Kilocalories to British Thermal Units (kcal → BTU)
Formula
1 kcal = 3.9656512425833603 BTUConversion Table
| kcal | BTU |
|---|---|
| 0 | 0 |
| 1.0000 | 3.9657 |
| 2.0000 | 7.9313 |
| 3.0000 | 11.897 |
| 4.0000 | 15.863 |
| 5.0000 | 19.828 |
| 6.0000 | 23.794 |
| 7.0000 | 27.760 |
| 8.0000 | 31.725 |
| 9.0000 | 35.691 |
| 10.000 | 39.657 |
| 11.000 | 43.622 |
| 12.000 | 47.588 |
| 13.000 | 51.553 |
| 14.000 | 55.519 |
| 15.000 | 59.485 |
| 16.000 | 63.450 |
| 17.000 | 67.416 |
| 18.000 | 71.382 |
| 19.000 | 75.347 |
| kcal | BTU |
|---|---|
| 20.000 | 79.313 |
| 21.000 | 83.279 |
| 22.000 | 87.244 |
| 23.000 | 91.210 |
| 24.000 | 95.176 |
| 25.000 | 99.141 |
| 26.000 | 103.11 |
| 27.000 | 107.07 |
| 28.000 | 111.04 |
| 29.000 | 115.00 |
| 30.000 | 118.97 |
| 31.000 | 122.94 |
| 32.000 | 126.90 |
| 33.000 | 130.87 |
| 34.000 | 134.83 |
| 35.000 | 138.80 |
| 36.000 | 142.76 |
| 37.000 | 146.73 |
| 38.000 | 150.69 |
| 39.000 | 154.66 |
| kcal | BTU |
|---|---|
| 40.000 | 158.63 |
| 41.000 | 162.59 |
| 42.000 | 166.56 |
| 43.000 | 170.52 |
| 44.000 | 174.49 |
| 45.000 | 178.45 |
| 46.000 | 182.42 |
| 47.000 | 186.39 |
| 48.000 | 190.35 |
| 49.000 | 194.32 |
| 50.000 | 198.28 |
| 51.000 | 202.25 |
| 52.000 | 206.21 |
| 53.000 | 210.18 |
| 54.000 | 214.15 |
| 55.000 | 218.11 |
| 56.000 | 222.08 |
| 57.000 | 226.04 |
| 58.000 | 230.01 |
| 59.000 | 233.97 |
| kcal | BTU |
|---|---|
| 60.000 | 237.94 |
| 61.000 | 241.90 |
| 62.000 | 245.87 |
| 63.000 | 249.84 |
| 64.000 | 253.80 |
| 65.000 | 257.77 |
| 66.000 | 261.73 |
| 67.000 | 265.70 |
| 68.000 | 269.66 |
| 69.000 | 273.63 |
| 70.000 | 277.60 |
| 71.000 | 281.56 |
| 72.000 | 285.53 |
| 73.000 | 289.49 |
| 74.000 | 293.46 |
| 75.000 | 297.42 |
| 76.000 | 301.39 |
| 77.000 | 305.36 |
| 78.000 | 309.32 |
| 79.000 | 313.29 |
Kilocalories to British Thermal Units Conversion
Converting Kilocalories (kcal) to British Thermal Units (BTU) is a common energy and power conversion. 1 kcal equals 3.965651 BTU. For example, 100 kcal is equal to 396.565124 BTU.
Quick Mental Math: Kilocalories to British Thermal Units
0.2522 kilocalories is 1 British thermal unit, so use that as the mental anchor.
Why is converting Kilocalories to British Thermal Units tricky?
kilocalories to british thermal units mixes thermal units with rate units, so people often miss whether the value is energy or energy per hour.
Quick Reference Values
1 kcal = 3.965651 BTU. 5 kcal = 19.828256 BTU. 10 kcal = 39.656512 BTU. 25 kcal = 99.141281 BTU. 50 kcal = 198.282562 BTU. 100 kcal = 396.565124 BTU.
What is Kilocalories?
Kilocalories (kcal) is a unit of energy and power. A kilocalorie equals exactly 1,000 calories and represents the amount of energy needed to raise the temperature of 1 kilogram of water by 1 degree Celsius. It is widely used to quantify food energy and is equivalent to 4,184 joules [bipm-si-brochure]. The calorie was introduced in the early 19th century by Nicolas Clément as a unit of heat energy. The kilocalorie became standard in nutrition science by the early 20th century to express food energy content [bipm-si-brochure]. Kilocalories are used globally in nutrition labeling, especially in the US and Europe, to indicate energy content of foods. Scientific contexts often prefer joules, but kcal remains prevalent in dietetics [nist-sp-811].
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].
Common Misspellings
People often search for this conversion using these alternate spellings: kilo calories, kcalorie, kilo-calories, british thermal unit, btu unit, british therm unit, btu energy, british thermals unit. All of these refer to the Kilocalories to British Thermal Units conversion.