Kilojoules to Calories Converter
Convert kilojoules to kilocalories (food Calories) instantly. Type a value, change either unit, or press swap to go the other way. 1 kilojoule = 0.23900574 kilocalories (food Calories).
1 kilojoule = 0.23900574 kilocalories (food Calories)
How to convert kilojoules to kilocalories (food Calories)
kilocalories (food Calories) = kilojoules × 0.2390057361
To convert kilojoules to kilocalories (food Calories), multiply the value by 0.2390057361. To go back from kilocalories (food Calories) to kilojoules, divide by the same number (or multiply by 4.184).
Worked examples
- 500 kJ: 500 × 0.2390057361 = 119.50287 kcal
- 1,000 kJ: 1,000 × 0.2390057361 = 239.00574 kcal
- 2,000 kJ: 2,000 × 0.2390057361 = 478.01147 kcal
Divide kilojoules by 4.2 (or multiply by 0.24). 1,000 kJ is about 239 Calories.
Kilojoules to Calories conversion table
Kilojoules to Kilocalories
| kJ | kcal |
|---|---|
| 100 | 23.900574 |
| 250 | 59.751434 |
| 500 | 119.50287 |
| 1,000 | 239.00574 |
| 2,000 | 478.01147 |
| 4,184 | 1,000 |
| 6,000 | 1,434.0344 |
| 8,368 | 2,000 |
| 10,000 | 2,390.0574 |
| 12,000 | 2,868.0688 |
Kilocalories to Kilojoules
| kcal | kJ |
|---|---|
| 100 | 418.4 |
| 250 | 1,046 |
| 500 | 2,092 |
| 1,000 | 4,184 |
| 2,000 | 8,368 |
| 4,184 | 17,505.856 |
| 6,000 | 25,104 |
| 8,368 | 35,011.712 |
| 10,000 | 41,840 |
| 12,000 | 50,208 |
Energy equivalents
See how one kilojoule and one kilocalorie (food Calorie) compare with every other energy unit on the site.
1 kilojoule equals
| Unit | Value |
|---|---|
| joules (J) | 1,000 |
| calories (small) (cal) | 239.0057 |
| kilocalories (food Calories) (kcal) | 0.2390057 |
| watt-hours (Wh) | 0.2777778 |
| kilowatt-hours (kWh) | 0.0002777778 |
| British thermal units (BTU) | 0.9478171 |
1 kilocalorie (food Calorie) equals
| Unit | Value |
|---|---|
| joules (J) | 4,184 |
| kilojoules (kJ) | 4.184 |
| calories (small) (cal) | 1,000 |
| watt-hours (Wh) | 1.162222 |
| kilowatt-hours (kWh) | 0.001162222 |
| British thermal units (BTU) | 3.965667 |
When you need to convert kilojoules to kilocalories (food Calories)
Food labels in Australia, New Zealand and parts of Europe print kilojoules, while US labels and most diet apps use Calories. Converting lets you compare snacks across countries and track your daily intake in the unit your plan uses.
About the units
Kilojoule (kJ)
A kilojoule is 1,000 joules. It is used for food energy on labels in Australia, New Zealand and Europe, usually alongside kilocalories.
Kilocalorie (food Calorie) (kcal)
A kilocalorie is 1,000 small calories, or 4,184 joules. The "Calories" on food labels are actually kilocalories.
Frequently asked questions
How do I convert kilojoules to kilocalories (food Calories)?
Multiply the number of kilojoules by 0.2390057361. For example, 10 kilojoules × 0.2390057361 = 2.390057361 kilocalories (food Calories).
How many kilocalories (food Calories) are in one kilojoule?
There are 0.2390057361 kilocalories (food Calories) in one kilojoule.
How many kilojoules are in one kilocalorie (food Calorie)?
There are 4.184 kilojoules in one kilocalorie (food Calorie).
How many kilojoules should an average adult eat per day?
Dietary guidelines often use about 8,700 kJ per day for an average adult, which is about 2,080 Calories. Your own needs depend on age, size and activity.
Can I convert other energy units with this tool?
Yes. Use the From and To drop-downs in the converter to choose any energy unit, or press the swap button to reverse the conversion. All calculations use internationally defined conversion factors.