Radiator calculator has been written to allow a quick and easy method to determine the radiator size/sizes needed in a normal domestic environment. There are many different methods to calculate this requirement, ours is one born out of experience but may not suit everyone.

No warranty is offered or implied as to the accuracy of this calculator and it should be considered as a guide only.

Please select from the options below as closely as possible to your room conditions, we have included as many variables as possible, plus an option to allow your preferred heating 'comfort type'.