Convert Kilocalories (kcal) to Kiloelectronvolts (keV)
Enter a value below to convert Kilocalories (kcal) to Kiloelectronvolts (keV).
Conversion:
1 Kilocalories (kcal) = 26114473968000000000 Kiloelectronvolts (keV)
How to Convert Kilocalories (kcal) to Kiloelectronvolts (keV)
1 kcal = 26114473968000000000 kev
1 kev = 3.8292940583e-20 kcal
Example: convert 15 Kilocalories (kcal) to Kiloelectronvolts (keV):
25 kcal = 652861849190000000000 kev
Kilocalories (kcal) to Kiloelectronvolts (keV) Conversion Table
| Kilocalories (kcal) | Kiloelectronvolts (keV) |
|---|---|
| 0.01 kcal | 261144739680000000 kev |
| 0.1 kcal | 2611447396800000000 kev |
| 1 kcal | 26114473968000000000 kev |
| 2 kcal | 52228947934999994000 kev |
| 3 kcal | 78343421903000000000 kev |
| 5 kcal | 130572369839999990000 kev |
| 10 kcal | 261144739679999980000 kev |
| 20 kcal | 522289479349999960000 kev |
| 50 kcal | 1.3057236984e+21 kev |
| 100 kcal | 2.6114473968e+21 kev |
| 1000 kcal | 2.6114473968e+22 kev |
Kilocalories (kcal)
Definition
A kilocalorie (kcal), also known as a food calorie or large calorie, equals 1,000 small calories or approximately 4,184 joules. It is the standard unit for measuring dietary energy.
History
The kilocalorie became the standard unit for food energy labeling in the United States and many other countries during the 20th century. Nutritionist Wilbur Olin Atwater pioneered its use in dietary science.
Current use
Kilocalories are the primary unit for food energy on nutrition labels in the US, Canada, and much of Asia. They are also used in exercise science, dietetics, and metabolic rate calculations.
Kiloelectronvolts (keV)
Definition
A kiloelectronvolt (keV) is a unit of energy equal to 1,000 electronvolts, or approximately 1.602 × 10⁻¹⁶ joules.
History
The keV became widely used in the mid-20th century with advances in X-ray physics, nuclear medicine, and particle accelerator research requiring intermediate energy scale measurements.
Current use
Kiloelectronvolts are used to characterize X-ray photon energies, nuclear decay energies, electron beam energies, and in medical imaging (CT, PET) to describe radiation energy levels.