Radiator Calculator

Radiator Calculator is a must-have tool for plumbers, builders, and DIYers. It quickly determines the ideal radiator count and size for any room, using room type, dimensions (feet or meters), glazed area, glazing type, external walls, and wall details. Rooms can be edited, saved, and specifications emailed to clients or yourself.

Each room profile supports below/above room types, enabling precise heating design. Save multiple rooms for a full home project, and share results instantly to streamline quoting and planning.