Convert calories to BTUs

Enter the number of calories to convert into btus. Easy cal to btus conversion.
1 calorie =
0.0039656663 BTUs
(rounded to 8 digits)
A lower-case calorie, or small calorie, is the amount of energy required to heat one gram of water by one degree Celsius. This can vary depending on the temperature of water, but the ISO defines a calorie as 4.184 joules. This unit should not be confused with an upper-case Calorie, or kilocalorie, which is commonly used in food labeling.
A British thermal unit is the amount of energy required to heat a pound of water by 1 degree Fahrenheit. This can vary slightly depending on the temperature of the water, therefore different estimates for the BTU exist. The International Standards Organization defines a BTU as 1055.056 joules.
calories to BTUs Conversion Table
(some results rounded)
cal btus
1 0.0039657
2 0.0079313
3 0.011897
4 0.015863
5 0.019828
6 0.023794
7 0.027760
8 0.031725
9 0.035691
10 0.039657
11 0.043622
12 0.047588
13 0.051554
14 0.055519
15 0.059485
16 0.063451
17 0.067416
18 0.071382
19 0.075348
20 0.079313
21 0.083279
22 0.087245
23 0.091210
24 0.095176
25 0.099142
26 0.10311
27 0.10707
28 0.11104
29 0.11500
30 0.11897
31 0.12294
32 0.12690
33 0.13087
34 0.13483
35 0.13880
36 0.14276
37 0.14673
38 0.15070
39 0.15466
40 0.15863
41 0.16259
42 0.16656
43 0.17052
44 0.17449
45 0.17845
46 0.18242
47 0.18639
48 0.19035
49 0.19432
50 0.19828
51 0.20225
52 0.20621
53 0.21018
54 0.21415
55 0.21811
56 0.22208
57 0.22604
58 0.23001
59 0.23397
60 0.23794
61 0.24191
62 0.24587
63 0.24984
64 0.25380
65 0.25777
66 0.26173
67 0.26570
68 0.26967
69 0.27363
70 0.27760
71 0.28156
72 0.28553
73 0.28949
74 0.29346
75 0.29742
76 0.30139
77 0.30536
78 0.30932
79 0.31329
80 0.31725
81 0.32122
82 0.32518
83 0.32915
84 0.33312
85 0.33708
86 0.34105
87 0.34501
88 0.34898
89 0.35294
90 0.35691
91 0.36088
92 0.36484
93 0.36881
94 0.37277
95 0.37674
96 0.38070
97 0.38467
98 0.38864
99 0.39260
100 0.39657
101 0.40053
102 0.40450
103 0.40846
104 0.41243
105 0.41639
106 0.42036
107 0.42433
108 0.42829
109 0.43226
110 0.43622
111 0.44019
112 0.44415
113 0.44812
114 0.45209
115 0.45605
116 0.46002
117 0.46398
118 0.46795
119 0.47191
120 0.47588
121 0.47985
122 0.48381
123 0.48778
124 0.49174
125 0.49571
126 0.49967
127 0.50364
128 0.50761
129 0.51157
130 0.51554
131 0.51950
132 0.52347
133 0.52743
134 0.53140
135 0.53536
cal btus
136 0.53933
137 0.54330
138 0.54726
139 0.55123
140 0.55519
141 0.55916
142 0.56312
143 0.56709
144 0.57106
145 0.57502
146 0.57899
147 0.58295
148 0.58692
149 0.59088
150 0.59485
151 0.59882
152 0.60278
153 0.60675
154 0.61071
155 0.61468
156 0.61864
157 0.62261
158 0.62658
159 0.63054
160 0.63451
161 0.63847
162 0.64244
163 0.64640
164 0.65037
165 0.65433
166 0.65830
167 0.66227
168 0.66623
169 0.67020
170 0.67416
171 0.67813
172 0.68209
173 0.68606
174 0.69003
175 0.69399
176 0.69796
177 0.70192
178 0.70589
179 0.70985
180 0.71382
181 0.71779
182 0.72175
183 0.72572
184 0.72968
185 0.73365
186 0.73761
187 0.74158
188 0.74555
189 0.74951
190 0.75348
191 0.75744
192 0.76141
193 0.76537
194 0.76934
195 0.77330
196 0.77727
197 0.78124
198 0.78520
199 0.78917
200 0.79313
201 0.79710
202 0.80106
203 0.80503
204 0.80900
205 0.81296
206 0.81693
207 0.82089
208 0.82486
209 0.82882
210 0.83279
211 0.83676
212 0.84072
213 0.84469
214 0.84865
215 0.85262
216 0.85658
217 0.86055
218 0.86452
219 0.86848
220 0.87245
221 0.87641
222 0.88038
223 0.88434
224 0.88831
225 0.89227
226 0.89624
227 0.90021
228 0.90417
229 0.90814
230 0.91210
231 0.91607
232 0.92003
233 0.92400
234 0.92797
235 0.93193
236 0.93590
237 0.93986
238 0.94383
239 0.94779
240 0.95176
241 0.95573
242 0.95969
243 0.96366
244 0.96762
245 0.97159
246 0.97555
247 0.97952
248 0.98349
249 0.98745
250 0.99142
251 0.99538
252 0.99935
253 1.0033
254 1.0073
255 1.0112
256 1.0152
257 1.0192
258 1.0231
259 1.0271
260 1.0311
261 1.0350
262 1.0390
263 1.0430
264 1.0469
265 1.0509
266 1.0549
267 1.0588
268 1.0628
269 1.0668
270 1.0707
cal btus
271 1.0747
272 1.0787
273 1.0826
274 1.0866
275 1.0906
276 1.0945
277 1.0985
278 1.1025
279 1.1064
280 1.1104
281 1.1144
282 1.1183
283 1.1223
284 1.1262
285 1.1302
286 1.1342
287 1.1381
288 1.1421
289 1.1461
290 1.1500
291 1.1540
292 1.1580
293 1.1619
294 1.1659
295 1.1699
296 1.1738
297 1.1778
298 1.1818
299 1.1857
300 1.1897
305 1.2095
310 1.2294
315 1.2492
320 1.2690
325 1.2888
330 1.3087
335 1.3285
340 1.3483
345 1.3682
350 1.3880
355 1.4078
360 1.4276
365 1.4475
370 1.4673
375 1.4871
380 1.5070
385 1.5268
390 1.5466
395 1.5664
400 1.5863
405 1.6061
410 1.6259
415 1.6458
420 1.6656
425 1.6854
430 1.7052
435 1.7251
440 1.7449
445 1.7647
450 1.7845
455 1.8044
460 1.8242
465 1.8440
470 1.8639
475 1.8837
480 1.9035
485 1.9233
490 1.9432
495 1.9630
500 1.9828
505 2.0027
510 2.0225
515 2.0423
520 2.0621
525 2.0820
530 2.1018
535 2.1216
540 2.1415
545 2.1613
550 2.1811
555 2.2009
560 2.2208
565 2.2406
570 2.2604
575 2.2803
580 2.3001
585 2.3199
590 2.3397
595 2.3596
600 2.3794
605 2.3992
610 2.4191
615 2.4389
620 2.4587
625 2.4785
630 2.4984
635 2.5182
640 2.5380
645 2.5579
650 2.5777
655 2.5975
660 2.6173
665 2.6372
670 2.6570
675 2.6768
680 2.6967
685 2.7165
690 2.7363
695 2.7561
700 2.7760
705 2.7958
710 2.8156
715 2.8355
720 2.8553
725 2.8751
730 2.8949
735 2.9148
740 2.9346
745 2.9544
750 2.9742
755 2.9941
760 3.0139
765 3.0337
770 3.0536
775 3.0734
780 3.0932
785 3.1130
790 3.1329
795 3.1527
800 3.1725
805 3.1924
810 3.2122
815 3.2320
820 3.2518
825 3.2717
cal btus
830 3.2915
835 3.3113
840 3.3312
845 3.3510
850 3.3708
855 3.3906
860 3.4105
865 3.4303
870 3.4501
875 3.4700
880 3.4898
885 3.5096
890 3.5294
895 3.5493
900 3.5691
905 3.5889
910 3.6088
915 3.6286
920 3.6484
925 3.6682
930 3.6881
935 3.7079
940 3.7277
945 3.7476
950 3.7674
955 3.7872
960 3.8070
965 3.8269
970 3.8467
975 3.8665
980 3.8864
985 3.9062
990 3.9260
995 3.9458
1,000 3.9657
1,100 4.3622
1,200 4.7588
1,300 5.1554
1,400 5.5519
1,500 5.9485
1,600 6.3451
1,700 6.7416
1,800 7.1382
1,900 7.5348
2,000 7.9313
2,100 8.3279
2,200 8.7245
2,300 9.1210
2,400 9.5176
2,500 9.9142
2,600 10.311
2,700 10.707
2,800 11.104
2,900 11.500
3,000 11.897
3,100 12.294
3,200 12.690
3,300 13.087
3,400 13.483
3,500 13.880
3,600 14.276
3,700 14.673
3,800 15.070
3,900 15.466
4,000 15.863
4,100 16.259
4,200 16.656
4,300 17.052
4,400 17.449
4,500 17.845
4,600 18.242
4,700 18.639
4,800 19.035
4,900 19.432
5,000 19.828
5,100 20.225
5,200 20.621
5,300 21.018
5,400 21.415
5,500 21.811
5,600 22.208
5,700 22.604
5,800 23.001
5,900 23.397
6,000 23.794
6,100 24.191
6,200 24.587
6,300 24.984
6,400 25.380
6,500 25.777
6,600 26.173
6,700 26.570
6,800 26.967
6,900 27.363
7,000 27.760
7,100 28.156
7,200 28.553
7,300 28.949
7,400 29.346
7,500 29.742
7,600 30.139
7,700 30.536
7,800 30.932
7,900 31.329
8,000 31.725
8,100 32.122
8,200 32.518
8,300 32.915
8,400 33.312
8,500 33.708
8,600 34.105
8,700 34.501
8,800 34.898
8,900 35.294
9,000 35.691
9,100 36.088
9,200 36.484
9,300 36.881
9,400 37.277
9,500 37.674
9,600 38.070
9,700 38.467
9,800 38.864
9,900 39.260
10,000 39.657
20,000 79.313
30,000 118.97
40,000 158.63
50,000 198.28
60,000 237.94
70,000 277.60
80,000 317.25
90,000 356.91
100,000 396.57