| Did you mean to convert | calorie [15 °C] calorie [I.T.] calorie [nutritional] calorie [thermochemical] |
to | British thermal unit Btu [thermochemical] |
How many calories in 1 Btu? The answer is 252.05597496297. We assume you are converting between calorie [15 °C] and British thermal unit. You can view more details on each measurement unit: calories or Btu The SI derived unit for energy is the joule. 1 joule is equal to 0.23890295761862 calories, or 0.00094781707774915 Btu. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between calories and Btus. Type in your own numbers in the form to convert the units!
1 calories to Btu = 0.00397 Btu
10 calories to Btu = 0.03967 Btu
50 calories to Btu = 0.19837 Btu
100 calories to Btu = 0.39674 Btu
200 calories to Btu = 0.79347 Btu
500 calories to Btu = 1.98369 Btu
1000 calories to Btu = 3.96737 Btu
You can do the reverse unit conversion from Btu to calories, or enter any two units below:
15 °C calorie: the amount of energy required to warm 1 g of air-free water from 14.5 °C to 15.5 °C at a constant pressure of 101.325 kPa (1 atm). Experimental values of this calorie ranged from 4.1852 J to 4.1858 J. The CIPM in 1950 published a mean experimental value of 4.1855 J, noting an uncertainty of 0.0005 J.
The British thermal unit (BTU or Btu) is a non-metric unit of energy, used in the United States and, to a lesser extent, the UK (where it isgenerally only used for heating systems). The SI unit is the joule (J), which is used by most other countries.
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