1cal(NBS) = 0.00397Btu (I.T., pre-1956)
Note: You can increase or decrease the accuracy of this answer by selecting the number of significant figures required from the options above the result.
Calories (15 °C, NBS 1939) to Btu (I.T., pre-1956) conversion formula
Btu (I.T., pre-1956) = Calories (15 °C, NBS 1939) / 252.05233615
Calories (15 °C, NBS 1939) to Btu (I.T., pre-1956) calculation
Btu (I.T., pre-1956) = Calories (15 °C, NBS 1939) / 252.05233615
Btu (I.T., pre-1956) = 1 / 252.05231734349
Btu (I.T., pre-1956) = 0.00397
Calories (15 °C, NBS 1939) to Btu (I.T., pre-1956) table
Starting value
Increment
Accuracy
Calories (15 °C, NBS 1939)
Btu (I.T., pre-1956)
0cal(NBS)
0.00000Btu (I.T., pre-1956)
1cal(NBS)
0.00397Btu (I.T., pre-1956)
2cal(NBS)
0.00793Btu (I.T., pre-1956)
3cal(NBS)
0.01190Btu (I.T., pre-1956)
4cal(NBS)
0.01587Btu (I.T., pre-1956)
5cal(NBS)
0.01984Btu (I.T., pre-1956)
6cal(NBS)
0.02380Btu (I.T., pre-1956)
7cal(NBS)
0.02777Btu (I.T., pre-1956)
8cal(NBS)
0.03174Btu (I.T., pre-1956)
9cal(NBS)
0.03571Btu (I.T., pre-1956)
10cal(NBS)
0.03967Btu (I.T., pre-1956)
11cal(NBS)
0.04364Btu (I.T., pre-1956)
12cal(NBS)
0.04761Btu (I.T., pre-1956)
13cal(NBS)
0.05158Btu (I.T., pre-1956)
14cal(NBS)
0.05554Btu (I.T., pre-1956)
15cal(NBS)
0.05951Btu (I.T., pre-1956)
16cal(NBS)
0.06348Btu (I.T., pre-1956)
17cal(NBS)
0.06745Btu (I.T., pre-1956)
18cal(NBS)
0.07141Btu (I.T., pre-1956)
19cal(NBS)
0.07538Btu (I.T., pre-1956)
20cal(NBS)
0.07935Btu (I.T., pre-1956)
21cal(NBS)
0.08332Btu (I.T., pre-1956)
22cal(NBS)
0.08728Btu (I.T., pre-1956)
23cal(NBS)
0.09125Btu (I.T., pre-1956)
24cal(NBS)
0.09522Btu (I.T., pre-1956)
25cal(NBS)
0.09919Btu (I.T., pre-1956)
26cal(NBS)
0.10315Btu (I.T., pre-1956)
27cal(NBS)
0.10712Btu (I.T., pre-1956)
28cal(NBS)
0.11109Btu (I.T., pre-1956)
29cal(NBS)
0.11506Btu (I.T., pre-1956)
30cal(NBS)
0.11902Btu (I.T., pre-1956)
31cal(NBS)
0.12299Btu (I.T., pre-1956)
32cal(NBS)
0.12696Btu (I.T., pre-1956)
33cal(NBS)
0.13093Btu (I.T., pre-1956)
34cal(NBS)
0.13489Btu (I.T., pre-1956)
35cal(NBS)
0.13886Btu (I.T., pre-1956)
36cal(NBS)
0.14283Btu (I.T., pre-1956)
37cal(NBS)
0.14679Btu (I.T., pre-1956)
38cal(NBS)
0.15076Btu (I.T., pre-1956)
39cal(NBS)
0.15473Btu (I.T., pre-1956)
40cal(NBS)
0.15870Btu (I.T., pre-1956)
41cal(NBS)
0.16266Btu (I.T., pre-1956)
42cal(NBS)
0.16663Btu (I.T., pre-1956)
43cal(NBS)
0.17060Btu (I.T., pre-1956)
44cal(NBS)
0.17457Btu (I.T., pre-1956)
45cal(NBS)
0.17853Btu (I.T., pre-1956)
46cal(NBS)
0.18250Btu (I.T., pre-1956)
47cal(NBS)
0.18647Btu (I.T., pre-1956)
48cal(NBS)
0.19044Btu (I.T., pre-1956)
49cal(NBS)
0.19440Btu (I.T., pre-1956)
50cal(NBS)
0.19837Btu (I.T., pre-1956)
51cal(NBS)
0.20234Btu (I.T., pre-1956)
52cal(NBS)
0.20631Btu (I.T., pre-1956)
53cal(NBS)
0.21027Btu (I.T., pre-1956)
54cal(NBS)
0.21424Btu (I.T., pre-1956)
55cal(NBS)
0.21821Btu (I.T., pre-1956)
56cal(NBS)
0.22218Btu (I.T., pre-1956)
57cal(NBS)
0.22614Btu (I.T., pre-1956)
58cal(NBS)
0.23011Btu (I.T., pre-1956)
59cal(NBS)
0.23408Btu (I.T., pre-1956)
60cal(NBS)
0.23805Btu (I.T., pre-1956)
61cal(NBS)
0.24201Btu (I.T., pre-1956)
62cal(NBS)
0.24598Btu (I.T., pre-1956)
63cal(NBS)
0.24995Btu (I.T., pre-1956)
64cal(NBS)
0.25392Btu (I.T., pre-1956)
65cal(NBS)
0.25788Btu (I.T., pre-1956)
66cal(NBS)
0.26185Btu (I.T., pre-1956)
67cal(NBS)
0.26582Btu (I.T., pre-1956)
68cal(NBS)
0.26979Btu (I.T., pre-1956)
69cal(NBS)
0.27375Btu (I.T., pre-1956)
70cal(NBS)
0.27772Btu (I.T., pre-1956)
71cal(NBS)
0.28169Btu (I.T., pre-1956)
72cal(NBS)
0.28565Btu (I.T., pre-1956)
73cal(NBS)
0.28962Btu (I.T., pre-1956)
74cal(NBS)
0.29359Btu (I.T., pre-1956)
75cal(NBS)
0.29756Btu (I.T., pre-1956)
76cal(NBS)
0.30152Btu (I.T., pre-1956)
77cal(NBS)
0.30549Btu (I.T., pre-1956)
78cal(NBS)
0.30946Btu (I.T., pre-1956)
79cal(NBS)
0.31343Btu (I.T., pre-1956)