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The thermochemical calorie was defined in 1930 by Frederick Rossini as 4.1833 joules. The change to absolute electrical units in 1948 involved redefining the thermochemical calorie as 4.184 joules (in order to keep the same quantity of energy represented by it). The thermochemical kilogram calorie is equal to 1,000 times that value - 4,184 J.
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 (Kilogram,thermoc.) | Calories (15 °C, NBS 1939) |
|---|---|
| 0Calorie (Kilogram,thermoc.) | 0.00cal(NBS) |
| 1Calorie (Kilogram,thermoc.) | 999.57cal(NBS) |
| 2Calorie (Kilogram,thermoc.) | 1999.14cal(NBS) |
| 3Calorie (Kilogram,thermoc.) | 2998.71cal(NBS) |
| 4Calorie (Kilogram,thermoc.) | 3998.28cal(NBS) |
| 5Calorie (Kilogram,thermoc.) | 4997.85cal(NBS) |
| 6Calorie (Kilogram,thermoc.) | 5997.42cal(NBS) |
| 7Calorie (Kilogram,thermoc.) | 6996.99cal(NBS) |
| 8Calorie (Kilogram,thermoc.) | 7996.56cal(NBS) |
| 9Calorie (Kilogram,thermoc.) | 8996.13cal(NBS) |
| 10Calorie (Kilogram,thermoc.) | 9995.70cal(NBS) |
| 11Calorie (Kilogram,thermoc.) | 10995.27cal(NBS) |
| 12Calorie (Kilogram,thermoc.) | 11994.84cal(NBS) |
| 13Calorie (Kilogram,thermoc.) | 12994.41cal(NBS) |
| 14Calorie (Kilogram,thermoc.) | 13993.98cal(NBS) |
| 15Calorie (Kilogram,thermoc.) | 14993.55cal(NBS) |
| 16Calorie (Kilogram,thermoc.) | 15993.12cal(NBS) |
| 17Calorie (Kilogram,thermoc.) | 16992.69cal(NBS) |
| 18Calorie (Kilogram,thermoc.) | 17992.26cal(NBS) |
| 19Calorie (Kilogram,thermoc.) | 18991.83cal(NBS) |
| Calories (Kilogram,thermoc.) | Calories (15 °C, NBS 1939) |
|---|---|
| 20Calorie (Kilogram,thermoc.) | 19991.40cal(NBS) |
| 21Calorie (Kilogram,thermoc.) | 20990.97cal(NBS) |
| 22Calorie (Kilogram,thermoc.) | 21990.54cal(NBS) |
| 23Calorie (Kilogram,thermoc.) | 22990.11cal(NBS) |
| 24Calorie (Kilogram,thermoc.) | 23989.68cal(NBS) |
| 25Calorie (Kilogram,thermoc.) | 24989.25cal(NBS) |
| 26Calorie (Kilogram,thermoc.) | 25988.82cal(NBS) |
| 27Calorie (Kilogram,thermoc.) | 26988.39cal(NBS) |
| 28Calorie (Kilogram,thermoc.) | 27987.96cal(NBS) |
| 29Calorie (Kilogram,thermoc.) | 28987.53cal(NBS) |
| 30Calorie (Kilogram,thermoc.) | 29987.10cal(NBS) |
| 31Calorie (Kilogram,thermoc.) | 30986.67cal(NBS) |
| 32Calorie (Kilogram,thermoc.) | 31986.24cal(NBS) |
| 33Calorie (Kilogram,thermoc.) | 32985.81cal(NBS) |
| 34Calorie (Kilogram,thermoc.) | 33985.38cal(NBS) |
| 35Calorie (Kilogram,thermoc.) | 34984.95cal(NBS) |
| 36Calorie (Kilogram,thermoc.) | 35984.52cal(NBS) |
| 37Calorie (Kilogram,thermoc.) | 36984.09cal(NBS) |
| 38Calorie (Kilogram,thermoc.) | 37983.66cal(NBS) |
| 39Calorie (Kilogram,thermoc.) | 38983.23cal(NBS) |
| Calories (Kilogram,thermoc.) | Calories (15 °C, NBS 1939) |
|---|---|
| 40Calorie (Kilogram,thermoc.) | 39982.80cal(NBS) |
| 41Calorie (Kilogram,thermoc.) | 40982.37cal(NBS) |
| 42Calorie (Kilogram,thermoc.) | 41981.94cal(NBS) |
| 43Calorie (Kilogram,thermoc.) | 42981.51cal(NBS) |
| 44Calorie (Kilogram,thermoc.) | 43981.08cal(NBS) |
| 45Calorie (Kilogram,thermoc.) | 44980.65cal(NBS) |
| 46Calorie (Kilogram,thermoc.) | 45980.22cal(NBS) |
| 47Calorie (Kilogram,thermoc.) | 46979.79cal(NBS) |
| 48Calorie (Kilogram,thermoc.) | 47979.36cal(NBS) |
| 49Calorie (Kilogram,thermoc.) | 48978.93cal(NBS) |
| 50Calorie (Kilogram,thermoc.) | 49978.50cal(NBS) |
| 51Calorie (Kilogram,thermoc.) | 50978.07cal(NBS) |
| 52Calorie (Kilogram,thermoc.) | 51977.64cal(NBS) |
| 53Calorie (Kilogram,thermoc.) | 52977.21cal(NBS) |
| 54Calorie (Kilogram,thermoc.) | 53976.78cal(NBS) |
| 55Calorie (Kilogram,thermoc.) | 54976.35cal(NBS) |
| 56Calorie (Kilogram,thermoc.) | 55975.92cal(NBS) |
| 57Calorie (Kilogram,thermoc.) | 56975.49cal(NBS) |
| 58Calorie (Kilogram,thermoc.) | 57975.06cal(NBS) |
| 59Calorie (Kilogram,thermoc.) | 58974.63cal(NBS) |