Calculate square feet from length and width, multiple areas, or known area conversions. Estimate square yards, square meters, acres, material quantity, waste, and project cost.
Length and width mode:
The calculator multiplies length by width and converts the result into square feet.
Multiple areas mode:
The calculator multiplies one area by the number of same-size areas.
Known area mode:
The calculator converts your known area into square feet, square yards, square meters, acres, and more.
Circular area mode:
The calculator uses diameter to estimate circular square footage and perimeter.
A square feet calculator helps estimate area for rooms, floors, walls, ceilings, yards, patios, garages, decks, roofs, concrete slabs, paint, tile, carpet, and other projects.
It can help calculate square feet, square yards, square meters, acres, perimeter, material quantity, waste, material cost, labor cost, and estimated total project cost.
Your result shows net square footage, square footage with waste, square yards, square meters, acres, perimeter, material units, material cost, labor cost, and estimated total cost based on your inputs.
Multiply length by width. For example, a 12 foot by 10 foot room has 120 square feet.
One square yard equals 9 square feet.
One acre equals 43,560 square feet.
Many projects use 5% to 15% extra for waste, cuts, overlap, mistakes, and irregular shapes. Some materials may need more.
No. It is an estimate. Actual square footage and material needs can vary by shape, cuts, obstacles, openings, slopes, overlap, material size, waste, and installation method.