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Megajoules to Kiloelectronvolts Converter

Convert megajoules (MJ) 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 × 10²¹ keV
joules (watt-seconds)
1,000,000 J
kilojoules
1,000 kJ
gigajoules
0.001 GJ
calories (thermochemical)
239,005.736138 cal
kilocalories (food Calories)
239.005736138 kcal
megacalories
0.239005736138 Mcal
watt-hours
277.777777778 Wh
kilowatt-hours
0.277777777778 kWh
megawatt-hours
0.000277777777778 MWh
British thermal units (IT)
947.817120313 Btu
million Btu
0.000947817120313 MMBtu
therms (100,000 Btu)
0.00947817120313 thm
quads (10¹⁵ Btu)
9.47817120313 × 10⁻¹³ quad
electronvolts
6.24150907446 × 10²⁴ eV
megaelectronvolts
6.24150907446 × 10¹⁸ MeV

1 MJ = 6.24150907446 × 10²¹ keV

Show the working
  1. 1 MJ = 6.24150907446e21 keV
  2. 1 × 6.24150907446e21 = 6.24150907446e21 keV

How to convert megajoules to kiloelectronvolts

1 MJ = 6.24150907446 × 10²¹ keV, so multiply by 6.24150907446 to go from megajoules to kiloelectronvolts. Going the other way, 1 keV = 1.602176634 × 10⁻²² MJ.

keV = MJ × 6.24150907446
MJ = keV × 1.602176634

Worked example:

1 MJ = 6.24150907446e21 keV
5 × 6.24150907446e21 = 3.12075453723e22 keV

Megajoules to kiloelectronvolts table

MegajoulesKiloelectronvolts
1 MJ6.24150907446 × 10²¹ keV
2 MJ1.24830181489 × 10²² keV
3 MJ1.87245272234 × 10²² keV
4 MJ2.49660362978 × 10²² keV
5 MJ3.12075453723 × 10²² keV
6 MJ3.74490544468 × 10²² keV
7 MJ4.36905635212 × 10²² keV
8 MJ4.99320725957 × 10²² keV
9 MJ5.61735816701 × 10²² keV
10 MJ6.24150907446 × 10²² keV
15 MJ9.36226361169 × 10²² keV
20 MJ1.24830181489 × 10²³ keV
25 MJ1.56037726862 × 10²³ keV
30 MJ1.87245272234 × 10²³ keV
40 MJ2.49660362978 × 10²³ keV
50 MJ3.12075453723 × 10²³ keV
75 MJ4.68113180585 × 10²³ keV
100 MJ6.24150907446 × 10²³ keV
250 MJ1.56037726862 × 10²⁴ keV
500 MJ3.12075453723 × 10²⁴ keV
1000 MJ6.24150907446 × 10²⁴ keV

About the units

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

Formula version 0.1.0Reviewed