Square Footage Calculator
Find the area of a room, floor, or yard in square feet and square meters. Choose the shape, enter the measurements, and add a price per square foot if you want a cost estimate.
Area
180 sq ft
Check the highlighted fields to see your result.
- Square meters
- 16.72 m²
- Total cost
- —
Results are estimates for information only and do not constitute financial, medical, or legal advice.
How square footage works
Square footage is the area of a flat surface measured in squares that are one foot on each side. For a rectangle, multiply the length by the width. If you measure in inches, yards, or meters, the calculator converts the result for you.
The formulas
- Rectangle: length × width
- Circle: π × radius²
- Triangle: base × height ÷ 2
- 1 square meter ≈ 10.764 square feet
Worked example
A bedroom is 12 ft by 15 ft, and the flooring you like costs $3.50 per square foot.
- Area: 12 × 15 = 180 sq ft, or about 16.72 m².
- Cost: 180 × $3.50 = $630, before extra for waste.
Frequently asked questions
How do I measure an L-shaped room?
Split it into two rectangles, find the area of each, and add them up. For example, a 12 × 15 ft main area plus a 6 × 8 ft nook is 180 + 48 = 228 sq ft.
How many square feet are in a square meter?
About 10.764. A square foot is about 0.0929 square meters, since one foot is exactly 0.3048 meters.
Should I buy extra flooring?
Yes. Flooring installers usually add 5% to 10% for cuts and mistakes, and more for diagonal patterns. Multiply the area by 1.10 for a 10% allowance.