hours using the formula above.
watt-hours = (5.0E+22 eV × 4.4505E-23) = 2.225245 Wh

Electronvolts and watt-hours are both units used to measure energy. Keep reading to learn more about each unit of measure.

What Is an Electronvolt?

An electronvolt is the amount of energy required to accelerate an electron through a difference in electric potential of one volt in vacuum. One electronvolt is equal to the charge of 1.602176634 × 10−19 C, and is equal to the energy of 1.602176634 × 10−19 Joules.[1]

Electronvolts can be abbreviated as eV; for example, 1 electronvolt can be written as 1 eV.

Energy in electronvolts can be expressed using the following formula: E = qV

The energy E in electronvolts is equal to the electric charge q in elementary charge times the potential difference V in volts.

Learn more about electronvolts.

What Is a Watt-Hour?

The watt-hour is a measure of electrical energy equal to one watt of power over a one hour period.

Watt-hours are usually abbreviated as Wh, although the formally adopted expression is W·h. The abbreviation W h is also sometimes used. For example, 1 watt-hour can be written as 1 Wh, 1 W·h, or 1 W h.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.[2]

Learn more about watt-hours.

Electronvolt to Watt-Hour Conversion Table

Table showing various electronvolt measurements converted to watt-hours.
Electronvolts Watt-hours
1 eV 0.000000000000000000000044505 Wh
2 eV 0.00000000000000000000008901 Wh
3 eV 0.00000000000000000000013351 Wh
4 eV 0.00000000000000000000017802 Wh
5 eV 0.00000000000000000000022252 Wh
6 eV 0.00000000000000000000026703 Wh
7 eV 0.00000000000000000000031153 Wh
8 eV 0.00000000000000000000035604 Wh
9 eV 0.00000000000000000000040054 Wh
10 eV 0.00000000000000000000044505 Wh
100 eV 0.0000000000000000000044505 Wh
1,000 eV 0.000000000000000000044505 Wh
10,000 eV 0.00000000000000000044505 Wh
100,000 eV 0.0000000000000000044505 Wh
1,000,000 eV 0.000000000000000044505 Wh
10,000,000 eV 0.00000000000000044505 Wh
100,000,000 eV 0.0000000000000044505 Wh
1,000,000,000 eV 0.000000000000044505 Wh
10,000,000,000 eV 0.00000000000044505 Wh
100,000,000,000 eV 0.0000000000044505 Wh
1,000,000,000,000 eV 0.000000000044505 Wh
10,000,000,000,000 eV 0.00000000044505 Wh
100,000,000,000,000 eV 0.0000000044505 Wh
1,000,000,000,000,000 eV 0.000000044505 Wh
10,000,000,000,000,000 eV 0.00000044505 Wh
100,000,000,000,000,000 eV 0.0000044505 Wh
1,000,000,000,000,000,000 eV 0.000044505 Wh
10,000,000,000,000,000,000 eV 0.000445 Wh
100,000,000,000,000,000,000 eV 0.00445 Wh
1,000,000,000,000,000,000,000 eV 0.044505 Wh
10,000,000,000,000,000,000,000 eV 0.445049 Wh
99,999,999,999,999,991,611,392 eV 4.4505 Wh


  1. Tatum, J., Electricity and Magnetism - 2.3: Electron-volts, https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electricity_and_Magnetism_(Tatum)/02%3A_Electrostatic_Potential/2.03%3A_Electron-volts
  2. Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf

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