Calories (15 °C, NBS 1939) to Btu (mean) conversion

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Btu (mean) to Calories (15 °C, NBS 1939) (Swap Units)


Note: Fractional results are rounded to the nearest 1/64. For a more accurate answer please select 'decimal' from the options above the result.

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Note: For a pure decimal result please select 'decimal' from the options above the result.

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Calories (15 °C, NBS 1939) to Btu (mean) formula

Btu (mean) =
cal(NBS) * 0.0039643
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More information: Calories (15 °C, NBS 1939)
More information: Btu (mean)

Calories (15 °C, NBS 1939)

The National Bureau of Standards (NBS, now known as The National Institute of Standards and Technology) defined the cal15 as being the ammount of energy needed to warm 1g of water from 14.5°C to 15.5°C


Calories (15 °C, NBS 1939) to Btu (mean) formula

Btu (mean) =
cal(NBS) * 0.0039643

Btu (mean)

One BTU is the energy required to heat 1 avoirdupois pound of liquid water by 1 degree Fahrenheit, at a pressure of one atmosphere. The Btu (mean) uses a result averaged over water temperatures 0 to 100 °C (32.0 to 212.0 °F) which is approx. 1055.87 J


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

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< Smaller Values Larger Values >
Calories (15 °C, NBS 1939) Btu (mean)
0cal(NBS) 0.00Btu (mean)
1cal(NBS) 0.00Btu (mean)
2cal(NBS) 0.01Btu (mean)
3cal(NBS) 0.01Btu (mean)
4cal(NBS) 0.02Btu (mean)
5cal(NBS) 0.02Btu (mean)
6cal(NBS) 0.02Btu (mean)
7cal(NBS) 0.03Btu (mean)
8cal(NBS) 0.03Btu (mean)
9cal(NBS) 0.04Btu (mean)
10cal(NBS) 0.04Btu (mean)
11cal(NBS) 0.04Btu (mean)
12cal(NBS) 0.05Btu (mean)
13cal(NBS) 0.05Btu (mean)
14cal(NBS) 0.06Btu (mean)
15cal(NBS) 0.06Btu (mean)
16cal(NBS) 0.06Btu (mean)
17cal(NBS) 0.07Btu (mean)
18cal(NBS) 0.07Btu (mean)
19cal(NBS) 0.08Btu (mean)
Calories (15 °C, NBS 1939) Btu (mean)
20cal(NBS) 0.08Btu (mean)
21cal(NBS) 0.08Btu (mean)
22cal(NBS) 0.09Btu (mean)
23cal(NBS) 0.09Btu (mean)
24cal(NBS) 0.10Btu (mean)
25cal(NBS) 0.10Btu (mean)
26cal(NBS) 0.10Btu (mean)
27cal(NBS) 0.11Btu (mean)
28cal(NBS) 0.11Btu (mean)
29cal(NBS) 0.11Btu (mean)
30cal(NBS) 0.12Btu (mean)
31cal(NBS) 0.12Btu (mean)
32cal(NBS) 0.13Btu (mean)
33cal(NBS) 0.13Btu (mean)
34cal(NBS) 0.13Btu (mean)
35cal(NBS) 0.14Btu (mean)
36cal(NBS) 0.14Btu (mean)
37cal(NBS) 0.15Btu (mean)
38cal(NBS) 0.15Btu (mean)
39cal(NBS) 0.15Btu (mean)
Calories (15 °C, NBS 1939) Btu (mean)
40cal(NBS) 0.16Btu (mean)
41cal(NBS) 0.16Btu (mean)
42cal(NBS) 0.17Btu (mean)
43cal(NBS) 0.17Btu (mean)
44cal(NBS) 0.17Btu (mean)
45cal(NBS) 0.18Btu (mean)
46cal(NBS) 0.18Btu (mean)
47cal(NBS) 0.19Btu (mean)
48cal(NBS) 0.19Btu (mean)
49cal(NBS) 0.19Btu (mean)
50cal(NBS) 0.20Btu (mean)
51cal(NBS) 0.20Btu (mean)
52cal(NBS) 0.21Btu (mean)
53cal(NBS) 0.21Btu (mean)
54cal(NBS) 0.21Btu (mean)
55cal(NBS) 0.22Btu (mean)
56cal(NBS) 0.22Btu (mean)
57cal(NBS) 0.23Btu (mean)
58cal(NBS) 0.23Btu (mean)
59cal(NBS) 0.23Btu (mean)