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Kiloelectronvolts to Electronvolts Converter

Convert kiloelectronvolts (keV) to electronvolts (eV), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
1,000 eV
joules (watt-seconds)
1.602176634 × 10⁻¹⁶ J
kilojoules
1.602176634 × 10⁻¹⁹ kJ
megajoules
1.602176634 × 10⁻²² MJ
gigajoules
1.602176634 × 10⁻²⁵ GJ
calories (thermochemical)
3.82929405832 × 10⁻¹⁷ cal
kilocalories (food Calories)
3.82929405832 × 10⁻²⁰ kcal
megacalories
3.82929405832 × 10⁻²³ Mcal
watt-hours
4.45049065 × 10⁻²⁰ Wh
kilowatt-hours
4.45049065 × 10⁻²³ kWh
megawatt-hours
4.45049065 × 10⁻²⁶ MWh
British thermal units (IT)
1.51857044347 × 10⁻¹⁹ Btu
million Btu
1.51857044347 × 10⁻²⁵ MMBtu
therms (100,000 Btu)
1.51857044347 × 10⁻²⁴ thm
quads (10¹⁵ Btu)
1.51857044347 × 10⁻³⁴ quad
megaelectronvolts
0.001 MeV

1 keV = 1,000 eV

Show the working
  1. 1 keV = 1000 eV
  2. 1 × 1000 = 1000 eV

How to convert kiloelectronvolts to electronvolts

1 keV = 1,000 eV, so multiply by 1,000 to go from kiloelectronvolts to electronvolts. Going the other way, 1 eV = 0.001 keV.

eV = keV × 1,000
keV = eV × 0.001

Worked example:

1 keV = 1000 eV
5 × 1000 = 5000 eV

Kiloelectronvolts to electronvolts table

KiloelectronvoltsElectronvolts
1 keV1,000 eV
2 keV2,000 eV
3 keV3,000 eV
4 keV4,000 eV
5 keV5,000 eV
6 keV6,000 eV
7 keV7,000 eV
8 keV8,000 eV
9 keV9,000 eV
10 keV10,000 eV
15 keV15,000 eV
20 keV20,000 eV
25 keV25,000 eV
30 keV30,000 eV
40 keV40,000 eV
50 keV50,000 eV
75 keV75,000 eV
100 keV100,000 eV
250 keV250,000 eV
500 keV500,000 eV
1000 keV1,000,000 eV

About the units

Kiloelectronvolts (keV)
Kiloelectronvolts, a specialised unit. Definition: NIST CODATA: elementary charge (exact since the 2019 SI redefinition).
Electronvolts (eV)
Electronvolts, a specialised unit. Definition: NIST CODATA: elementary charge (exact since the 2019 SI redefinition).

Formula version 0.1.0Reviewed