BTU Calculator
The following calculator can be used to estimate the amount of BTU (British thermal unit) needed for the heating or cooling of your house/room based on the size and the temperature change you want to achieve.
Please note that this calculator can only give out a rough estimation based on experience. You should also consider factors like efficiency decrease of the heater or air conditioner with time, the shape/type of your house/room, insulation conditions, etc. 1 watt is approximately 3.41214 BTU/h.
