CAL to KJ Calculator
Convert calories (kcal) to kilojoules (kJ) using the standard 4.184 conversion. Useful for comparing app calories to Australian food labels.
Calories to Kilojoules (CAL to KJ)
Enter calories (kcal) to get kilojoules (kJ) instantly. Uses the standard conversion: 1 kcal = 4.184 kJ.
Quick presets:
Kilojoules (kJ)
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General information only — not medical advice.
Common calories (kcal) to kJ examples
Quick answers for common searches like 100 cal to kJ, 200 cal to kJ, 300 cal to kJ, 500 cal to kJ, and more.
Values shown using kJ = kcal × 4.184, rounded to 1 decimal place.
Daily reference example: 2,080 kcal ≈ 8,702.7 kJ (equivalent to 8,700 kJ). See Daily kJ Intake for context.
Want more tools? Explore the Food Energy Toolkit or read answers in the FAQ.
Usage & Reference
- Converting “Calories” from apps into kJ to compare with Australian food labels
- Checking the kJ equivalent of a recipe or nutrition article that lists kcal
- Keeping a consistent unit (kJ) across meals, packaging, and daily tracking
This CAL to KJ calculator uses the standard energy conversion: 1 kcal = 4.184 kJ. For reverse conversion, 1 kJ ≈ 0.239006 kcal.
Want the other direction? kJ to calories (kcal).
Frequently asked questions
How do I convert calories to kJ?
Multiply calories (kcal) by 4.184. Example: 300 kcal × 4.184 = 1,255.2 kJ.
Is kcal the same as Calories?
In nutrition, "Calories" usually means kilocalories (kcal). That’s why "cal to kJ" typically refers to kcal to kJ.
How many kJ are in 1 kcal?
1 kcal equals 4.184 kJ.
Can I convert kJ back to calories?
Yes. To convert kJ to calories (kcal), divide by 4.184. Use the kJ to calories calculator on the homepage.
Is this CAL to KJ calculator accurate?
Yes — it uses the standard conversion factor (1 kcal = 4.184 kJ). Results are shown rounded for readability.
Learn & Explore
Tip: Use the Toolkit to pick the right calculator for labels (per 100g vs per serve), meal totals, and daily reference values.