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Joules to Kiloelectronvolts Converter

Convert joules (watt-seconds) (J) to kiloelectronvolts (keV), 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
6.24150907446 × 10¹⁵ keV
kilojoules
0.001 kJ
megajoules
1 × 10⁻⁶ MJ
gigajoules
1 × 10⁻⁹ GJ
calories (thermochemical)
0.239005736138 cal
kilocalories (food Calories)
0.000239005736138 kcal
megacalories
2.39005736138 × 10⁻⁷ Mcal
watt-hours
0.000277777777778 Wh
kilowatt-hours
2.77777777778 × 10⁻⁷ kWh
megawatt-hours
2.77777777778 × 10⁻¹⁰ MWh
British thermal units (IT)
0.000947817120313 Btu
million Btu
9.47817120313 × 10⁻¹⁰ MMBtu
therms (100,000 Btu)
9.47817120313 × 10⁻⁹ thm
quads (10¹⁵ Btu)
9.47817120313 × 10⁻¹⁹ quad
electronvolts
6.24150907446 × 10¹⁸ eV
megaelectronvolts
6,241,509,074,460 MeV

1 J = 6.24150907446 × 10¹⁵ keV

Show the working
  1. 1 J = 6.24150907446e15 keV
  2. 1 × 6.24150907446e15 = 6.24150907446e15 keV

How to convert joules to kiloelectronvolts

1 J = 6.24150907446 × 10¹⁵ keV, so multiply by 6.24150907446 to go from joules (watt-seconds) to kiloelectronvolts. Going the other way, 1 keV = 1.602176634 × 10⁻¹⁶ J.

keV = J × 6.24150907446
J = keV × 1.602176634

Worked example:

1 J = 6.24150907446e15 keV
5 × 6.24150907446e15 = 3.12075453723e16 keV

Joules to kiloelectronvolts table

JoulesKiloelectronvolts
1 J6.24150907446 × 10¹⁵ keV
2 J1.24830181489 × 10¹⁶ keV
3 J1.87245272234 × 10¹⁶ keV
4 J2.49660362978 × 10¹⁶ keV
5 J3.12075453723 × 10¹⁶ keV
6 J3.74490544468 × 10¹⁶ keV
7 J4.36905635212 × 10¹⁶ keV
8 J4.99320725957 × 10¹⁶ keV
9 J5.61735816701 × 10¹⁶ keV
10 J6.24150907446 × 10¹⁶ keV
15 J9.36226361169 × 10¹⁶ keV
20 J1.24830181489 × 10¹⁷ keV
25 J1.56037726862 × 10¹⁷ keV
30 J1.87245272234 × 10¹⁷ keV
40 J2.49660362978 × 10¹⁷ keV
50 J3.12075453723 × 10¹⁷ keV
75 J4.68113180585 × 10¹⁷ keV
100 J6.24150907446 × 10¹⁷ keV
250 J1.56037726862 × 10¹⁸ keV
500 J3.12075453723 × 10¹⁸ keV
1000 J6.24150907446 × 10¹⁸ keV

About the units

Joules (J)
Joules (watt-seconds), a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).
Kiloelectronvolts (keV)
Kiloelectronvolts, a specialised unit. Definition: NIST CODATA: elementary charge (exact since the 2019 SI redefinition).

Formula version 0.1.0Reviewed