Calories to Joules Converter (cal to J)
Calories to Joules Converter (cal to J)
Convert calories (cal) to Joules (J) accurately for chemistry reactions, thermodynamic heat equations, and mechanical energy equivalents. One thermochemical calorie equals exactly 4.184 Joules.
How to use this converter
- Enter the value in Calories (cal) you want to convert.
- Ensure the “From” selector is set to Calories (cal).
- Ensure the “To” selector is set to Joules (J).
- The converted value in Joules (J) updates instantly in the result box.
Calories to Joules Formula
To convert from calories to joules, use the authoritative physical relationship:
Formula:
J = cal × 4.184
Calculation Examples
- Example 1: 1 cal = 4.184 J
- Example 2: 5 cal = 20.92 J
- Example 3: 10 cal = 41.84 J
- Example 4: 50 cal = 209.2 J
Calories to Joules Conversion Table
| Calories (cal) | Joules (J) |
|---|---|
| 1 cal | 4.1840 J |
| 2 cal | 8.3680 J |
| 5 cal | 20.9200 J |
| 10 cal | 41.8400 J |
| 20 cal | 83.6800 J |
| 50 cal | 209.20 J |
| 100 cal | 418.40 J |
Frequently Asked Questions
How do I convert Calories to Joules?
Input your number in calories into the calculator above, and your equivalent in joules is displayed immediately according to the standard physical conversion formula.
What is the difference between small calories (cal) and food Calories (kcal)?
One food Calorie (often capitalized as Calorie or written as kcal) equals exactly 1,000 small thermal calories (cal), or 4.184 kilojoules (kJ). In everyday nutritional conversations and food nutrition facts tables, “calories” almost always refers to kilocalories (kcal).
Is this calculation accurate for engineering and scientific applications?
Yes. ConverterHub uses exact thermochemical and SI standard conversion constants (including 1 cal = 4.184 J and 1 kWh = 3,600,000 J) to ensure full precision across academic, domestic, and laboratory calculations.