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Calories to Joules Converter

Convert Calories to Joules instantly: 1 calorie (IT) = 4.1868 joules. Free calories to joules converter with formula, chart and examples.

1 calorie (IT) = 4.1868 joules

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Quick answer

To convert Calories to Joules, multiply the number of calories (IT) by 4.1868. For example, 10 Calories = 41.868 Joules.

Last updated · Conversion factors follow the SI definitions in the BIPM SI Brochure and NIST SP 811.

How to Convert Calories to Joules

The formula is joules = calories (IT) × 4.1868. 1 calorie (IT) = 4.1868 joules. Type any value in the converter above for an instant answer, or use the chart below for the most common values.

This page is preset for calorie (IT) to joule conversions, but you can switch either list to any of the 54 units in the Energy Converter, or go the other way with the Joules to Calories converter.

Calories to Joules conversion chart

CaloriesJoules
0.1 cal0.41868 J
0.25 cal1.0467 J
0.5 cal2.0934 J
1 cal4.1868 J
2 cal8.3736 J
3 cal12.5604 J
4 cal16.7472 J
5 cal20.934 J
6 cal25.1208 J
7 cal29.3076 J
8 cal33.4944 J
9 cal37.6812 J
10 cal41.868 J
11 cal46.0548 J
12 cal50.2416 J
13 cal54.4284 J
14 cal58.6152 J
15 cal62.802 J
16 cal66.9888 J
17 cal71.1756 J
18 cal75.3624 J
19 cal79.5492 J
20 cal83.736 J
25 cal104.67 J
30 cal125.604 J
40 cal167.472 J
50 cal209.34 J
60 cal251.208 J
70 cal293.076 J
75 cal314.01 J
80 cal334.944 J
90 cal376.812 J
100 cal418.68 J
150 cal628.02 J
200 cal837.36 J
250 cal1,046.7 J
500 cal2,093.4 J
1,000 cal4,186.8 J
4,184 cal17,517.571 J

Common Calories to Joules conversions

  • 1 calorie (IT) = 4.1868 joules
  • 1 cal = 4.1868 J
  • 10 cal = 41.868 J
  • 100 cal = 418.68 J
  • 1,000 cal = 4,186.8 J
  • 4,184 cal = 17,517.571 J

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How to Use the Calories to Joules Converter

  1. Type a value in the From box and choose its unit.
  2. Pick the unit you want in the To list — the result updates as you type.
  3. Use the swap button to reverse the conversion, or type in the To box to convert backwards.
  4. Check the All conversions table to see your value in every unit; click a row to make it the target.

Frequently Asked Questions

How many joules are in a calorie (IT)?

There are 4.1868 joules in 1 calorie (IT). Going the other way, 1 joule = 0.2388458966 calories (IT).

How do I convert Calories to Joules?

Use the formula joules = calories (IT) × 4.1868. For example, 1 calorie (IT) = 4.1868 joules. Or type the value in the converter above and the answer appears as you type.

What is the Calories to Joules formula?

joules = calories (IT) × 4.1868 — the conversion factor is exact, using the international definitions of both units.

What is 1 Calories in Joules?

1 Calories = 4.1868 Joules.

What is 10 Calories in Joules?

10 Calories = 41.868 Joules.

What is 100 Calories in Joules?

100 Calories = 418.68 Joules.

What is 1,000 Calories in Joules?

1,000 Calories = 4,186.8 Joules.

What is 4,184 Calories in Joules?

4,184 Calories = 17,517.571 Joules.

How do I convert Joules back to Calories?

Use the swap button in the converter above, or open our Joules to Calories converter. calories (IT) = joules ÷ 4.1868.

Is this Calories to Joules converter accurate?

Yes. It uses exact unit definitions and double-precision maths, and you can show up to 15 significant digits. The table below is calculated with the same formula.

Can I convert Calories to other energy units?

Yes — pick any unit in the From and To lists above, or open the full Energy Converter, which handles 54 energy units.

Is the Calories to Joules converter free?

Yes, it is free with no sign-up, and every conversion runs in your browser so nothing is sent to a server.