This tool is used to calculate BTU (British Thermal Unit) requirements for room air conditioners.
It is important to choose a properly sized air conditioner for your room. A bigger air conditioner is not necessarily better because an AC unit much bigger than required will cycle on and off too frequently, reducing efficiency and the ability to control humidity inside the home. To figure out which size unit is best for your cooling needs, you can use this calculator to estimate how many BTUs you need to cool your room.