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Kcal to kJ Converter

Type an amount in kilocalories to see it in kilojoules and other energy units.

Enter the value

Result

100 kcal =
418.4 kJ
100 kcal in other units
UnitValue
Joule (J)418,400
Kilojoule (kJ)418.4
Calorie (cal)100,000
Watt-hour (Wh)116.22222
Kilowatt-hour (kWh)0.11622222
British thermal unit (BTU)396.56668

How to use it

  1. Type the amount.
  2. Check the From and To units, or change them.
  3. Read the result. The table shows the same amount in other units.

About this tool

1 kilocalorie = 4.184 kilojoules, so to convert kilocalories to kilojoules, multiply by 4.184. To go the other way, 1 kilojoule = 0.23900574 kilocalories.

Food labels in Europe and Australia show kJ as well as kcal. One kcal is 4.184 kJ.

Formula

  • kilojoules = kilocalories × 4.184
  • kilocalories = kilojoules × 0.23900574

kcal to kJ conversion chart

Kilocalorie (kcal) converted to Kilojoule (kJ)
kcalkJ
0.52.092
14.184
28.368
312.552
416.736
520.92
625.104
729.288
833.472
937.656
1041.84
1562.76
2083.68
25104.6
30125.52
40167.36
50209.2
75313.8
100418.4
2501,046
5002,092
1,0004,184

kJ to kcal

Kilojoule (kJ) converted to Kilocalorie (kcal)
kJkcal
0.50.11950287
10.23900574
20.47801147
30.71701721
40.95602294
51.19503
61.43403
71.67304
81.91205
92.15105
102.39006
153.58509

Examples

  • 1 kcal = 4.184 kJ
  • 5 kcal = 20.92 kJ
  • 10 kcal = 41.84 kJ
  • 50 kcal = 209.2 kJ
  • 100 kcal = 418.4 kJ

Tips

  • Food labels in Europe and Australia show kJ as well as kcal. One kcal is 4.184 kJ.
  • Use Swap units to convert the other way.
  • Results are rounded for display. The exact factor is used in the calculation.

Questions and answers

How many kilojoules are in 1 kilocalorie?

1 kilocalorie = 4.184 kilojoules.

How many kilocalories are in 1 kilojoule?

1 kilojoule = 0.23900574 kilocalories.

How do I convert kilocalories to kilojoules?

Multiply the number of kilocalories by 4.184.

Are my numbers saved or sent anywhere?

No. The conversion runs in your browser on your own device. Nothing you type is sent to Paul Digital or any other server.

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Privacy

The conversion runs in your browser on your own device. Nothing you type is sent to Paul Digital or any other server. For work where accuracy matters, such as medicine, engineering or cooking times, check against the official measurement.