Joule to Kilocalories Calculator
Convert energy from Joules (J) to Kilocalories (kcal)
How to Convert Joules to Kilocalories
To convert joules to kilocalories, you can use the following conversion factor: 1 kilocalorie (kcal) = 4184 joules (J)
Quick Trick: 4,184 joules = 1 kilocalorie!
Kilocalories (kcal) – Your Food’s Energy
A kilocalorie is a unit of energy commonly used to measure the energy content in food or the energy expended in physical activity. One kilocalorie equals 1,000 calories (cal), and it’s defined as the amount of energy needed to raise the temperature of 1 kilogram of water by 1°C. In everyday language, when people say “calories” (like on food labels), they usually mean kilocalories.
- That slice of pizza? About 300 kcal
- A 30-minute jog? Burns around 300 kcal
- Your favorite soda? Maybe 150 kcal
Joules (J) – The Science Energy Unit
The joule is the standard unit of energy in the International System of Units (SI). It measures the amount of energy transferred or work done. For example, lifting an apple one meter against gravity takes about 1 joule of energy. It’s widely used in physics and engineering.
- Lifting an apple 1 meter = 1 joule
- Doing one push-up = about 100 joules
- A lightning bolt = billions of joules!
Joule to Kilocalorie Conversion Table
| Joule (J) | Kilocalorie (kcal) |
|---|---|
| 100 J | 0.024 kcal |
| 500 J | 0.119 kcal |
| 1,000 J | 0.239 kcal |
| 2,500 J | 0.598 kcal |
| 5,000 J | 1.196 kcal |
| 10,000 J | 2.392 kcal |
