Kilocalorie to Kilojoule
1 kcal = 4.184 kJ
Convert Kilocalorie (kcal) to Kilojoule (kJ) with engineering-grade precision. Instant results, formula, and reference table below.
1 Kilocalorie ≈4.184 Kilojoule
How to convert Kilocalorie to Kilojoule (kcal to kJ)
Converting Kilocalories 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 kcal = 4.18400 kJ
Calculation Example
Let's say you want to convert 5 kcal to kJ:
- Input: 5 kcal
- Calculation: 5 × 4.18400
- Result: 20.9200 kJ
About the Kilocalorie to Kilojoule conversion
The conversion factor from Kilocalorie (kcal) to Kilojoule (kJ) is 4.184, meaning 1 kcal = 4.184 kJ and inversely 1 kJ = 0.23901 kcal. That makes the Kilocalorie 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 Kilocalorie converter.
Frequently Asked Questions
How do I convert Kilocalorie to Kilojoule?
To convert Kilocalorie to Kilojoule, you need to multiply the kcal value by 4.18400.
What is the formula for kcal to kJ?
The simple formula is: kJ = kcal × 4.18400.
Which is bigger: Kilocalorie or Kilojoule?
A Kilocalorie is bigger. One Kilocalorie is equal to approx 4.1840 Kilojoules.
How many Kilocalories are in one Kilojoule?
There are approximately 0.239006 Kilocalories in one Kilojoule.
Quick Conversion Table
| kcal | kJ |
|---|---|
| 1 | 4.1840 |
| 5 | 20.9200 |
| 10 | 41.8400 |
| 20 | 83.6800 |
| 50 | 209.2000 |
| 100 | 418.4000 |