Calorie Converter - Convert Calories to Joules, BTU, kWh
Result:
1 cal = 4.184 J
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How Calorie Conversion Works
Input Value
Enter calorie value
Select Units
Choose from and to units
Convert
Apply conversion formula
Calorie Conversion Table
| cal | J | BTU | kWh |
|---|---|---|---|
| 0.1 | 0.02 | 25.22 | 86042.07 |
| 0.5 | 0.12 | 126.08 | 430210.33 |
| 1 | 0.24 | 252.17 | 860420.65 |
| 2 | 0.48 | 504.33 | 1720841.30 |
| 5 | 1.20 | 1260.83 | 4302103.25 |
| 10 | 2.39 | 2521.65 | 8604206.50 |
| 15 | 3.59 | 3782.48 | 12906309.75 |
| 20 | 4.78 | 5043.31 | 17208413.00 |
| 25 | 5.98 | 6304.13 | 21510516.25 |
| 30 | 7.17 | 7564.96 | 25812619.50 |
| 40 | 9.56 | 10086.62 | 34416826.00 |
| 50 | 11.95 | 12608.27 | 43021032.50 |
| 75 | 17.93 | 18912.40 | 64531548.76 |
| 100 | 23.90 | 25216.54 | 86042065.01 |
| 150 | 35.85 | 37824.81 | 129063097.51 |
Calorie Units Progression Chart
1 cal
5 cal
10 cal
25 cal
50 cal
100 cal
Practice Problems
Problem 1:
Convert 15 cal to J
Solution: 15 Ć 0.2390 = 3.59 J
Problem 2:
Convert 25 J to cal
Solution: 25 Ć 4.1840 = 104.60 cal
Problem 3:
Convert 0.5 cal to J
Solution: 0.5 Ć 0.2390 = 0.12 J
Problem 4:
Convert 100 J to cal
Solution: 100 Ć 4.1840 = 418.40 cal
Problem 5:
Convert 7.5 cal to J
Solution: 7.5 Ć 0.2390 = 1.79 J
What is a Calorie?
A calorie is a unit of energy. It measures how much energy food gives your body. When you eat food, your body uses calories for energy. This energy helps you walk, think, and do daily activities.
Scientists also use calories to measure energy in other things. They can convert calories to joules, BTU, or kilowatt-hours. Our calorie converter helps you change calories into these different energy units easily.
There are two types of calories. Small calories (cal) and large calories (Cal or kcal). One large calorie equals 1000 small calories. Food labels usually show large calories.
How to Use Our Calorie Converter
Using our calorie converter is very simple. Just follow these easy steps to convert calories to joules, BTU, or kilowatt-hours:
Type the number of calories you want to convert in the input box.
Choose the unit you are converting from (calories, joules, BTU, or kWh).
Pick the unit you want to convert to from the dropdown menu.
See your answer right away! The converter shows the result instantly.
Common Calorie Conversions
Here are some common ways people convert calories to other energy units:
Calories to Joules
This is very common in science class. To convert calories to joules:
1 calorie = 4.184 joules
Example: 10 calories = 41.84 joules
Calories to BTU
BTU means British Thermal Unit. It measures heat energy:
1 calorie = 0.003968 BTU
Example: 100 calories = 0.3968 BTU
Calories to kWh
Kilowatt-hours measure electrical energy:
1 calorie = 0.000001163 kWh
Example: 1000 calories = 0.001163 kWh
Food Calories
Food labels show large calories (kcal):
1 food calorie = 1000 small calories
Example: 1 kcal = 4184 joules
Why Do People Convert Calories?
People convert calories to other energy units for many reasons. Here are the most common ones:
School Work
Students need to convert calories to joules for science and physics classes. Teachers often ask for answers in different units.
Science Jobs
Scientists and engineers use different energy units. They might need calories in joules or BTU for their work.
Health Studies
Doctors and health workers sometimes need to convert food calories to other energy units for research.
Energy Planning
People who work with energy systems need to compare different types of energy measurements.
International Work
Different countries use different energy units. Converting helps people work together across borders.
Learning
Understanding how energy units relate helps people learn about physics and chemistry better.
Tips for Converting Calories
Here are some helpful tips to make calorie conversion easier:
Remember the Difference
Small calories (cal) and large calories (Cal or kcal) are different. Food calories are usually large calories.
Use Our Calculator
Our calorie converter does all the math for you. No need to remember complex formulas or do calculations by hand.
Check Your Work
If you get a very big or very small number, double-check that you picked the right units.
Round When Needed
For most uses, you don't need many decimal places. Round your answer to make it easier to use.
Frequently Asked Questions
How many joules are in one calorie?
One calorie equals 4.184 joules. This is the exact conversion that scientists use around the world.
What is the difference between cal and Cal?
Small cal is a small calorie. Big Cal (or kcal) is a large calorie that equals 1000 small calories. Food labels use large calories.
Can I convert calories to kilowatt-hours?
Yes! One calorie equals 0.000001163 kilowatt-hours. Our converter can do this calculation for you instantly.
Why do I need to convert calories to BTU?
BTU (British Thermal Unit) is used in heating and cooling systems. Converting calories to BTU helps compare different types of energy.
Is this calorie converter accurate?
Yes! Our converter uses the exact conversion factors that scientists use. It gives you precise results every time.
Can I use this converter for food calories?
Yes, but remember that food calories are large calories (kcal). Make sure to select the right unit when converting.