Last Updated: April 12, 2026

Square Footage Calculator

Calculate area for one or multiple rooms. Optionally estimate material cost.

Results

Total Area
Total (sq ft)
Total (sq m)

How to Measure Square Footage

  1. Measure the length and width of the room in feet (or meters).
  2. Multiply length × width to get the area.
  3. For L-shaped or irregular rooms, break into rectangles, calculate each, and add.
  4. Add 10% extra for material waste when ordering flooring.

Conversion Reference

FromToMultiply by
sq ftsq m0.0929
sq msq ft10.764
sq ftsq in144
acressq ft43,560

Frequently Asked Questions

How do you calculate square footage?

Multiply length × width. A 12×10 room = 120 sq ft.

How many sq ft is a 12×12 room?

144 square feet.

How to convert sq ft to sq m?

Multiply by 0.0929. 500 sq ft = 46.45 sq m.

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