Floor Area Calculator

Calculate floor area from length and width. Estimate square footage for one floor section or multiple sections, subtract excluded areas, add waste, and estimate flooring boxes, rolls, underlayment, baseboards, material cost, labor cost, and total project cost.

Calculate Floor Area

Floor Area = Length × Width. Floor Perimeter = 2 × (Length + Width).
Your result will appear here.

How the floor area calculator works

Single section mode:
The calculator multiplies floor length by floor width to find the square footage.

Multiple sections mode:
The calculator multiplies the area of one same-size floor section by the number of sections.

Known area mode:
The calculator converts a known floor area into square feet, square yards, square meters, and material quantities.

Project estimate:
The calculator subtracts excluded areas, adds waste, estimates flooring units, underlayment units, baseboards, material cost, labor cost, and total cost.

Why use a floor area calculator?

A floor area calculator helps estimate square footage for flooring, hardwood, laminate, vinyl plank, carpet, tile, underlayment, baseboards, concrete coating, and remodeling projects.

It can help calculate floor area, floor perimeter, square yards, square meters, material units, underlayment units, waste, baseboard cost, material cost, labor cost, and estimated total project cost.

What your result means

Your result shows net floor area, area with waste, floor perimeter, square yards, square meters, flooring units, underlayment units, material cost, underlayment cost, baseboard cost, labor cost, and estimated total cost.

Floor area formulas

Frequently asked questions

How do I calculate floor area?

Measure the floor length and width, then multiply them together. For example, a 12 ft by 10 ft floor is 120 square feet.

How do I calculate floor square footage for flooring?

Calculate the floor area, subtract excluded areas, then add waste for cuts, trimming, damaged pieces, and layout. Many flooring jobs use 5% to 15% extra.

How do I calculate flooring boxes?

Divide the floor area with waste by the square feet covered per box, then round up to the next whole box.

Should I subtract cabinets or islands from floor area?

If the flooring will not go underneath them, you can subtract those excluded areas. If flooring will run under them, leave them included.

Is this floor area calculator exact?

It is exact for the measurements entered, but real project estimates can vary by irregular room shapes, closets, alcoves, built-ins, floor pattern, waste, and installation method.