Bulk convert a list
Paste many values — one per line, or separated by commas or spaces. A column copied from Excel works too. They are converted with the units chosen above.
How to convert kcal to kJ
One kilocalorie is 4.184 kilojoules. To turn kcal into kJ, multiply by 4.184 (or by 4.2 for a quick answer).
Formula: kJ = kcal × 4.184
Example: 500 kcal × 4.184 = 2,092 kJ
The "Calories" on a food label are kilocalories. So 500 Calories on a label is also 2,092 kJ.
Features
- Instant answer — type kcal in the From box and see the kJ as you type
- Formula line — under the boxes, see what 1 unit is in the other unit, both ways
- Swap (⇄) — turn kJ back into kcal in one click, with no rounding error
- kcal, not small calories — the Kilocalorie unit is the food "Calorie"; pick Calorie only for the small calorie
- Every unit in the list — kcal, kJ, calories, joules, Wh, kWh and BTU; or pick another Category, like length, weight or temperature
- Bulk convert a list — paste many kcal values, one per line or a column from Excel; each line keeps its place, and a line like "Box A 12.5" converts its number
- Three ways to show the list — Results only, Value and result or CSV (for Excel), with 0 to 6 Decimal places; then Copy results or Download CSV
- Private — it all runs in your browser; nothing is uploaded
kcal to kJ table
| Kilocalories (kcal) | Kilojoules (kJ) |
|---|---|
| 1 | 4.18 |
| 10 | 41.84 |
| 50 | 209.2 |
| 100 | 418.4 |
| 150 | 627.6 |
| 200 | 836.8 |
| 250 | 1,046 |
| 300 | 1,255.2 |
| 400 | 1,673.6 |
| 500 | 2,092 |
| 600 | 2,510.4 |
| 700 | 2,928.8 |
| 800 | 3,347.2 |
| 1,000 | 4,184 |
| 1,200 | 5,020.8 |
| 1,500 | 6,276 |
| 1,800 | 7,531.2 |
| 2,000 | 8,368 |
| 2,500 | 10,460 |
| 3,000 | 12,552 |
Values are rounded to 2 decimal places.
Bulk convert a list of kcal to kJ
Got a whole menu or a meal plan? Paste the values under Bulk convert a list and every line is converted at once — a bulk kcal to kJ converter on the same page.
- Paste values one per line, separated by commas or spaces, or a column copied from Excel or Google Sheets
- Lines keep their order; a line with text, like "Lunch 650", converts its number
- Show results only to paste back into your sheet, value and result, or CSV
- Pick the decimal places, then copy the results or download a CSV file
Kilocalories in daily life
- Food labels: in the US a label says "Calories"; in Europe and Australia it often shows kJ and kcal side by side
- A day of food: 2,000 kcal = 8,368 kJ
- A snack: 250 kcal = 1,046 kJ
- A meal: 600 kcal = 2,510 kJ
How to use it
- Type a number in the From box — the answer appears straight away
- Click Swap (⇄) to convert the other way, from kilojoules to kilocalories
- Change the units or the category to convert anything else — joules, watt-hours, kilowatt-hours, BTU and more
- Many values at once? Paste them under Bulk convert a list — one per line, or a column from Excel — and copy the results or download a CSV
Frequently asked questions
How many kJ is 1 kcal?
1 kilocalorie is 4.184 kilojoules.
Are kcal and Calories the same?
Yes. The "Calorie" with a capital C on food labels is one kilocalorie. A small "calorie" (cal) is 1,000 times smaller: 1 kcal = 1,000 cal.
How do I convert kcal to kJ in my head?
Multiply by 4, then add a little: 500 kcal → 2,000 + 100 = about 2,100 kJ (exact: 2,092).
Can I convert many kcal values at once?
Yes. Paste them under Bulk convert a list — one per line, or a column from Excel — and all of them are converted together. Copy the results or download them as a CSV file.
Is my data sent anywhere?
No. The conversion runs in your browser, on your own device.
Related tools
- kJ to kcal — the other way
- Calorie Calculator — how many calories you need a day
- Calories Burned Calculator — calories used by exercise
- Macro Calculator — protein, carbs and fat
- Unit Converter — every unit in one place
