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Calculate the area of any space in square feet and square meters.
Break the room into rectangles, calculate each, and add them together.
1 square meter = 10.764 square feet. Multiply sq m by 10.764 to get sq ft.
Measure the radius (half the diameter), square it, and multiply by π (3.14159). For example, a circular room with a 10-foot radius has an area of about 314 square feet (10 × 10 × 3.14159).
The average US single-family home is about 2,400 square feet as of 2025. However, sizes vary significantly by region, with homes in the South and Midwest generally being larger than those in the Northeast.