Convert kJ to Calories
Instantly convert Kilojoules into Calories
Energy Calculator
Precise Factor: 1 kcal = 4.184 kJ
Why use a Kj to Cal Converter?
If you are tracking your diet, reading food labels can be confusing. Some countries (like Australia and the UK) use Kilojoules (kJ), while others (like the USA) use Calories (kcal).
Our free Kj to Calories Converter bridges this gap instantly. Whether you are aiming for a specific “Kj to Cal” goal for weight loss or simply trying to understand a nutrition label, this tool provides the accurate math you need without the headache.
Common Conversions (kJ to Cal)
A quick reference chart for common energy values found on food packaging.
| Kilojoules (kJ) | Calories (kcal) |
|---|---|
| 100 kJ | 24 kcal |
| 500 kJ | 120 kcal |
| 1,000 kJ | 239 kcal |
| 2,000 kJ | 478 kcal |
| 8,700 kJ (Daily Avg) | 2,080 kcal |
| 10,000 kJ | 2,390 kcal |
How to Convert Kilojoules into Calories
The math behind the conversion is simple physics. A “Calorie” (specifically a dietary kilocalorie) is just a different unit of energy measurement than a Joule.
The Golden Formula:
Calories = Kilojoules รท 4.184
Example: If a burger contains 2500 kJ:
- 2500 / 4.184 = 597.5 Calories.
What does “8700 kJ” mean?
You may often see the phrase “Percentage daily intakes are based on an average adult diet of 8700 kJ” on food labels.
8700 kJ is approximately 2000 Calories. This is the standard figure used by health authorities as a rough guide for the average adult’s daily energy maintenance requirement.
Frequently Asked Questions
Is 1 kJ the same as 1 Calorie?
No. 1 Calorie is roughly 4 times larger than 1 Kilojoule.
Can I use this for weight loss?
Yes. Whether you count kJ or Calories, consuming less energy than you burn leads to weight loss.