Note: Fractional results are rounded to the nearest 1/64. For a more accurate answer please select 'decimal' from the options above the result.
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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
The International Committee for Weights and Measures have defined one cal15 is the ammount of heat energy needed to raise the temperature of 1g of water from 14.5°C to 15.5°C
| -20.000Btu (mean) | -5045.4cal15 |
| -19.000Btu (mean) | -4793.1cal15 |
| -18.000Btu (mean) | -4540.8cal15 |
| -17.000Btu (mean) | -4288.6cal15 |
| -16.000Btu (mean) | -4036.3cal15 |
| -15.000Btu (mean) | -3784.0cal15 |
| -14.000Btu (mean) | -3531.8cal15 |
| -13.000Btu (mean) | -3279.5cal15 |
| -12.000Btu (mean) | -3027.2cal15 |
| -11.000Btu (mean) | -2775.0cal15 |
| -10.000Btu (mean) | -2522.7cal15 |
| -9.0000Btu (mean) | -2270.4cal15 |
| -8.0000Btu (mean) | -2018.1cal15 |
| -7.0000Btu (mean) | -1765.9cal15 |
| -6.0000Btu (mean) | -1513.6cal15 |
| -5.0000Btu (mean) | -1261.3cal15 |
| -4.0000Btu (mean) | -1009.1cal15 |
| -3.0000Btu (mean) | -756.81cal15 |
| -2.0000Btu (mean) | -504.54cal15 |
| -1.0000Btu (mean) | -252.27cal15 |
| Btu (mean) | Calories (15°C,CIPM, 1950) |
|---|---|
| 0.0000Btu (mean) | 0.0000cal15 |
| 1.0000Btu (mean) | 252.27cal15 |
| 2.0000Btu (mean) | 504.54cal15 |
| 3.0000Btu (mean) | 756.81cal15 |
| 4.0000Btu (mean) | 1009.1cal15 |
| 5.0000Btu (mean) | 1261.3cal15 |
| 6.0000Btu (mean) | 1513.6cal15 |
| 7.0000Btu (mean) | 1765.9cal15 |
| 8.0000Btu (mean) | 2018.1cal15 |
| 9.0000Btu (mean) | 2270.4cal15 |
| 10.000Btu (mean) | 2522.7cal15 |
| 11.000Btu (mean) | 2775.0cal15 |
| 12.000Btu (mean) | 3027.2cal15 |
| 13.000Btu (mean) | 3279.5cal15 |
| 14.000Btu (mean) | 3531.8cal15 |
| 15.000Btu (mean) | 3784.0cal15 |
| 16.000Btu (mean) | 4036.3cal15 |
| 17.000Btu (mean) | 4288.6cal15 |
| 18.000Btu (mean) | 4540.8cal15 |
| 19.000Btu (mean) | 4793.1cal15 |
| Btu (mean) | Calories (15°C,CIPM, 1950) |
|---|---|
| 20.000Btu (mean) | 5045.4cal15 |
| 21.000Btu (mean) | 5297.6cal15 |
| 22.000Btu (mean) | 5549.9cal15 |
| 23.000Btu (mean) | 5802.2cal15 |
| 24.000Btu (mean) | 6054.4cal15 |
| 25.000Btu (mean) | 6306.7cal15 |
| 26.000Btu (mean) | 6559.0cal15 |
| 27.000Btu (mean) | 6811.3cal15 |
| 28.000Btu (mean) | 7063.5cal15 |
| 29.000Btu (mean) | 7315.8cal15 |
| 30.000Btu (mean) | 7568.1cal15 |
| 31.000Btu (mean) | 7820.3cal15 |
| 32.000Btu (mean) | 8072.6cal15 |
| 33.000Btu (mean) | 8324.9cal15 |
| 34.000Btu (mean) | 8577.1cal15 |
| 35.000Btu (mean) | 8829.4cal15 |
| 36.000Btu (mean) | 9081.7cal15 |
| 37.000Btu (mean) | 9333.9cal15 |
| 38.000Btu (mean) | 9586.2cal15 |
| 39.000Btu (mean) | 9838.5cal15 |
| Btu (mean) | Calories (15°C,CIPM, 1950) |
|---|---|
| 40.000Btu (mean) | 10091cal15 |
| 41.000Btu (mean) | 10343cal15 |
| 42.000Btu (mean) | 10595cal15 |
| 43.000Btu (mean) | 10848cal15 |
| 44.000Btu (mean) | 11100cal15 |
| 45.000Btu (mean) | 11352cal15 |
| 46.000Btu (mean) | 11604cal15 |
| 47.000Btu (mean) | 11857cal15 |
| 48.000Btu (mean) | 12109cal15 |
| 49.000Btu (mean) | 12361cal15 |
| 50.000Btu (mean) | 12613cal15 |
| 51.000Btu (mean) | 12866cal15 |
| 52.000Btu (mean) | 13118cal15 |
| 53.000Btu (mean) | 13370cal15 |
| 54.000Btu (mean) | 13623cal15 |
| 55.000Btu (mean) | 13875cal15 |
| 56.000Btu (mean) | 14127cal15 |
| 57.000Btu (mean) | 14379cal15 |
| 58.000Btu (mean) | 14632cal15 |
| 59.000Btu (mean) | 14884cal15 |
| 60.000Btu (mean) | 15136cal15 |
| 61.000Btu (mean) | 15388cal15 |
| 62.000Btu (mean) | 15641cal15 |
| 63.000Btu (mean) | 15893cal15 |
| 64.000Btu (mean) | 16145cal15 |
| 65.000Btu (mean) | 16397cal15 |
| 66.000Btu (mean) | 16650cal15 |
| 67.000Btu (mean) | 16902cal15 |
| 68.000Btu (mean) | 17154cal15 |
| 69.000Btu (mean) | 17407cal15 |
| 70.000Btu (mean) | 17659cal15 |
| 71.000Btu (mean) | 17911cal15 |
| 72.000Btu (mean) | 18163cal15 |
| 73.000Btu (mean) | 18416cal15 |
| 74.000Btu (mean) | 18668cal15 |
| 75.000Btu (mean) | 18920cal15 |
| 76.000Btu (mean) | 19172cal15 |
| 77.000Btu (mean) | 19425cal15 |
| 78.000Btu (mean) | 19677cal15 |
| 79.000Btu (mean) | 19929cal15 |