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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 Btu (15.0°C) is the energy required to heat 1 avoirdupois pound of liquid water from 14.5 °C to 15.5°C at a pressure of one atmosphere and equates to 1054.804 J
| -20.000Btu (mean) | -20.020Btu (15.0 °C) |
| -19.000Btu (mean) | -19.019Btu (15.0 °C) |
| -18.000Btu (mean) | -18.018Btu (15.0 °C) |
| -17.000Btu (mean) | -17.017Btu (15.0 °C) |
| -16.000Btu (mean) | -16.016Btu (15.0 °C) |
| -15.000Btu (mean) | -15.015Btu (15.0 °C) |
| -14.000Btu (mean) | -14.014Btu (15.0 °C) |
| -13.000Btu (mean) | -13.013Btu (15.0 °C) |
| -12.000Btu (mean) | -12.012Btu (15.0 °C) |
| -11.000Btu (mean) | -11.011Btu (15.0 °C) |
| -10.000Btu (mean) | -10.010Btu (15.0 °C) |
| -9.0000Btu (mean) | -9.0091Btu (15.0 °C) |
| -8.0000Btu (mean) | -8.0081Btu (15.0 °C) |
| -7.0000Btu (mean) | -7.0071Btu (15.0 °C) |
| -6.0000Btu (mean) | -6.0061Btu (15.0 °C) |
| -5.0000Btu (mean) | -5.0051Btu (15.0 °C) |
| -4.0000Btu (mean) | -4.0040Btu (15.0 °C) |
| -3.0000Btu (mean) | -3.0030Btu (15.0 °C) |
| -2.0000Btu (mean) | -2.0020Btu (15.0 °C) |
| -1.0000Btu (mean) | -1.0010Btu (15.0 °C) |
| Btu (mean) | Btu (15°C) |
|---|---|
| 0.0000Btu (mean) | 0.0000Btu (15.0 °C) |
| 1.0000Btu (mean) | 1.0010Btu (15.0 °C) |
| 2.0000Btu (mean) | 2.0020Btu (15.0 °C) |
| 3.0000Btu (mean) | 3.0030Btu (15.0 °C) |
| 4.0000Btu (mean) | 4.0040Btu (15.0 °C) |
| 5.0000Btu (mean) | 5.0051Btu (15.0 °C) |
| 6.0000Btu (mean) | 6.0061Btu (15.0 °C) |
| 7.0000Btu (mean) | 7.0071Btu (15.0 °C) |
| 8.0000Btu (mean) | 8.0081Btu (15.0 °C) |
| 9.0000Btu (mean) | 9.0091Btu (15.0 °C) |
| 10.000Btu (mean) | 10.010Btu (15.0 °C) |
| 11.000Btu (mean) | 11.011Btu (15.0 °C) |
| 12.000Btu (mean) | 12.012Btu (15.0 °C) |
| 13.000Btu (mean) | 13.013Btu (15.0 °C) |
| 14.000Btu (mean) | 14.014Btu (15.0 °C) |
| 15.000Btu (mean) | 15.015Btu (15.0 °C) |
| 16.000Btu (mean) | 16.016Btu (15.0 °C) |
| 17.000Btu (mean) | 17.017Btu (15.0 °C) |
| 18.000Btu (mean) | 18.018Btu (15.0 °C) |
| 19.000Btu (mean) | 19.019Btu (15.0 °C) |
| Btu (mean) | Btu (15°C) |
|---|---|
| 20.000Btu (mean) | 20.020Btu (15.0 °C) |
| 21.000Btu (mean) | 21.021Btu (15.0 °C) |
| 22.000Btu (mean) | 22.022Btu (15.0 °C) |
| 23.000Btu (mean) | 23.023Btu (15.0 °C) |
| 24.000Btu (mean) | 24.024Btu (15.0 °C) |
| 25.000Btu (mean) | 25.025Btu (15.0 °C) |
| 26.000Btu (mean) | 26.026Btu (15.0 °C) |
| 27.000Btu (mean) | 27.027Btu (15.0 °C) |
| 28.000Btu (mean) | 28.028Btu (15.0 °C) |
| 29.000Btu (mean) | 29.029Btu (15.0 °C) |
| 30.000Btu (mean) | 30.030Btu (15.0 °C) |
| 31.000Btu (mean) | 31.031Btu (15.0 °C) |
| 32.000Btu (mean) | 32.032Btu (15.0 °C) |
| 33.000Btu (mean) | 33.033Btu (15.0 °C) |
| 34.000Btu (mean) | 34.034Btu (15.0 °C) |
| 35.000Btu (mean) | 35.035Btu (15.0 °C) |
| 36.000Btu (mean) | 36.036Btu (15.0 °C) |
| 37.000Btu (mean) | 37.037Btu (15.0 °C) |
| 38.000Btu (mean) | 38.038Btu (15.0 °C) |
| 39.000Btu (mean) | 39.039Btu (15.0 °C) |
| Btu (mean) | Btu (15°C) |
|---|---|
| 40.000Btu (mean) | 40.040Btu (15.0 °C) |
| 41.000Btu (mean) | 41.041Btu (15.0 °C) |
| 42.000Btu (mean) | 42.042Btu (15.0 °C) |
| 43.000Btu (mean) | 43.043Btu (15.0 °C) |
| 44.000Btu (mean) | 44.044Btu (15.0 °C) |
| 45.000Btu (mean) | 45.045Btu (15.0 °C) |
| 46.000Btu (mean) | 46.046Btu (15.0 °C) |
| 47.000Btu (mean) | 47.047Btu (15.0 °C) |
| 48.000Btu (mean) | 48.049Btu (15.0 °C) |
| 49.000Btu (mean) | 49.050Btu (15.0 °C) |
| 50.000Btu (mean) | 50.051Btu (15.0 °C) |
| 51.000Btu (mean) | 51.052Btu (15.0 °C) |
| 52.000Btu (mean) | 52.053Btu (15.0 °C) |
| 53.000Btu (mean) | 53.054Btu (15.0 °C) |
| 54.000Btu (mean) | 54.055Btu (15.0 °C) |
| 55.000Btu (mean) | 55.056Btu (15.0 °C) |
| 56.000Btu (mean) | 56.057Btu (15.0 °C) |
| 57.000Btu (mean) | 57.058Btu (15.0 °C) |
| 58.000Btu (mean) | 58.059Btu (15.0 °C) |
| 59.000Btu (mean) | 59.060Btu (15.0 °C) |
| 60.000Btu (mean) | 60.061Btu (15.0 °C) |
| 61.000Btu (mean) | 61.062Btu (15.0 °C) |
| 62.000Btu (mean) | 62.063Btu (15.0 °C) |
| 63.000Btu (mean) | 63.064Btu (15.0 °C) |
| 64.000Btu (mean) | 64.065Btu (15.0 °C) |
| 65.000Btu (mean) | 65.066Btu (15.0 °C) |
| 66.000Btu (mean) | 66.067Btu (15.0 °C) |
| 67.000Btu (mean) | 67.068Btu (15.0 °C) |
| 68.000Btu (mean) | 68.069Btu (15.0 °C) |
| 69.000Btu (mean) | 69.070Btu (15.0 °C) |
| 70.000Btu (mean) | 70.071Btu (15.0 °C) |
| 71.000Btu (mean) | 71.072Btu (15.0 °C) |
| 72.000Btu (mean) | 72.073Btu (15.0 °C) |
| 73.000Btu (mean) | 73.074Btu (15.0 °C) |
| 74.000Btu (mean) | 74.075Btu (15.0 °C) |
| 75.000Btu (mean) | 75.076Btu (15.0 °C) |
| 76.000Btu (mean) | 76.077Btu (15.0 °C) |
| 77.000Btu (mean) | 77.078Btu (15.0 °C) |
| 78.000Btu (mean) | 78.079Btu (15.0 °C) |
| 79.000Btu (mean) | 79.080Btu (15.0 °C) |