Calorie to Kilojoule
1 cal = 0.004184 kJ
Convert Calorie (cal) to Kilojoule (kJ) with engineering-grade precision. Instant results, formula, and reference table below.
1 Calorie ≈0.004184 Kilojoule
How to convert Calorie to Kilojoule (cal to kJ)
Converting Calories to Kilojoules is critical for developers working with international data standards or scientific applications. This tool performs the calculation entirely on your client (browser) using JavaScript/WASM, ensuring zero latency and maximum privacy.
The Formula
1 cal = 0.00418400 kJ
Calculation Example
Let's say you want to convert 5 cal to kJ:
- Input: 5 cal
- Calculation: 5 × 0.00418400
- Result: 0.0209 kJ
About the Calorie to Kilojoule conversion
The conversion factor from Calorie (cal) to Kilojoule (kJ) is 0.004184, meaning 1 cal = 0.004184 kJ and inversely 1 kJ = 239.01 cal. That makes the Kilojoule the larger of the two units in the energy category, where the SI base unit is the joule. Every ratio here is derived from the SI/international definition rather than a rounded approximation, so results are stable across repeated conversions.
Need the reverse? Use the Kilojoule to Calorie converter.
Frequently Asked Questions
How do I convert Calorie to Kilojoule?
To convert Calorie to Kilojoule, you need to multiply the cal value by 0.00418400.
What is the formula for cal to kJ?
The simple formula is: kJ = cal × 0.00418400.
Which is bigger: Calorie or Kilojoule?
A Kilojoule is bigger. One Kilojoule is equal to approx 239.0057 Calories.
How many Calories are in one Kilojoule?
There are approximately 239.006 Calories in one Kilojoule.
Quick Conversion Table
| cal | kJ |
|---|---|
| 1 | 0.0042 |
| 5 | 0.0209 |
| 10 | 0.0418 |
| 20 | 0.0837 |
| 50 | 0.2092 |
| 100 | 0.4184 |