# Calories (15 °C, NBS 1939) to Btu (15.8°C, ISO)

Btu (15.8°C, ISO) to Calories (15 °C, NBS 1939) (Swap Units)

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## Calories (15 °C, NBS 1939) to Btu (15.8°C, ISO) formula

Btu (15.8°C, ISO) =
cal(NBS) * 0.0039695

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## 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 (15.8°C, ISO) formula

Btu (15.8°C, ISO) =
cal(NBS) * 0.0039695

## Btu (15.8°C, ISO)

One BTU is defined as the energy required at 1 atmosphere to heat 1 avoirdupois pound of liquid water by 1 degree Fahrenheit. One Btu (15.8°C, ISO) equates to 1,054.5 J

## Calories (15 °C, NBS 1939) to Btu (15.8°C, ISO) table

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< Smaller Values Larger Values >
Calories (15 °C, NBS 1939) Btu (15.8°C, ISO)
0cal(NBS) 0.00Btu (15.8°C, ISO)
1cal(NBS) 0.00Btu (15.8°C, ISO)
2cal(NBS) 0.01Btu (15.8°C, ISO)
3cal(NBS) 0.01Btu (15.8°C, ISO)
4cal(NBS) 0.02Btu (15.8°C, ISO)
5cal(NBS) 0.02Btu (15.8°C, ISO)
6cal(NBS) 0.02Btu (15.8°C, ISO)
7cal(NBS) 0.03Btu (15.8°C, ISO)
8cal(NBS) 0.03Btu (15.8°C, ISO)
9cal(NBS) 0.04Btu (15.8°C, ISO)
10cal(NBS) 0.04Btu (15.8°C, ISO)
11cal(NBS) 0.04Btu (15.8°C, ISO)
12cal(NBS) 0.05Btu (15.8°C, ISO)
13cal(NBS) 0.05Btu (15.8°C, ISO)
14cal(NBS) 0.06Btu (15.8°C, ISO)
15cal(NBS) 0.06Btu (15.8°C, ISO)
16cal(NBS) 0.06Btu (15.8°C, ISO)
17cal(NBS) 0.07Btu (15.8°C, ISO)
18cal(NBS) 0.07Btu (15.8°C, ISO)
19cal(NBS) 0.08Btu (15.8°C, ISO)
Calories (15 °C, NBS 1939) Btu (15.8°C, ISO)
20cal(NBS) 0.08Btu (15.8°C, ISO)
21cal(NBS) 0.08Btu (15.8°C, ISO)
22cal(NBS) 0.09Btu (15.8°C, ISO)
23cal(NBS) 0.09Btu (15.8°C, ISO)
24cal(NBS) 0.10Btu (15.8°C, ISO)
25cal(NBS) 0.10Btu (15.8°C, ISO)
26cal(NBS) 0.10Btu (15.8°C, ISO)
27cal(NBS) 0.11Btu (15.8°C, ISO)
28cal(NBS) 0.11Btu (15.8°C, ISO)
29cal(NBS) 0.12Btu (15.8°C, ISO)
30cal(NBS) 0.12Btu (15.8°C, ISO)
31cal(NBS) 0.12Btu (15.8°C, ISO)
32cal(NBS) 0.13Btu (15.8°C, ISO)
33cal(NBS) 0.13Btu (15.8°C, ISO)
34cal(NBS) 0.13Btu (15.8°C, ISO)
35cal(NBS) 0.14Btu (15.8°C, ISO)
36cal(NBS) 0.14Btu (15.8°C, ISO)
37cal(NBS) 0.15Btu (15.8°C, ISO)
38cal(NBS) 0.15Btu (15.8°C, ISO)
39cal(NBS) 0.15Btu (15.8°C, ISO)
Calories (15 °C, NBS 1939) Btu (15.8°C, ISO)
40cal(NBS) 0.16Btu (15.8°C, ISO)
41cal(NBS) 0.16Btu (15.8°C, ISO)
42cal(NBS) 0.17Btu (15.8°C, ISO)
43cal(NBS) 0.17Btu (15.8°C, ISO)
44cal(NBS) 0.17Btu (15.8°C, ISO)
45cal(NBS) 0.18Btu (15.8°C, ISO)
46cal(NBS) 0.18Btu (15.8°C, ISO)
47cal(NBS) 0.19Btu (15.8°C, ISO)
48cal(NBS) 0.19Btu (15.8°C, ISO)
49cal(NBS) 0.19Btu (15.8°C, ISO)
50cal(NBS) 0.20Btu (15.8°C, ISO)
51cal(NBS) 0.20Btu (15.8°C, ISO)
52cal(NBS) 0.21Btu (15.8°C, ISO)
53cal(NBS) 0.21Btu (15.8°C, ISO)
54cal(NBS) 0.21Btu (15.8°C, ISO)
55cal(NBS) 0.22Btu (15.8°C, ISO)
56cal(NBS) 0.22Btu (15.8°C, ISO)
57cal(NBS) 0.23Btu (15.8°C, ISO)
58cal(NBS) 0.23Btu (15.8°C, ISO)
59cal(NBS) 0.23Btu (15.8°C, ISO)