Wh to eV Converter

How to convert watt-hours to electronvolts

FormulaeV = Wh × 2.246943267×10²²

Multiply the value in watt-hours by 2.246943267×10²². To go the other way, multiply by 4.45049065×10⁻²³ (or divide by 2.246943267×10²²).

A watt-hour is larger than an electronvolt: one watt-hour contains 2.246943267×10²² electronvolts.

Worked examples

1 watt-hour1 Wh × 2.246943267×10²² = 2.246943267×10²² eV
5 watt-hours5 Wh × 2.246943267×10²² = 1.123471633×10²³ eV
10 watt-hours10 Wh × 2.246943267×10²² = 2.246943267×10²³ eV
20 watt-hours20 Wh × 2.246943267×10²² = 4.493886534×10²³ eV
100 watt-hours100 Wh × 2.246943267×10²² = 2.246943267×10²⁴ eV

Watt-hours to electronvolts conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Watt-hours to electronvolts: 0.1–10 Wh
Watt-hours (Wh)	Electronvolts (eV)
0.1 Wh	2.2469433×10²¹ eV
0.25 Wh	5.6173582×10²¹ eV
0.5 Wh	1.1234716×10²² eV
1 Wh	2.2469433×10²² eV
2 Wh	4.4938865×10²² eV
3 Wh	6.7408298×10²² eV
4 Wh	8.9877731×10²² eV
5 Wh	1.1234716×10²³ eV
6 Wh	1.348166×10²³ eV
7 Wh	1.5728603×10²³ eV
8 Wh	1.7975546×10²³ eV
9 Wh	2.0222489×10²³ eV
10 Wh	2.2469433×10²³ eV

Watt-hours to electronvolts: 12–1,000 Wh
Watt-hours (Wh)	Electronvolts (eV)
12 Wh	2.6963319×10²³ eV
15 Wh	3.3704149×10²³ eV
20 Wh	4.4938865×10²³ eV
25 Wh	5.6173582×10²³ eV
30 Wh	6.7408298×10²³ eV
40 Wh	8.9877731×10²³ eV
50 Wh	1.1234716×10²⁴ eV
75 Wh	1.6852075×10²⁴ eV
100 Wh	2.2469433×10²⁴ eV
250 Wh	5.6173582×10²⁴ eV
500 Wh	1.1234716×10²⁵ eV
1,000 Wh	2.2469433×10²⁵ eV

About the units

Watt-hour (Wh)

One watt sustained for an hour: 3,600 J. Battery capacities are rated in Wh.

Electronvolt (eV)

The energy an electron gains across one volt: exactly 1.602176634 × 10⁻¹⁹ J. One electronvolt equals 1.602176634×10⁻¹⁹ joules (J).

Frequently asked questions

How many electronvolts are in one watt-hour?

There are 2.246943267×10²² electronvolts in one watt-hour, and this value is exact by definition.

How do I convert watt-hours to electronvolts?

Multiply the number of watt-hours by 2.246943267×10²². For example, 10 Wh × 2.246943267×10²² = 2.246943267×10²³ eV.

How many watt-hours are in one electronvolt?

One electronvolt equals 4.45049065×10⁻²³ watt-hours. That is the reverse factor, 1 ÷ 2.246943267×10²².

What is 10 watt-hours in electronvolts?

10 Wh = 2.246943267×10²³ eV.

Is this Wh to eV converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.