Room Area Calculator
Calculate area per room and total area for equal rectangular rooms.
Enter length, width, and count
Choose metres or feet first. Measure the internal length and width of one rectangular room, then enter how many equal rooms to add. Existing dimensions are converted when you switch unit systems.
Area per room and total area
A room measuring 5 m by 4 m has an area of 20 m². Three equal rooms total 60 m². The result also shows total area in the other area unit.
Alcoves and exclusions
Measure rectangular alcoves as additional sections and add them. Calculate columns, shafts, or other excluded sections separately and subtract them from total area.
Irregular rooms
Split L-shaped and other plans into rectangles or simple shapes. Calculate each section and add the results. Sloped ceilings and legal floor-area rules are not included; use the appropriate local measurement method for those.