How to use this tool
Enter the length and width of one flat rectangle and choose feet, inches or metres for both measurements. The calculator multiplies the converted dimensions for area and adds them for perimeter. It does not include openings, irregular outlines, sloped surfaces, packaging sizes or material waste.
Try these values
A 12-foot by 10-foot rectangle covers 120 square feet, or 11.1483648 square metres. Its perimeter is 44 feet.
Common questions
How do I measure an L-shaped room?
Split it into non-overlapping rectangles, calculate each one and add their areas.
Does this tell me how much material to order?
No. Check product coverage, cuts, waste and the actual measured surface separately.
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