Calories (15 °C, NBS 1939) to Btu (I.T.) conversion calculator

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1cal(NBS) = 0.00397Btu (I.T.)

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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.) conversion formula

Calories (15 °C, NBS 1939) to Btu (I.T.) conversion formula

Btu (I.T.) = Calories (15 °C, NBS 1939) / 252.05614803

1 Calories (15 °C, NBS 1939) to Btu (I.T.) calculation

Btu (I.T.) = Calories (15 °C, NBS 1939) / 252.05614803

Btu (I.T.) = 1 / 252.05596364375

Btu (I.T.) = 0.00397

Btu (I.T.) to Calories (15 °C, NBS 1939) (Swap units)

Calories (15 °C, NBS 1939)

The 15 °C NBS 1939 calorie is the amount of energy required to raise the temperature of one gram of water by one degree Celsius, from 14.5 °C to 15.5 °C, at standard atmospheric pressure. This specific definition was established by the National Bureau of Standards (NBS) in 1939.

Btu (I.T.)

The British thermal unit (International Table), Btu (IT), is about 1,055 joules, roughly the energy needed to warm one pound of water by one degree Fahrenheit. In the United States air conditioners and furnaces are rated in Btu per hour.

 

 

Calories (15 °C, NBS 1939) to Btu (I.T.) table

Starting value
Increment
Accuracy
Calories (15 °C, NBS 1939)
Btu (I.T.)
0cal(NBS)
0.00000Btu (I.T.)
1cal(NBS)
0.00397Btu (I.T.)
2cal(NBS)
0.00793Btu (I.T.)
3cal(NBS)
0.01190Btu (I.T.)
4cal(NBS)
0.01587Btu (I.T.)
5cal(NBS)
0.01984Btu (I.T.)
6cal(NBS)
0.02380Btu (I.T.)
7cal(NBS)
0.02777Btu (I.T.)
8cal(NBS)
0.03174Btu (I.T.)
9cal(NBS)
0.03571Btu (I.T.)
10cal(NBS)
0.03967Btu (I.T.)
11cal(NBS)
0.04364Btu (I.T.)
12cal(NBS)
0.04761Btu (I.T.)
13cal(NBS)
0.05158Btu (I.T.)
14cal(NBS)
0.05554Btu (I.T.)
15cal(NBS)
0.05951Btu (I.T.)
16cal(NBS)
0.06348Btu (I.T.)
17cal(NBS)
0.06745Btu (I.T.)
18cal(NBS)
0.07141Btu (I.T.)
19cal(NBS)
0.07538Btu (I.T.)
Calories (15 °C, NBS 1939)
Btu (I.T.)
20cal(NBS)
0.07935Btu (I.T.)
21cal(NBS)
0.08331Btu (I.T.)
22cal(NBS)
0.08728Btu (I.T.)
23cal(NBS)
0.09125Btu (I.T.)
24cal(NBS)
0.09522Btu (I.T.)
25cal(NBS)
0.09918Btu (I.T.)
26cal(NBS)
0.10315Btu (I.T.)
27cal(NBS)
0.10712Btu (I.T.)
28cal(NBS)
0.11109Btu (I.T.)
29cal(NBS)
0.11505Btu (I.T.)
30cal(NBS)
0.11902Btu (I.T.)
31cal(NBS)
0.12299Btu (I.T.)
32cal(NBS)
0.12696Btu (I.T.)
33cal(NBS)
0.13092Btu (I.T.)
34cal(NBS)
0.13489Btu (I.T.)
35cal(NBS)
0.13886Btu (I.T.)
36cal(NBS)
0.14283Btu (I.T.)
37cal(NBS)
0.14679Btu (I.T.)
38cal(NBS)
0.15076Btu (I.T.)
39cal(NBS)
0.15473Btu (I.T.)
Calories (15 °C, NBS 1939)
Btu (I.T.)
40cal(NBS)
0.15869Btu (I.T.)
41cal(NBS)
0.16266Btu (I.T.)
42cal(NBS)
0.16663Btu (I.T.)
43cal(NBS)
0.17060Btu (I.T.)
44cal(NBS)
0.17456Btu (I.T.)
45cal(NBS)
0.17853Btu (I.T.)
46cal(NBS)
0.18250Btu (I.T.)
47cal(NBS)
0.18647Btu (I.T.)
48cal(NBS)
0.19043Btu (I.T.)
49cal(NBS)
0.19440Btu (I.T.)
50cal(NBS)
0.19837Btu (I.T.)
51cal(NBS)
0.20234Btu (I.T.)
52cal(NBS)
0.20630Btu (I.T.)
53cal(NBS)
0.21027Btu (I.T.)
54cal(NBS)
0.21424Btu (I.T.)
55cal(NBS)
0.21821Btu (I.T.)
56cal(NBS)
0.22217Btu (I.T.)
57cal(NBS)
0.22614Btu (I.T.)
58cal(NBS)
0.23011Btu (I.T.)
59cal(NBS)
0.23408Btu (I.T.)
Calories (15 °C, NBS 1939)
Btu (I.T.)
60cal(NBS)
0.23804Btu (I.T.)
61cal(NBS)
0.24201Btu (I.T.)
62cal(NBS)
0.24598Btu (I.T.)
63cal(NBS)
0.24994Btu (I.T.)
64cal(NBS)
0.25391Btu (I.T.)
65cal(NBS)
0.25788Btu (I.T.)
66cal(NBS)
0.26185Btu (I.T.)
67cal(NBS)
0.26581Btu (I.T.)
68cal(NBS)
0.26978Btu (I.T.)
69cal(NBS)
0.27375Btu (I.T.)
70cal(NBS)
0.27772Btu (I.T.)
71cal(NBS)
0.28168Btu (I.T.)
72cal(NBS)
0.28565Btu (I.T.)
73cal(NBS)
0.28962Btu (I.T.)
74cal(NBS)
0.29359Btu (I.T.)
75cal(NBS)
0.29755Btu (I.T.)
76cal(NBS)
0.30152Btu (I.T.)
77cal(NBS)
0.30549Btu (I.T.)
78cal(NBS)
0.30946Btu (I.T.)
79cal(NBS)
0.31342Btu (I.T.)