Square Footage Calculator
Enter a room or area's length and width to calculate its square footage.
Last updated: September 25, 2026
Frequently asked questions
How do I calculate square footage?
Multiply length by width, both measured in feet - a 12×15 foot room is 12 × 15 = 180 square feet.
How do I calculate square footage for an L-shaped room?
Split the room into two or more rectangles, calculate the square footage of each separately, then add them together for the total.
How do I convert square meters to square feet?
Multiply square meters by about 10.764, or equivalently, convert each side to feet first (1 meter ≈ 3.28 feet) before multiplying length × width.
Why does flooring or paint calculation need extra square footage beyond the exact room size?
This calculator gives the exact area - most contractors and DIY guides recommend adding 10% or more on top of that for cuts, waste, pattern matching, and future repairs, which isn't included in a simple length × width calculation.
How do I calculate square footage for a room measured in meters?
A 4×5 meter room converts to about 13.12×16.40 ft, giving roughly 215.3 sq ft - the same as multiplying 20 sq meters by 10.764. Select 'Meters' as the unit and the calculator handles the conversion for you.
Does this calculate floor area or wall area?
This calculates flat floor or ceiling area (length × width). For wall area, such as for paint or drywall, you need perimeter × height instead, which is a different formula this specific tool doesn't perform - use the drywall or paint calculator's own wall-area fields for that.
How does square footage relate to square yardage?
One square yard equals 9 square feet, so divide your square footage result by 9 to get square yards - useful since carpet and sod are often priced per square yard rather than per square foot.