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Joules to Calories Converter

Type a value in joules to get calories instantly, or type in the calories (small) box to convert back. The formula with your number, related units and full tables are below.

JoulesFrom

Calories (small)To

cal

Decimal places

Step-by-step calculation

How to use the Joules to Calories Converter

Type a value in the Joules box. The calories (small) result appears instantly.
Going the other way? Type in the Calories (small) box, or press the ⇄ swap button.
Set the precision with the decimal places menu.
Check the working in the step-by-step box, then press Copy result or click any row in the tables below.

Joules to calories (small) formula

cal = J ÷ 4.184

Take the value in joules.
Divide it by 4.184 (the number of joules in one calorie).

Example: 1,000 J ÷ 4.184 = 239.006 cal.

Reverse formula (calories to joules): J = cal × 4.184. Example: 1,000 cal × 4.184 = 4,184 J.

Quick mental estimate: divide by about 4.2. For exact answers use the converter above.

J to cal conversion table (1–100)

Click any row to load it into the converter.

Joules to calories (small)

Joules	Calories (small)
1 J	0.239 cal
2 J	0.478 cal
3 J	0.717 cal
4 J	0.956 cal
5 J	1.195 cal
6 J	1.434 cal
7 J	1.673 cal
8 J	1.912 cal
9 J	2.151 cal
10 J	2.39 cal
11 J	2.629 cal
12 J	2.868 cal
13 J	3.107 cal
14 J	3.346 cal
15 J	3.585 cal
16 J	3.824 cal
17 J	4.063 cal
18 J	4.302 cal
19 J	4.541 cal
20 J	4.78 cal
21 J	5.019 cal
22 J	5.258 cal
23 J	5.497 cal
24 J	5.736 cal
25 J	5.975 cal
26 J	6.214 cal
27 J	6.453 cal
28 J	6.692 cal
29 J	6.931 cal
30 J	7.17 cal
31 J	7.409 cal
32 J	7.648 cal
33 J	7.887 cal
34 J	8.126 cal
35 J	8.365 cal
36 J	8.604 cal
37 J	8.843 cal
38 J	9.082 cal
39 J	9.321 cal
40 J	9.56 cal
41 J	9.799 cal
42 J	10.038 cal
43 J	10.277 cal
44 J	10.516 cal
45 J	10.755 cal
46 J	10.994 cal
47 J	11.233 cal
48 J	11.472 cal
49 J	11.711 cal
50 J	11.95 cal
51 J	12.189 cal
52 J	12.428 cal
53 J	12.667 cal
54 J	12.906 cal
55 J	13.145 cal
56 J	13.384 cal
57 J	13.623 cal
58 J	13.862 cal
59 J	14.101 cal
60 J	14.34 cal
61 J	14.579 cal
62 J	14.818 cal
63 J	15.057 cal
64 J	15.296 cal
65 J	15.535 cal
66 J	15.774 cal
67 J	16.013 cal
68 J	16.252 cal
69 J	16.491 cal
70 J	16.73 cal
71 J	16.969 cal
72 J	17.208 cal
73 J	17.447 cal
74 J	17.686 cal
75 J	17.925 cal
76 J	18.164 cal
77 J	18.403 cal
78 J	18.642 cal
79 J	18.881 cal
80 J	19.12 cal
81 J	19.359 cal
82 J	19.598 cal
83 J	19.837 cal
84 J	20.076 cal
85 J	20.315 cal
86 J	20.554 cal
87 J	20.793 cal
88 J	21.033 cal
89 J	21.272 cal
90 J	21.511 cal
91 J	21.75 cal
92 J	21.989 cal
93 J	22.228 cal
94 J	22.467 cal
95 J	22.706 cal
96 J	22.945 cal
97 J	23.184 cal
98 J	23.423 cal
99 J	23.662 cal
100 J	23.901 cal

Calories (small) to joules

Calories (small)	Joules
1 cal	4.184 J
2 cal	8.368 J
3 cal	12.552 J
4 cal	16.736 J
5 cal	20.92 J
6 cal	25.104 J
7 cal	29.288 J
8 cal	33.472 J
9 cal	37.656 J
10 cal	41.84 J
11 cal	46.024 J
12 cal	50.208 J
13 cal	54.392 J
14 cal	58.576 J
15 cal	62.76 J
16 cal	66.944 J
17 cal	71.128 J
18 cal	75.312 J
19 cal	79.496 J
20 cal	83.68 J
21 cal	87.864 J
22 cal	92.048 J
23 cal	96.232 J
24 cal	100.416 J
25 cal	104.6 J
26 cal	108.784 J
27 cal	112.968 J
28 cal	117.152 J
29 cal	121.336 J
30 cal	125.52 J
31 cal	129.704 J
32 cal	133.888 J
33 cal	138.072 J
34 cal	142.256 J
35 cal	146.44 J
36 cal	150.624 J
37 cal	154.808 J
38 cal	158.992 J
39 cal	163.176 J
40 cal	167.36 J
41 cal	171.544 J
42 cal	175.728 J
43 cal	179.912 J
44 cal	184.096 J
45 cal	188.28 J
46 cal	192.464 J
47 cal	196.648 J
48 cal	200.832 J
49 cal	205.016 J
50 cal	209.2 J
51 cal	213.384 J
52 cal	217.568 J
53 cal	221.752 J
54 cal	225.936 J
55 cal	230.12 J
56 cal	234.304 J
57 cal	238.488 J
58 cal	242.672 J
59 cal	246.856 J
60 cal	251.04 J
61 cal	255.224 J
62 cal	259.408 J
63 cal	263.592 J
64 cal	267.776 J
65 cal	271.96 J
66 cal	276.144 J
67 cal	280.328 J
68 cal	284.512 J
69 cal	288.696 J
70 cal	292.88 J
71 cal	297.064 J
72 cal	301.248 J
73 cal	305.432 J
74 cal	309.616 J
75 cal	313.8 J
76 cal	317.984 J
77 cal	322.168 J
78 cal	326.352 J
79 cal	330.536 J
80 cal	334.72 J
81 cal	338.904 J
82 cal	343.088 J
83 cal	347.272 J
84 cal	351.456 J
85 cal	355.64 J
86 cal	359.824 J
87 cal	364.008 J
88 cal	368.192 J
89 cal	372.376 J
90 cal	376.56 J
91 cal	380.744 J
92 cal	384.928 J
93 cal	389.112 J
94 cal	393.296 J
95 cal	397.48 J
96 cal	401.664 J
97 cal	405.848 J
98 cal	410.032 J
99 cal	414.216 J
100 cal	418.4 J

Common values

Joules	Calories (small)	Example
1 J	0.24 cal	1 J
4.18 J	1 cal	1 calorie
100 J	23.9 cal	100 J
1,000 J	239.01 cal	1 kJ
4,184 J	1,000 cal	1 kcal
10,000 J	2,390.06 cal	10,000 J
1,000,000 J	239,005.74 cal	1 MJ

About joules and calories (small)

Joules (J). The joule is the SI unit of energy: the work done by a force of one newton over one meter.

Calories (small) (cal). The small (thermochemical) calorie is 4.184 joules: about the energy needed to warm one gram of water by 1 °C.

Frequently asked questions

How many calories are in a joule?

One joule equals 0.239006 calories. Looking at it the other way, one calorie is 4.184 joules.

How do you convert joules to calories?

Divide the number of joules by 4.184. For example, 1,000 J ÷ 4.184 = 239.006 cal.

What is 4,184 joules in calories?

4,184 J is 1,000 cal (1 kcal).

How do I convert calories back to joules?

Multiply by 4.184, or press the ⇄ swap button above. For example, 1,000 cal × 4.184 = 4,184 J.

Are Calories on food labels kilocalories?

Yes. A food 'Calorie' (capital C) is 1 kilocalorie, which is 1,000 small calories or 4.184 kJ. A 2,000 Calorie diet is 2,000 kcal ≈ 8,368 kJ.

Does this converter work offline?

Once the page has loaded, the conversion runs entirely in your browser, so it keeps working without a connection. It is free and needs no sign-up.

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