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kJ to Kcal Converter

Type a value in kilojoules to get kilocalories instantly, or type in the kilocalories box to convert back. The formula with your number, related units and full tables are below.

KilojoulesFrom

KilocaloriesTo

kcal

Decimal places

Step-by-step calculation

How to use the kJ to Kcal Converter

Type a value in the Kilojoules box. The kilocalories result appears instantly.
Going the other way? Type in the Kilocalories 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.

Kilojoules to kilocalories formula

kcal = kJ ÷ 4.184

Take the value in kilojoules.
Divide it by 4.184 (the number of kilojoules in one kilocalorie).

Example: 1,000 kJ ÷ 4.184 = 239.006 kcal.

Reverse formula (kilocalories to kilojoules): kJ = kcal × 4.184. Example: 478.011 kcal × 4.184 = 2,000 kJ.

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

kJ to kcal conversion table (1–100)

Click any row to load it into the converter.

Kilojoules to kilocalories

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

Kilocalories to kilojoules

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

Common values

Kilojoules	Kilocalories	Example
1 kJ	0.24 kcal	1 kJ
100 kJ	23.9 kcal	100 kJ
418.4 kJ	100 kcal	100 kcal
500 kJ	119.5 kcal	500 kJ
1,000 kJ	239.01 kcal	1,000 kJ
2,000 kJ	478.01 kcal	2,000 kJ
4,184 kJ	1,000 kcal	1,000 kcal
8,700 kJ	2,079.35 kcal	Australian average daily intake

About kilojoules and kilocalories

Kilojoules (kJ). The kilojoule is 1,000 joules. Food energy is labelled in kJ in Australia, New Zealand and the EU.

Kilocalories (kcal). The kilocalorie is 1,000 small calories, defined here as 4,184 joules. The 'Calories' on food labels are kilocalories.

Frequently asked questions

How many kilocalories are in a kilojoule?

One kilojoule equals 0.239006 kilocalories. Looking at it the other way, one kilocalorie is 4.184 kilojoules.

How do you convert kilojoules to kilocalories?

Divide the number of kilojoules by 4.184. For example, 1,000 kJ ÷ 4.184 = 239.006 kcal.

What is 2,000 kilojoules in kilocalories?

2,000 kJ is 478.011 kcal.

How do I convert kilocalories back to kilojoules?

Multiply by 4.184, or press the ⇄ swap button above. For example, 478.011 kcal × 4.184 = 2,000 kJ.

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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