Calories (15 °C, NBS 1939) to Btu (thermoc.)

Metric Conversions.

1cal(NBS) = 0.00397Btu (thermoc.)

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

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

Btu (thermoc.) = Calories (15 °C, NBS 1939) / 251.88726534

Calories (15 °C, NBS 1939) to Btu (thermoc.) calculation

Btu (thermoc.) = Calories (15 °C, NBS 1939) / 251.88726534

Btu (thermoc.) = 1 / 251.88755138642

Btu (thermoc.) = 0.00397

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 (thermoc.)

The Btu (thermochemical) variant aligns with the thermochemical calorie and is defined as the amount of energy required to raise the temperature of one pound of water by one degree Fahrenheit at a constant pressure of one atmosphere and is equivalent to approximately 1,054.350 Joules.

 

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

Starting value
Increment
Accuracy
Calories (15 °C, NBS 1939)
Btu (thermoc.)
0cal(NBS)
0.00000Btu (thermoc.)
1cal(NBS)
0.00397Btu (thermoc.)
2cal(NBS)
0.00794Btu (thermoc.)
3cal(NBS)
0.01191Btu (thermoc.)
4cal(NBS)
0.01588Btu (thermoc.)
5cal(NBS)
0.01985Btu (thermoc.)
6cal(NBS)
0.02382Btu (thermoc.)
7cal(NBS)
0.02779Btu (thermoc.)
8cal(NBS)
0.03176Btu (thermoc.)
9cal(NBS)
0.03573Btu (thermoc.)
10cal(NBS)
0.03970Btu (thermoc.)
11cal(NBS)
0.04367Btu (thermoc.)
12cal(NBS)
0.04764Btu (thermoc.)
13cal(NBS)
0.05161Btu (thermoc.)
14cal(NBS)
0.05558Btu (thermoc.)
15cal(NBS)
0.05955Btu (thermoc.)
16cal(NBS)
0.06352Btu (thermoc.)
17cal(NBS)
0.06749Btu (thermoc.)
18cal(NBS)
0.07146Btu (thermoc.)
19cal(NBS)
0.07543Btu (thermoc.)
20cal(NBS)
0.07940Btu (thermoc.)
21cal(NBS)
0.08337Btu (thermoc.)
22cal(NBS)
0.08734Btu (thermoc.)
23cal(NBS)
0.09131Btu (thermoc.)
24cal(NBS)
0.09528Btu (thermoc.)
25cal(NBS)
0.09925Btu (thermoc.)
26cal(NBS)
0.10322Btu (thermoc.)
27cal(NBS)
0.10719Btu (thermoc.)
28cal(NBS)
0.11116Btu (thermoc.)
29cal(NBS)
0.11513Btu (thermoc.)
30cal(NBS)
0.11910Btu (thermoc.)
31cal(NBS)
0.12307Btu (thermoc.)
32cal(NBS)
0.12704Btu (thermoc.)
33cal(NBS)
0.13101Btu (thermoc.)
34cal(NBS)
0.13498Btu (thermoc.)
35cal(NBS)
0.13895Btu (thermoc.)
36cal(NBS)
0.14292Btu (thermoc.)
37cal(NBS)
0.14689Btu (thermoc.)
38cal(NBS)
0.15086Btu (thermoc.)
39cal(NBS)
0.15483Btu (thermoc.)
40cal(NBS)
0.15880Btu (thermoc.)
41cal(NBS)
0.16277Btu (thermoc.)
42cal(NBS)
0.16674Btu (thermoc.)
43cal(NBS)
0.17071Btu (thermoc.)
44cal(NBS)
0.17468Btu (thermoc.)
45cal(NBS)
0.17865Btu (thermoc.)
46cal(NBS)
0.18262Btu (thermoc.)
47cal(NBS)
0.18659Btu (thermoc.)
48cal(NBS)
0.19056Btu (thermoc.)
49cal(NBS)
0.19453Btu (thermoc.)
50cal(NBS)
0.19850Btu (thermoc.)
51cal(NBS)
0.20247Btu (thermoc.)
52cal(NBS)
0.20644Btu (thermoc.)
53cal(NBS)
0.21041Btu (thermoc.)
54cal(NBS)
0.21438Btu (thermoc.)
55cal(NBS)
0.21835Btu (thermoc.)
56cal(NBS)
0.22232Btu (thermoc.)
57cal(NBS)
0.22629Btu (thermoc.)
58cal(NBS)
0.23026Btu (thermoc.)
59cal(NBS)
0.23423Btu (thermoc.)
60cal(NBS)
0.23820Btu (thermoc.)
61cal(NBS)
0.24217Btu (thermoc.)
62cal(NBS)
0.24614Btu (thermoc.)
63cal(NBS)
0.25011Btu (thermoc.)
64cal(NBS)
0.25408Btu (thermoc.)
65cal(NBS)
0.25805Btu (thermoc.)
66cal(NBS)
0.26202Btu (thermoc.)
67cal(NBS)
0.26599Btu (thermoc.)
68cal(NBS)
0.26996Btu (thermoc.)
69cal(NBS)
0.27393Btu (thermoc.)
70cal(NBS)
0.27790Btu (thermoc.)
71cal(NBS)
0.28187Btu (thermoc.)
72cal(NBS)
0.28584Btu (thermoc.)
73cal(NBS)
0.28981Btu (thermoc.)
74cal(NBS)
0.29378Btu (thermoc.)
75cal(NBS)
0.29775Btu (thermoc.)
76cal(NBS)
0.30172Btu (thermoc.)
77cal(NBS)
0.30569Btu (thermoc.)
78cal(NBS)
0.30966Btu (thermoc.)
79cal(NBS)
0.31363Btu (thermoc.)