Convert calories to British thermal units

Convert cal to BTU (Swap)

The "calories" unit is commonly confused with other units. Click for details.

The "calories" unit is commonly confused the units listed below which have similar names and/or values. Please ensure that you've selected the correct unit for the more accurate conversion!

calories, defined as 4.184 J
kilocalories, defined as 4,184 J

Converter

Guide

How to convert calories into British thermal units?

To convert calories into British thermal units, preform the following calculations:

1 cal = 0.0039657 BTU

energy in calories × 0.0039657 = energy in British thermal units

Example:

15 cal

15 calories × 0.0039657 = 0.059485 British thermal units

How many British thermal units in a calorie?

There are 0.0039657 British thermal units in a calorie.

How many calories in a British thermal unit?

There are 252.1644 calories in a British thermal unit.

Value Chart

Calories (cal)	British Thermal Units (BTU)
0 cal	0 BTU
0.01 cal	0.000039657 BTU
0.1 cal	0.00039657 BTU
0.2 cal	0.00079313 BTU
0.3 cal	0.0011897 BTU
0.4 cal	0.0015863 BTU
0.5 cal	0.0019828 BTU
0.6 cal	0.0023794 BTU
0.7 cal	0.002776 BTU
0.8 cal	0.0031725 BTU
0.9 cal	0.0035691 BTU
1 cal	0.0039657 BTU
1.2 cal	0.0047588 BTU
1.4 cal	0.0055519 BTU
1.6 cal	0.0063451 BTU
1.8 cal	0.0071382 BTU
2 cal	0.0079313 BTU
2.2 cal	0.0087245 BTU
2.4 cal	0.0095176 BTU
2.6 cal	0.010311 BTU
2.8 cal	0.011104 BTU
3 cal	0.011897 BTU
3.2 cal	0.01269 BTU
3.4 cal	0.013483 BTU
3.6 cal	0.014276 BTU
3.8 cal	0.01507 BTU
4 cal	0.015863 BTU
4.2 cal	0.016656 BTU
4.4 cal	0.017449 BTU
4.6 cal	0.018242 BTU
4.8 cal	0.019035 BTU
5 cal	0.019828 BTU
5.5 cal	0.021811 BTU
6 cal	0.023794 BTU
6.5 cal	0.025777 BTU
7 cal	0.02776 BTU
7.5 cal	0.029743 BTU
8 cal	0.031725 BTU
8.5 cal	0.033708 BTU
9 cal	0.035691 BTU
9.5 cal	0.037674 BTU
10 cal	0.039657 BTU
11 cal	0.043622 BTU
12 cal	0.047588 BTU
13 cal	0.051554 BTU
14 cal	0.055519 BTU
15 cal	0.059485 BTU
16 cal	0.063451 BTU
17 cal	0.067416 BTU
18 cal	0.071382 BTU
19 cal	0.075348 BTU
20 cal	0.079313 BTU
21 cal	0.083279 BTU
22 cal	0.087245 BTU
23 cal	0.09121 BTU
24 cal	0.095176 BTU
25 cal	0.099142 BTU
26 cal	0.10311 BTU
27 cal	0.10707 BTU
28 cal	0.11104 BTU
29 cal	0.115 BTU
30 cal	0.11897 BTU
31 cal	0.12294 BTU
32 cal	0.1269 BTU
33 cal	0.13087 BTU
34 cal	0.13483 BTU
35 cal	0.1388 BTU
36 cal	0.14276 BTU
37 cal	0.14673 BTU
38 cal	0.1507 BTU
39 cal	0.15466 BTU
40 cal	0.15863 BTU
41 cal	0.16259 BTU
42 cal	0.16656 BTU
43 cal	0.17052 BTU
44 cal	0.17449 BTU
45 cal	0.17846 BTU
46 cal	0.18242 BTU
47 cal	0.18639 BTU
48 cal	0.19035 BTU
49 cal	0.19432 BTU
50 cal	0.19828 BTU
52 cal	0.20621 BTU
54 cal	0.21415 BTU
56 cal	0.22208 BTU
58 cal	0.23001 BTU
60 cal	0.23794 BTU
62 cal	0.24587 BTU
64 cal	0.2538 BTU
66 cal	0.26173 BTU
68 cal	0.26967 BTU
70 cal	0.2776 BTU
72 cal	0.28553 BTU
74 cal	0.29346 BTU
76 cal	0.30139 BTU
78 cal	0.30932 BTU
80 cal	0.31725 BTU
82 cal	0.32518 BTU
84 cal	0.33312 BTU
86 cal	0.34105 BTU
88 cal	0.34898 BTU
90 cal	0.35691 BTU
92 cal	0.36484 BTU
94 cal	0.37277 BTU
96 cal	0.3807 BTU
98 cal	0.38864 BTU
100 cal	0.39657 BTU

Sources & References

UnitSwap uses sources (which are listed below) to ensure the best accuracy on conversions. See more information about reliable sources and conversion accuracy here.

Calories definition source: en.wikipedia.org
British Thermal Units definition source: en.wikipedia.org