Note: Fractional results are rounded to the nearest 1/64. For a more accurate answer please select 'decimal' from the options above the result.
Note: You can increase or decrease the accuracy of this answer by selecting the number of significant figures required from the options above the result.
Note: For a pure decimal result please select 'decimal' from the options above the result.
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
One Calorie (20°C) is the amount of energy needed to raise the temperature of 1 gram of air-free water from 19.5 to 20.5 °C at atmospheric pressure.
| -20.000Btu (mean) | -5049.7cal20 |
| -19.000Btu (mean) | -4797.2cal20 |
| -18.000Btu (mean) | -4544.7cal20 |
| -17.000Btu (mean) | -4292.3cal20 |
| -16.000Btu (mean) | -4039.8cal20 |
| -15.000Btu (mean) | -3787.3cal20 |
| -14.000Btu (mean) | -3534.8cal20 |
| -13.000Btu (mean) | -3282.3cal20 |
| -12.000Btu (mean) | -3029.8cal20 |
| -11.000Btu (mean) | -2777.3cal20 |
| -10.000Btu (mean) | -2524.9cal20 |
| -9.0000Btu (mean) | -2272.4cal20 |
| -8.0000Btu (mean) | -2019.9cal20 |
| -7.0000Btu (mean) | -1767.4cal20 |
| -6.0000Btu (mean) | -1514.9cal20 |
| -5.0000Btu (mean) | -1262.4cal20 |
| -4.0000Btu (mean) | -1009.9cal20 |
| -3.0000Btu (mean) | -757.46cal20 |
| -2.0000Btu (mean) | -504.97cal20 |
| -1.0000Btu (mean) | -252.49cal20 |
| Btu (mean) | Calories (20°C) |
|---|---|
| 0.0000Btu (mean) | 0.0000cal20 |
| 1.0000Btu (mean) | 252.49cal20 |
| 2.0000Btu (mean) | 504.97cal20 |
| 3.0000Btu (mean) | 757.46cal20 |
| 4.0000Btu (mean) | 1009.9cal20 |
| 5.0000Btu (mean) | 1262.4cal20 |
| 6.0000Btu (mean) | 1514.9cal20 |
| 7.0000Btu (mean) | 1767.4cal20 |
| 8.0000Btu (mean) | 2019.9cal20 |
| 9.0000Btu (mean) | 2272.4cal20 |
| 10.000Btu (mean) | 2524.9cal20 |
| 11.000Btu (mean) | 2777.3cal20 |
| 12.000Btu (mean) | 3029.8cal20 |
| 13.000Btu (mean) | 3282.3cal20 |
| 14.000Btu (mean) | 3534.8cal20 |
| 15.000Btu (mean) | 3787.3cal20 |
| 16.000Btu (mean) | 4039.8cal20 |
| 17.000Btu (mean) | 4292.3cal20 |
| 18.000Btu (mean) | 4544.7cal20 |
| 19.000Btu (mean) | 4797.2cal20 |
| Btu (mean) | Calories (20°C) |
|---|---|
| 20.000Btu (mean) | 5049.7cal20 |
| 21.000Btu (mean) | 5302.2cal20 |
| 22.000Btu (mean) | 5554.7cal20 |
| 23.000Btu (mean) | 5807.2cal20 |
| 24.000Btu (mean) | 6059.7cal20 |
| 25.000Btu (mean) | 6312.1cal20 |
| 26.000Btu (mean) | 6564.6cal20 |
| 27.000Btu (mean) | 6817.1cal20 |
| 28.000Btu (mean) | 7069.6cal20 |
| 29.000Btu (mean) | 7322.1cal20 |
| 30.000Btu (mean) | 7574.6cal20 |
| 31.000Btu (mean) | 7827.1cal20 |
| 32.000Btu (mean) | 8079.5cal20 |
| 33.000Btu (mean) | 8332.0cal20 |
| 34.000Btu (mean) | 8584.5cal20 |
| 35.000Btu (mean) | 8837.0cal20 |
| 36.000Btu (mean) | 9089.5cal20 |
| 37.000Btu (mean) | 9342.0cal20 |
| 38.000Btu (mean) | 9594.5cal20 |
| 39.000Btu (mean) | 9846.9cal20 |
| Btu (mean) | Calories (20°C) |
|---|---|
| 40.000Btu (mean) | 10099cal20 |
| 41.000Btu (mean) | 10352cal20 |
| 42.000Btu (mean) | 10604cal20 |
| 43.000Btu (mean) | 10857cal20 |
| 44.000Btu (mean) | 11109cal20 |
| 45.000Btu (mean) | 11362cal20 |
| 46.000Btu (mean) | 11614cal20 |
| 47.000Btu (mean) | 11867cal20 |
| 48.000Btu (mean) | 12119cal20 |
| 49.000Btu (mean) | 12372cal20 |
| 50.000Btu (mean) | 12624cal20 |
| 51.000Btu (mean) | 12877cal20 |
| 52.000Btu (mean) | 13129cal20 |
| 53.000Btu (mean) | 13382cal20 |
| 54.000Btu (mean) | 13634cal20 |
| 55.000Btu (mean) | 13887cal20 |
| 56.000Btu (mean) | 14139cal20 |
| 57.000Btu (mean) | 14392cal20 |
| 58.000Btu (mean) | 14644cal20 |
| 59.000Btu (mean) | 14897cal20 |
| 60.000Btu (mean) | 15149cal20 |
| 61.000Btu (mean) | 15402cal20 |
| 62.000Btu (mean) | 15654cal20 |
| 63.000Btu (mean) | 15907cal20 |
| 64.000Btu (mean) | 16159cal20 |
| 65.000Btu (mean) | 16412cal20 |
| 66.000Btu (mean) | 16664cal20 |
| 67.000Btu (mean) | 16917cal20 |
| 68.000Btu (mean) | 17169cal20 |
| 69.000Btu (mean) | 17422cal20 |
| 70.000Btu (mean) | 17674cal20 |
| 71.000Btu (mean) | 17926cal20 |
| 72.000Btu (mean) | 18179cal20 |
| 73.000Btu (mean) | 18431cal20 |
| 74.000Btu (mean) | 18684cal20 |
| 75.000Btu (mean) | 18936cal20 |
| 76.000Btu (mean) | 19189cal20 |
| 77.000Btu (mean) | 19441cal20 |
| 78.000Btu (mean) | 19694cal20 |
| 79.000Btu (mean) | 19946cal20 |