Enter length and width in feet for a single space, add multiple rooms, and get combined totals with metric conversion.
Single Rectangle
Area—
Multiple Rooms
100 sq ft
Rooms subtotal—
Unit Converter
Square meters—
Practical tips & common mistakes
Measure twice
For flooring and paint, add 5–10% waste to rectangle estimates — cuts, pattern match, and odd corners eat material.
Mixing units
Converting sq ft to sq m with 0.092903 is correct; using 0.09 or 10.76 in the wrong direction doubles ordering errors.
Odd-shaped rooms
Break L-shaped spaces into rectangles, sum the areas, and note that baseboard and trim follow perimeter — not area.
Real estate listings
Listed square footage may include garages or unfinished space depending on local MLS rules. Verify before comparing $/sq ft.