Kilojoules to Kilocalories Converter
Convert kilojoules to kilocalories instantly with this free kilojoules to kilocalories converter. Enter any value to get an accurate energy conversion, plus the formula, the conversion factor and a full reference table.
What is 1 kilojoule in kilocalories?
1 kilojoule is equal to 0.239005736 kilocalories.
1 ÷ 4.184 = 0.239005736 kilocalories
1 kilojoule = 0.2390057361 kilocalories
Kilojoules to Kilocalories formula
kcal = kJ ÷ 4.184
The kilojoules to kilocalories conversion factor is 0.239005736138, which is exact by definition. 1 kilojoule = 0.239005736138 kilocalories, and 1 kilocalorie = 4.184 kilojoules.
Worked examples
- 2 kilojoules = 0.478011472 kilocalories — 2 ÷ 4.184 = 0.478011472 kilocalories
- 6 kilojoules = 1.43403442 kilocalories — 6 ÷ 4.184 = 1.43403442 kilocalories
- 10 kilojoules = 2.39005736 kilocalories — 10 ÷ 4.184 = 2.39005736 kilocalories
Kilojoules to Kilocalories conversion table
Every value below is calculated with the exact conversion factor and rounded for display.
| Kilojoules (kJ) | Kilocalories (kcal) |
|---|---|
| 1 kJ | 0.23900574 kcal |
| 2 kJ | 0.47801147 kcal |
| 3 kJ | 0.71701721 kcal |
| 4 kJ | 0.95602294 kcal |
| 5 kJ | 1.1950287 kcal |
| 6 kJ | 1.4340344 kcal |
| 7 kJ | 1.6730402 kcal |
| 8 kJ | 1.9120459 kcal |
| 9 kJ | 2.1510516 kcal |
| 10 kJ | 2.3900574 kcal |
| 12 kJ | 2.8680688 kcal |
| 15 kJ | 3.585086 kcal |
| 20 kJ | 4.7801147 kcal |
| 25 kJ | 5.9751434 kcal |
| 30 kJ | 7.1701721 kcal |
| 50 kJ | 11.950287 kcal |
| 75 kJ | 17.92543 kcal |
| 100 kJ | 23.900574 kcal |
| 500 kJ | 119.50287 kcal |
| 1,000 kJ | 239.00574 kcal |
When you need to convert kilojoules to kilocalories
- Comparing food energy labelled in calories with labels in kilojoules.
- Reading utility bills and appliance ratings that mix kWh, joules and BTU.
Common mistakes to avoid
- Dividing when you should multiply. Because 1 kilojoule = 0.239006 kilocalories, the answer should be smaller than the number you started with.
- Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.
How precise does the answer need to be?
Round only at the end, and only to the precision your task actually needs. The converter above keeps full double precision internally and rounds for display.
How these units are defined
- Kilojoule (kJ): 1,000 joules; food energy labelling in Australia and New Zealand. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
- Kilocalorie (kcal): 1,000 small calories — the 'Calorie' on US nutrition labels. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
Related conversions
Frequently asked questions
- What is 1 kilojoule in kilocalories?
- 1 kilojoule is equal to 0.239005736 kilocalories.
- How many kilojoules are in one kilocalorie?
- There are 4.184 kilojoules in 1 kilocalorie.
- How do you convert kilojoules to kilocalories?
- Multiply the number of kilojoules by 0.239005736 — or use the formula kcal = kJ ÷ 4.184.
- What is 6 kilojoules in kilocalories?
- 6 kilojoules is 1.43403442 kilocalories. 6 ÷ 4.184 = 1.43403442 kilocalories.
- Is the kilojoules to kilocalories conversion exact?
- Yes. The relationship is fixed by definition, so 0.239005736138 is an exact conversion factor — only the displayed result is rounded.