BTU Calculator

The last thing you want after spending time and money having a beatuiful new bathroom is for it to be too cold, or even too hot. Radiators give out different amount of heat, measured in 'BTU's' (British Thermal Units). Sometimes smaller radiators with more surface area will give off more heat than larger ones, so it makes sense to find out what your bathroom needs and speak to us in-store to ensure you get a suitable radiator or towel warmer.

Use this calculator to estimate the amount of BTU's your bathroom needs to be sufficiently heated.

Please note: The Bathroom Store cannot be held responsible for use of this calculator and its results. The BTU calculator is provided as a courtesy only.

Room Details Name of Room : Type of Room : Bathroom Living Room Bedroom Hallway or Kitchen What is below the Room? : Heated Room Wooden Floor Solid concrete Floor Suspended Concrete Floor What is above the Room? : Heated Room A Pitched Roof Pitched Roof Insulated 50mm Pitched Roof Insulated 100mm Flat Roof Flat Roof Insulated Type of Outside Walls : Brick Cavity Insulated Brick Cavity 105mm Solid Brick 220mm Solid Brick Wood frame Type of Windows : None Wood/Plastic Double Glazed Metal Double Glazed Metal Single Glazed Wood Single Glazed Number of Outside Walls : None One Two Three Height of Room (m) : Width of Room (m) : Length of Room (m) : Window Area (m²) : Watts Required : BTU's Required : House Summary (Below you will see the outputs you will require!)