British Thermal Units to Kilojoules (BTU → kJ)
Formula
1 BTU = 1.0550599999999999 kJConversion Table
| BTU | kJ |
|---|---|
| 0 | 0 |
| 1.0000 | 1.0551 |
| 2.0000 | 2.1101 |
| 3.0000 | 3.1652 |
| 4.0000 | 4.2202 |
| 5.0000 | 5.2753 |
| 6.0000 | 6.3304 |
| 7.0000 | 7.3854 |
| 8.0000 | 8.4405 |
| 9.0000 | 9.4955 |
| 10.000 | 10.551 |
| 11.000 | 11.606 |
| 12.000 | 12.661 |
| 13.000 | 13.716 |
| 14.000 | 14.771 |
| 15.000 | 15.826 |
| 16.000 | 16.881 |
| 17.000 | 17.936 |
| 18.000 | 18.991 |
| 19.000 | 20.046 |
| BTU | kJ |
|---|---|
| 20.000 | 21.101 |
| 21.000 | 22.156 |
| 22.000 | 23.211 |
| 23.000 | 24.266 |
| 24.000 | 25.321 |
| 25.000 | 26.377 |
| 26.000 | 27.432 |
| 27.000 | 28.487 |
| 28.000 | 29.542 |
| 29.000 | 30.597 |
| 30.000 | 31.652 |
| 31.000 | 32.707 |
| 32.000 | 33.762 |
| 33.000 | 34.817 |
| 34.000 | 35.872 |
| 35.000 | 36.927 |
| 36.000 | 37.982 |
| 37.000 | 39.037 |
| 38.000 | 40.092 |
| 39.000 | 41.147 |
| BTU | kJ |
|---|---|
| 40.000 | 42.202 |
| 41.000 | 43.257 |
| 42.000 | 44.313 |
| 43.000 | 45.368 |
| 44.000 | 46.423 |
| 45.000 | 47.478 |
| 46.000 | 48.533 |
| 47.000 | 49.588 |
| 48.000 | 50.643 |
| 49.000 | 51.698 |
| 50.000 | 52.753 |
| 51.000 | 53.808 |
| 52.000 | 54.863 |
| 53.000 | 55.918 |
| 54.000 | 56.973 |
| 55.000 | 58.028 |
| 56.000 | 59.083 |
| 57.000 | 60.138 |
| 58.000 | 61.193 |
| 59.000 | 62.249 |
| BTU | kJ |
|---|---|
| 60.000 | 63.304 |
| 61.000 | 64.359 |
| 62.000 | 65.414 |
| 63.000 | 66.469 |
| 64.000 | 67.524 |
| 65.000 | 68.579 |
| 66.000 | 69.634 |
| 67.000 | 70.689 |
| 68.000 | 71.744 |
| 69.000 | 72.799 |
| 70.000 | 73.854 |
| 71.000 | 74.909 |
| 72.000 | 75.964 |
| 73.000 | 77.019 |
| 74.000 | 78.074 |
| 75.000 | 79.129 |
| 76.000 | 80.185 |
| 77.000 | 81.240 |
| 78.000 | 82.295 |
| 79.000 | 83.350 |
British Thermal Units to Kilojoules Conversion
Converting British Thermal Units (BTU) to Kilojoules (kJ) is a common energy and power conversion. 1 BTU equals 1.05506 kJ. For example, 100 BTU is equal to 105.506 kJ.
Quick Mental Math: British Thermal Units to Kilojoules
0.9478 british thermal units is 1 kilojoule, so use that as the mental anchor.
Why is converting British Thermal Units to Kilojoules tricky?
british thermal units to kilojoules mixes thermal units with rate units, so people often miss whether the value is energy or energy per hour.
Quick Reference Values
1 BTU = 1.05506 kJ. 5 BTU = 5.2753 kJ. 10 BTU = 10.5506 kJ. 25 BTU = 26.3765 kJ. 50 BTU = 52.753 kJ. 100 BTU = 105.506 kJ.
What is British Thermal Units?
British Thermal Units (BTU) is a unit of energy and power. The British Thermal Unit (BTU) measures energy and is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. One BTU equals approximately 1055.06 joules in the International System of Units (SI). This unit is standardized for heating and cooling system capacities and energy content calculations [nist-sp-811]. The BTU originated in the mid-19th century during the industrial revolution to quantify heat energy for steam engines and heating systems. It was standardized by engineering societies to unify thermal energy measurements in the United Kingdom and the United States [nist-sp-811]. BTU remains widely used in the United States, the United Kingdom, and Canada for HVAC system ratings and energy content in fuels. It is recognized by industry standards and energy regulations but is less common in countries using the SI system exclusively [nist-sp-811].
What is Kilojoules?
Kilojoules (kJ) is a unit of energy and power. A kilojoule is a unit of energy equal to 1,000 joules. It quantifies work, heat, or energy transfer in the metric system, with one joule defined as one newton meter. Kilojoules are widely applied in physics, chemistry, and nutrition to measure energy content or expenditure [iso-80000]. The joule unit was named after James Prescott Joule in the late 19th century, reflecting mechanical equivalent of heat measurements. The kilojoule, as a multiple, became common with SI adoption to express larger energy quantities clearly and is standardized by ISO and BIPM [bipm-si-brochure]. Kilojoules are standard in scientific disciplines globally for energy quantification. Nutrition labels in many countries use kilojoules to indicate food energy content, while engineering and physics consistently apply kJ for energy calculations [nist-si-guide].
Common Misspellings
People often search for this conversion using these alternate spellings: british thermal unit, btu unit, british therm unit, btu energy, british thermals unit, kilojoule, kilo joules, kilojouls, kilojoules energy, kj. All of these refer to the British Thermal Units to Kilojoules conversion.