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Calories to Joules Converter

Type an amount in calories to see it in joules and other energy units.

Enter the value

Result

1 cal =
4.184 J
1 cal in other units
UnitValue
Joule (J)4.184
Kilojoule (kJ)0.004184
Kilocalorie (kcal)0.001
Watt-hour (Wh)0.00116222
Kilowatt-hour (kWh)0.00000116
British thermal unit (BTU)0.00396567

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 calorie = 4.184 joules, so to convert calories to joules, multiply by 4.184. To go the other way, 1 joule = 0.23900574 calories.

A food Calorie is a kilocalorie (1,000 small calories). Use the Kcal pages for food energy.

Formula

  • joules = calories × 4.184
  • calories = joules × 0.23900574

cal to J conversion chart

Calorie (cal) converted to Joule (J)
calJ
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

J to cal

Joule (J) converted to Calorie (cal)
Jcal
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 cal = 4.184 J
  • 5 cal = 20.92 J
  • 10 cal = 41.84 J
  • 50 cal = 209.2 J
  • 100 cal = 418.4 J

Tips

  • A food Calorie is a kilocalorie (1,000 small calories). Use the Kcal pages for food energy.
  • 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 joules are in 1 calorie?

1 calorie = 4.184 joules.

How many calories are in 1 joule?

1 joule = 0.23900574 calories.

How do I convert calories to joules?

Multiply the number of calories 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.