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Kiloelectronvolts to Calories Converter

Convert kiloelectronvolts (keV) to calories (thermochemical) (cal), 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
3.82929405832 × 10⁻¹⁷ cal
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
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
electronvolts
1,000 eV
megaelectronvolts
0.001 MeV

1 keV = 3.82929405832 × 10⁻¹⁷ cal

Show the working
  1. 1 keV = 3.82929405832e-17 cal
  2. 1 × 3.82929405832e-17 = 3.82929405832e-17 cal

How to convert kiloelectronvolts to calories

1 keV = 3.82929405832 × 10⁻¹⁷ cal, so multiply by 3.82929405832 to go from kiloelectronvolts to calories (thermochemical). Going the other way, 1 cal = 2.61144739675 × 10¹⁶ keV.

cal = keV × 3.82929405832
keV = cal × 2.61144739675

Worked example:

1 keV = 3.82929405832e-17 cal
5 × 3.82929405832e-17 = 1.91464702916e-16 cal

Kiloelectronvolts to calories table

KiloelectronvoltsCalories
1 keV3.82929405832 × 10⁻¹⁷ cal
2 keV7.65858811663 × 10⁻¹⁷ cal
3 keV1.1487882175 × 10⁻¹⁶ cal
4 keV1.53171762333 × 10⁻¹⁶ cal
5 keV1.91464702916 × 10⁻¹⁶ cal
6 keV2.29757643499 × 10⁻¹⁶ cal
7 keV2.68050584082 × 10⁻¹⁶ cal
8 keV3.06343524665 × 10⁻¹⁶ cal
9 keV3.44636465249 × 10⁻¹⁶ cal
10 keV3.82929405832 × 10⁻¹⁶ cal
15 keV5.74394108748 × 10⁻¹⁶ cal
20 keV7.65858811663 × 10⁻¹⁶ cal
25 keV9.57323514579 × 10⁻¹⁶ cal
30 keV1.1487882175 × 10⁻¹⁵ cal
40 keV1.53171762333 × 10⁻¹⁵ cal
50 keV1.91464702916 × 10⁻¹⁵ cal
75 keV2.87197054374 × 10⁻¹⁵ cal
100 keV3.82929405832 × 10⁻¹⁵ cal
250 keV9.57323514579 × 10⁻¹⁵ cal
500 keV1.91464702916 × 10⁻¹⁴ cal
1000 keV3.82929405832 × 10⁻¹⁴ cal

About the units

Kiloelectronvolts (keV)
Kiloelectronvolts, a specialised unit. Definition: NIST CODATA: elementary charge (exact since the 2019 SI redefinition).
Calories (cal)
Calories (thermochemical), a specialised unit. The thermochemical calorie, 4.184 J, used on US food labels as 1 Calorie = 1 kilocalorie. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.

Formula version 0.1.0Reviewed