Room Area Calculator
Find room area instantly in square feet.
How to Use the Room Area Calculator
Enter the room length and width to calculate floor area for flooring, paint planning, furniture layout or renovation estimates.
Practical Example
A room measuring 16 feet by 13 feet covers 208 square feet.
Factors That Affect the Result
Closets, alcoves, columns, bay windows and irregular room shapes can change the usable floor area.
Frequently Asked Questions
Can I calculate an L-shaped room?
Yes. Split it into rectangles and add the areas.
Should I include closets?
Include them if the same flooring or finish will be used there.
Can I use decimal dimensions?
Yes, decimals improve accuracy for partial feet.
Related Tools
Measuring Room Area
Room area is normally calculated from the floor footprint. Rectangular spaces use length × width, while L-shaped or irregular rooms should be divided into smaller sections and added together.
Use actual finished-wall dimensions and keep all measurements in the same unit. Flooring, paint and heating calculations may require different surface areas, so do not use floor area automatically for every project. When ordering flooring, allow for cuts, pattern direction and waste beyond the ideal measured area.