Kiloelectronvolts to Watt-hours Conversion

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

Results in Watt-hours:
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1 keV = 4.4505E-20 Wh
Hint: use a scientific notation calculator to convert E notation to decimal

How to Convert Kiloelectronvolts to Watt-hours

To convert a kiloelectronvolt measurement to a watt-hour measurement, multiply the energy by the conversion ratio.

Since one kiloelectronvolt is equal to 4.4505E-20 watt-hours, you can use this simple formula to convert:

watt-hours = kiloelectronvolts × 4.4505E-20

The energy in watt-hours is equal to the kiloelectronvolts multiplied by 4.4505E-20.

For example, here's how to convert 5.0E+19 kiloelectronvolts to watt-hours using the formula above.
5.0E+19 keV = (5.0E+19 × 4.4505E-20) = 2.225245 Wh

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


Kiloelectronvolts can be abbreviated as keV; for example, 1 kiloelectronvolt can be written as 1 keV.


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.[1]

Kiloelectronvolt to Watt-hour Conversion Table

Kiloelectronvolt measurements converted to watt-hours
Kiloelectronvolts Watt-hours
1 keV 0.000000000000000000044505 Wh
2 keV 0.00000000000000000008901 Wh
3 keV 0.00000000000000000013351 Wh
4 keV 0.00000000000000000017802 Wh
5 keV 0.00000000000000000022252 Wh
6 keV 0.00000000000000000026703 Wh
7 keV 0.00000000000000000031153 Wh
8 keV 0.00000000000000000035604 Wh
9 keV 0.00000000000000000040054 Wh
10 keV 0.00000000000000000044505 Wh
100 keV 0.0000000000000000044505 Wh
1,000 keV 0.000000000000000044505 Wh
10,000 keV 0.00000000000000044505 Wh
100,000 keV 0.0000000000000044505 Wh
1,000,000 keV 0.000000000000044505 Wh
10,000,000 keV 0.00000000000044505 Wh
100,000,000 keV 0.0000000000044505 Wh
1,000,000,000 keV 0.000000000044505 Wh
10,000,000,000 keV 0.00000000044505 Wh
100,000,000,000 keV 0.0000000044505 Wh
1,000,000,000,000 keV 0.000000044505 Wh
10,000,000,000,000 keV 0.00000044505 Wh
100,000,000,000,000 keV 0.0000044505 Wh
1,000,000,000,000,000 keV 0.000044505 Wh
10,000,000,000,000,000 keV 0.000445 Wh
100,000,000,000,000,000 keV 0.00445 Wh
1,000,000,000,000,000,000 keV 0.044505 Wh
10,000,000,000,000,000,000 keV 0.445049 Wh
100,000,000,000,000,000,000 keV 4.4505 Wh


  1. Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019,

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