Kilojoules to kilocalories conversion table
Every row is computed with the exact factor the converter above uses:
1 kJ = 0.239006 kcal (kcal = kJ × 0.239006).
Looked-up values are rounded to 1 decimal;
type any amount into the tool for other kilojoules values.
| kJ | kcal |
|---|---|
| 1 kJ | 0.2 kcal |
| 2 kJ | 0.5 kcal |
| 5 kJ | 1.2 kcal |
| 10 kJ | 2.4 kcal |
| 20 kJ | 4.8 kcal |
| 25 kJ | 6 kcal |
| 50 kJ | 12 kcal |
| 75 kJ | 17.9 kcal |
| 100 kJ | 23.9 kcal |
| 150 kJ | 35.9 kcal |
| 200 kJ | 47.8 kcal |
| 250 kJ | 59.8 kcal |
| 300 kJ | 71.7 kcal |
| 350 kJ | 83.7 kcal |
| 400 kJ | 95.6 kcal |
| 450 kJ | 107.6 kcal |
| 500 kJ | 119.5 kcal |
| 550 kJ | 131.5 kcal |
| kJ | kcal |
|---|---|
| 600 kJ | 143.4 kcal |
| 650 kJ | 155.4 kcal |
| 700 kJ | 167.3 kcal |
| 750 kJ | 179.3 kcal |
| 800 kJ | 191.2 kcal |
| 850 kJ | 203.2 kcal |
| 900 kJ | 215.1 kcal |
| 950 kJ | 227.1 kcal |
| 1000 kJ | 239 kcal |
| 1100 kJ | 262.9 kcal |
| 1200 kJ | 286.8 kcal |
| 1300 kJ | 310.7 kcal |
| 1400 kJ | 334.6 kcal |
| 1500 kJ | 358.5 kcal |
| 1600 kJ | 382.4 kcal |
| 1700 kJ | 406.3 kcal |
| 1800 kJ | 430.2 kcal |
| 1900 kJ | 454.1 kcal |
| kJ | kcal |
|---|---|
| 2000 kJ | 478 kcal |
| 2100 kJ | 501.9 kcal |
| 2200 kJ | 525.8 kcal |
| 2300 kJ | 549.7 kcal |
| 2400 kJ | 573.6 kcal |
| 2500 kJ | 597.5 kcal |
| 2600 kJ | 621.4 kcal |
| 2700 kJ | 645.3 kcal |
| 2800 kJ | 669.2 kcal |
| 2900 kJ | 693.1 kcal |
| 3000 kJ | 717 kcal |
| 3500 kJ | 836.5 kcal |
| 4000 kJ | 956 kcal |
| 5000 kJ | 1,195 kcal |
| 8700 kJ | 2,079.3 kcal |
| 10000 kJ | 2,390.1 kcal |
Going the other way? Use the kilocalories to kilojoules converter.
You’re reading a food label from Europe or Australia and the energy is in kJ, but you count calories in kcal. The two describe the same thing, just on different scales. 1 kcal = 4.184 kJ, which flips to 1 kJ = 0.239006 kcal. This converter does the division the moment you type, so a 1500 kJ snack reads as about 358 kcal without any mental gymnastics.
The factor is fixed and the math is plain. Divide kilojoules by 4.184 (or multiply by 0.239) and you’ve got kilocalories. So 2000 kJ is roughly 478 kcal, 500 kJ is about 120 kcal, and a label that lists 837 kJ is right around 200 kcal. No formula, no offset, just one constant doing the work.
Why labels show kJ at all
Quick bit of context. The kilojoule is the official SI unit for energy, so most of the world prints food energy in kJ, sometimes alongside kcal, sometimes alone. The European Union requires kJ on packaging (kcal usually appears next to it), and Australia and New Zealand lean on kJ almost exclusively, which catches a lot of travelers off guard. The US and UK, meanwhile, front the “Calorie” figure, which is really a kilocalorie.
So when an Australian muesli bar says “850 kJ” and you’re used to thinking in 200-calorie snack terms, the conversion tells you it’s about 203 kcal. Same energy, just labeled for a different audience.
Reference points worth remembering
Label energy tends to cluster in a few spots: 500 kJ is 119.5 kcal, 1000 kJ is 239 kcal, and 2000 kJ is 478 kcal. The one worth memorizing is 8700 kJ, the daily energy reference printed on Australian labels, which works out to 2079 kcal, right by the familiar 2000 kcal guideline. Every value in the table above is already converted, and the free field handles whatever isn’t listed.
How to use it
Type a kilojoule value and the kilocalorie result appears instantly, no submit button. The table above lists common label amounts already converted, so for standard figures you can read it straight off. All the math runs in your browser using the exact 4.184 factor, which means nothing you enter gets uploaded and it works offline once the page has loaded.
For a fast mental estimate, divide kJ by 4 instead of 4.184. It overshoots the kcal slightly (by about 4.6%), but it’s good enough to gauge a snack at a glance. When you want the precise number, the tool uses the exact constant.
Common questions
How many kcal in a kJ?
0.239006 kcal per kilojoule. Put another way, one kilocalorie equals 4.184 kilojoules, so you divide kJ by 4.184 to get kcal.
What’s 1000 kJ in calories?
About 239 kcal. Since the “Calories” on a food label are actually kilocalories, 1000 kJ is roughly 239 of those label Calories.
What is 500 kJ in kcal?
119.5 kcal. A 500 kJ portion, roughly a small yogurt or a piece of fruit, is about 120 Calories in US or UK terms.
How many calories is 850 kJ?
203.2 kcal. An 850 kJ muesli bar, a common Australian snack size, is right around 203 Calories.
Why do some labels only show kJ?
Because the kilojoule is the official SI energy unit, and regions like Australia and New Zealand standardized on it. The EU requires kJ too, usually printing kcal alongside it.
Is the “Calorie” on my label the same as a kcal?
Yes. The food-label “Calorie” (capital C) is a kilocalorie, equal to 1000 small calories. So a kcal and a label Calorie are the same thing.
Does this calculate locally?
Yep. It’s browser-side arithmetic with the factor built in, so your numbers never leave your device and it runs without internet after loading.