1 BTU = 251.9968 Calories See Link http://www.convert-me.com/en/convert/units/energy/energy.btu.en.html It appears that there are two types of Calories. See this link: http://www.csgnetwork.com/converttable.html
4800 BTUs will 150 square feet.
1 BTU is the energy required to heat 1 pound of water by 1 degree F. 1 Joule is defined mechanically, but in thermal terms it is 1/4.2 of a calorie (4.2 Joules/calorie), and 1 calorie is the energy required to heat 1 gram of water by 1 degree C. In fact 1 BTU = 1055 Joules.
A small room is about 5,000 BTUs. Most people don't have a room that would require more than 10,000 BTUs.
90,000 BTUs - the 090 is what tells you the BTUs of the unit.
5,000
There are approximately 6,700-8,300 BTUs per pound of lignite coal. A ton of lignite coal contains 20-24 million BTUs.
1 kilowatt is equal to 3,412 BTUs (British Thermal Units).
6,520 Btus
To convert BTUs to tons, you can use the conversion factor that 1 ton of cooling is equivalent to 12,000 BTUs per hour. Therefore, to find out how many tons 15,000 BTUs represents, you divide 15,000 by 12,000. This calculation shows that 15,000 BTUs is approximately 1.25 tons.
To convert BTUs to horsepower, you can use the conversion factor that 1 horsepower is approximately equal to 2,545 BTUs per hour. Therefore, for 18,000 BTUs, the calculation would be 18,000 BTUs ÷ 2,545 BTUs/hp, which equals about 7.07 horsepower. So, you would need approximately 7.1 hp to provide 18,000 BTUs of cooling or heating.
The answer depends on the city. Somewhere like Colombo (Sri Lanka) will probably require 0 btus.
1 therm of gas is equal to 100,000 BTUs (British Thermal Units).