Radiator BTU Calculator

Calculate Your Room’s BTU Requirement Please Note: This is just a guide for reference only Larger rooms, such as living rooms may require more than one radiator positioned throughout the room. If this applies to you, divide the required output between the number of radiators required.

This BTU Calculator produces results for Delta T 50°

Measurement Type
Room Dimensions
Select Room
Window Type (WT)
Room Exposure (RE)
What's the BTU?

Your BTU is: -

This is shown as a range to take into account for variables such as external temperature and insulation levels in the home. We advise that the combined heat output of all the radiators in a room meets the higher end to ensure that the room is heated evenly and efficiently.