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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.
One BTU is the energy required to warm 1 avoirdupois pound of liquid water by 1 degree Fahrenheit, at one atmosphere. The Btu (3.9°C) uses the calorie value of water at the temperature of its maximum density
| -20.000Calorie (Kilogram,thermoc.) | -78.968Btu (3.9°C) |
| -19.000Calorie (Kilogram,thermoc.) | -75.020Btu (3.9°C) |
| -18.000Calorie (Kilogram,thermoc.) | -71.071Btu (3.9°C) |
| -17.000Calorie (Kilogram,thermoc.) | -67.123Btu (3.9°C) |
| -16.000Calorie (Kilogram,thermoc.) | -63.174Btu (3.9°C) |
| -15.000Calorie (Kilogram,thermoc.) | -59.226Btu (3.9°C) |
| -14.000Calorie (Kilogram,thermoc.) | -55.278Btu (3.9°C) |
| -13.000Calorie (Kilogram,thermoc.) | -51.329Btu (3.9°C) |
| -12.000Calorie (Kilogram,thermoc.) | -47.381Btu (3.9°C) |
| -11.000Calorie (Kilogram,thermoc.) | -43.432Btu (3.9°C) |
| -10.000Calorie (Kilogram,thermoc.) | -39.484Btu (3.9°C) |
| -9.0000Calorie (Kilogram,thermoc.) | -35.536Btu (3.9°C) |
| -8.0000Calorie (Kilogram,thermoc.) | -31.587Btu (3.9°C) |
| -7.0000Calorie (Kilogram,thermoc.) | -27.639Btu (3.9°C) |
| -6.0000Calorie (Kilogram,thermoc.) | -23.690Btu (3.9°C) |
| -5.0000Calorie (Kilogram,thermoc.) | -19.742Btu (3.9°C) |
| -4.0000Calorie (Kilogram,thermoc.) | -15.794Btu (3.9°C) |
| -3.0000Calorie (Kilogram,thermoc.) | -11.845Btu (3.9°C) |
| -2.0000Calorie (Kilogram,thermoc.) | -7.8968Btu (3.9°C) |
| -1.0000Calorie (Kilogram,thermoc.) | -3.9484Btu (3.9°C) |
| Calories (Kilogram,thermoc.) | Btu (3.9°C) |
|---|---|
| 0.0000Calorie (Kilogram,thermoc.) | 0.0000Btu (3.9°C) |
| 1.0000Calorie (Kilogram,thermoc.) | 3.9484Btu (3.9°C) |
| 2.0000Calorie (Kilogram,thermoc.) | 7.8968Btu (3.9°C) |
| 3.0000Calorie (Kilogram,thermoc.) | 11.845Btu (3.9°C) |
| 4.0000Calorie (Kilogram,thermoc.) | 15.794Btu (3.9°C) |
| 5.0000Calorie (Kilogram,thermoc.) | 19.742Btu (3.9°C) |
| 6.0000Calorie (Kilogram,thermoc.) | 23.690Btu (3.9°C) |
| 7.0000Calorie (Kilogram,thermoc.) | 27.639Btu (3.9°C) |
| 8.0000Calorie (Kilogram,thermoc.) | 31.587Btu (3.9°C) |
| 9.0000Calorie (Kilogram,thermoc.) | 35.536Btu (3.9°C) |
| 10.000Calorie (Kilogram,thermoc.) | 39.484Btu (3.9°C) |
| 11.000Calorie (Kilogram,thermoc.) | 43.432Btu (3.9°C) |
| 12.000Calorie (Kilogram,thermoc.) | 47.381Btu (3.9°C) |
| 13.000Calorie (Kilogram,thermoc.) | 51.329Btu (3.9°C) |
| 14.000Calorie (Kilogram,thermoc.) | 55.278Btu (3.9°C) |
| 15.000Calorie (Kilogram,thermoc.) | 59.226Btu (3.9°C) |
| 16.000Calorie (Kilogram,thermoc.) | 63.174Btu (3.9°C) |
| 17.000Calorie (Kilogram,thermoc.) | 67.123Btu (3.9°C) |
| 18.000Calorie (Kilogram,thermoc.) | 71.071Btu (3.9°C) |
| 19.000Calorie (Kilogram,thermoc.) | 75.020Btu (3.9°C) |
| Calories (Kilogram,thermoc.) | Btu (3.9°C) |
|---|---|
| 20.000Calorie (Kilogram,thermoc.) | 78.968Btu (3.9°C) |
| 21.000Calorie (Kilogram,thermoc.) | 82.916Btu (3.9°C) |
| 22.000Calorie (Kilogram,thermoc.) | 86.865Btu (3.9°C) |
| 23.000Calorie (Kilogram,thermoc.) | 90.813Btu (3.9°C) |
| 24.000Calorie (Kilogram,thermoc.) | 94.762Btu (3.9°C) |
| 25.000Calorie (Kilogram,thermoc.) | 98.710Btu (3.9°C) |
| 26.000Calorie (Kilogram,thermoc.) | 102.66Btu (3.9°C) |
| 27.000Calorie (Kilogram,thermoc.) | 106.61Btu (3.9°C) |
| 28.000Calorie (Kilogram,thermoc.) | 110.56Btu (3.9°C) |
| 29.000Calorie (Kilogram,thermoc.) | 114.50Btu (3.9°C) |
| 30.000Calorie (Kilogram,thermoc.) | 118.45Btu (3.9°C) |
| 31.000Calorie (Kilogram,thermoc.) | 122.40Btu (3.9°C) |
| 32.000Calorie (Kilogram,thermoc.) | 126.35Btu (3.9°C) |
| 33.000Calorie (Kilogram,thermoc.) | 130.30Btu (3.9°C) |
| 34.000Calorie (Kilogram,thermoc.) | 134.25Btu (3.9°C) |
| 35.000Calorie (Kilogram,thermoc.) | 138.19Btu (3.9°C) |
| 36.000Calorie (Kilogram,thermoc.) | 142.14Btu (3.9°C) |
| 37.000Calorie (Kilogram,thermoc.) | 146.09Btu (3.9°C) |
| 38.000Calorie (Kilogram,thermoc.) | 150.04Btu (3.9°C) |
| 39.000Calorie (Kilogram,thermoc.) | 153.99Btu (3.9°C) |
| Calories (Kilogram,thermoc.) | Btu (3.9°C) |
|---|---|
| 40.000Calorie (Kilogram,thermoc.) | 157.94Btu (3.9°C) |
| 41.000Calorie (Kilogram,thermoc.) | 161.88Btu (3.9°C) |
| 42.000Calorie (Kilogram,thermoc.) | 165.83Btu (3.9°C) |
| 43.000Calorie (Kilogram,thermoc.) | 169.78Btu (3.9°C) |
| 44.000Calorie (Kilogram,thermoc.) | 173.73Btu (3.9°C) |
| 45.000Calorie (Kilogram,thermoc.) | 177.68Btu (3.9°C) |
| 46.000Calorie (Kilogram,thermoc.) | 181.63Btu (3.9°C) |
| 47.000Calorie (Kilogram,thermoc.) | 185.57Btu (3.9°C) |
| 48.000Calorie (Kilogram,thermoc.) | 189.52Btu (3.9°C) |
| 49.000Calorie (Kilogram,thermoc.) | 193.47Btu (3.9°C) |
| 50.000Calorie (Kilogram,thermoc.) | 197.42Btu (3.9°C) |
| 51.000Calorie (Kilogram,thermoc.) | 201.37Btu (3.9°C) |
| 52.000Calorie (Kilogram,thermoc.) | 205.32Btu (3.9°C) |
| 53.000Calorie (Kilogram,thermoc.) | 209.27Btu (3.9°C) |
| 54.000Calorie (Kilogram,thermoc.) | 213.21Btu (3.9°C) |
| 55.000Calorie (Kilogram,thermoc.) | 217.16Btu (3.9°C) |
| 56.000Calorie (Kilogram,thermoc.) | 221.11Btu (3.9°C) |
| 57.000Calorie (Kilogram,thermoc.) | 225.06Btu (3.9°C) |
| 58.000Calorie (Kilogram,thermoc.) | 229.01Btu (3.9°C) |
| 59.000Calorie (Kilogram,thermoc.) | 232.96Btu (3.9°C) |
| 60.000Calorie (Kilogram,thermoc.) | 236.90Btu (3.9°C) |
| 61.000Calorie (Kilogram,thermoc.) | 240.85Btu (3.9°C) |
| 62.000Calorie (Kilogram,thermoc.) | 244.80Btu (3.9°C) |
| 63.000Calorie (Kilogram,thermoc.) | 248.75Btu (3.9°C) |
| 64.000Calorie (Kilogram,thermoc.) | 252.70Btu (3.9°C) |
| 65.000Calorie (Kilogram,thermoc.) | 256.65Btu (3.9°C) |
| 66.000Calorie (Kilogram,thermoc.) | 260.59Btu (3.9°C) |
| 67.000Calorie (Kilogram,thermoc.) | 264.54Btu (3.9°C) |
| 68.000Calorie (Kilogram,thermoc.) | 268.49Btu (3.9°C) |
| 69.000Calorie (Kilogram,thermoc.) | 272.44Btu (3.9°C) |
| 70.000Calorie (Kilogram,thermoc.) | 276.39Btu (3.9°C) |
| 71.000Calorie (Kilogram,thermoc.) | 280.34Btu (3.9°C) |
| 72.000Calorie (Kilogram,thermoc.) | 284.28Btu (3.9°C) |
| 73.000Calorie (Kilogram,thermoc.) | 288.23Btu (3.9°C) |
| 74.000Calorie (Kilogram,thermoc.) | 292.18Btu (3.9°C) |
| 75.000Calorie (Kilogram,thermoc.) | 296.13Btu (3.9°C) |
| 76.000Calorie (Kilogram,thermoc.) | 300.08Btu (3.9°C) |
| 77.000Calorie (Kilogram,thermoc.) | 304.03Btu (3.9°C) |
| 78.000Calorie (Kilogram,thermoc.) | 307.98Btu (3.9°C) |
| 79.000Calorie (Kilogram,thermoc.) | 311.92Btu (3.9°C) |