Table of Contents
Joules
Joules are a way to measure energy. Just like how you use inches to measure length, or pounds to measure weight, you use joules to measure energy. When something has energy, it can do things like move, heat up, or light up. Joules help us understand how much energy is in something or how much energy is used when something happens.
Kilocalories
Kilocalories are also a way to measure energy, especially when it comes to food and our bodies. You might have heard them referred to as “calories” on food labels. When we eat food, our bodies use the energy stored in the food to keep us moving and functioning. So, kilocalories help us know how much energy we get from the food we eat.
How to convert from joules to kcal
Converting joules to kilocalories involves using a conversion factor. The relationship between these two units of energy is as follows:
1 kilocalorie (kcal) = 4184 joules (J)
To convert joules to kilocalories, you can use this formula:
Energy in kilocalories (kcal) = Energy in joules (J) / 4184
For example – Convert 5,000 joules to kilocalories using the formula above.
Ans. kilocalories = (5,000 J / 4,184) = 1.195029 kcal
Joules to kcal Conversion Table
| Joules | Kilocalories |
| 1 J | 0.000239 kcal |
| 2 J | 0.000478 kcal |
| 3 J | 0.000717 kcal |
| 4 J | 0.000956 kcal |
| 5 J | 0.001195 kcal |
| 6 J | 0.001434 kcal |
| 7 J | 0.001673 kcal |
| 8 J | 0.001912 kcal |
| 9 J | 0.002151 kcal |
| 10 J | 0.00239 kcal |
| 20 J | 0.00478 kcal |
| 30 J | 0.00717 kcal |
| 40 J | 0.00956 kcal |
| 50 J | 0.01195 kcal |
| 60 J | 0.01434 kcal |
| 70 J | 0.01673 kcal |
| 80 J | 0.01912 kcal |
| 90 J | 0.021511 kcal |
| 100 J | 0.023901 kcal |
| 200 J | 0.047801 kcal |
| 300 J | 0.071702 kcal |
| 400 J | 0.095602 kcal |
| 500 J | 0.119503 kcal |
| 600 J | 0.143403 kcal |
| 700 J | 0.167304 kcal |
| 800 J | 0.191205 kcal |
| 900 J | 0.215105 kcal |
| 1,000 J | 0.239006 kcal |
| 2,000 J | 0.478011 kcal |
| 3,000 J | 0.717017 kcal |
| 4,000 J | 0.956023 kcal |
| 5,000 J | 1.195 kcal |
| 6,000 J | 1.434 kcal |
| 7,000 J | 1.673 kcal |
| 8,000 J | 1.912 kcal |
| 9,000 J | 2.1511 kcal |
| 10,000 J | 2.3901 kcal |
FAQs on Joules to kcal
What is 1 kcal equal to in joule?
1 kilocalorie (kcal) is equal to about 4.18 joules.
Is 1 kcal equal to 1 kJ?
No, 1 kilocalorie (kcal) is not the same as 1 kilojoule (kJ). 1 kcal is about 4.18 kJ.
Is 1 kcal 4.184 J?
1 kilocalorie is actually about 4.18 joules. It's a bit less than 4.184 joules.
How do you convert J to kcal mol?
To convert joules (J) to kilocalories per mole (kcal/mol), you divide by a number called Avogadro's number
Is 1 joule equal to 1000 kJ?
No, it's the other way around. 1 kilojoule (kJ) is equal to 1000 joules (J).
What is the unit of 1 joule?
Joule is the unit used to measure energy. It's like the basic building block of energy measurement.
What is the formula of 1 joule?
There isn't a specific formula for 1 joule itself. A joule is a measure of energy, and energy can come from different sources and situations.
What is the SI unit of energy?
The SI unit of energy is the joule (J). This is the standard unit that scientists around the world use to talk about energy in all its forms.
