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Common Measurements
100 sq ft
10' × 10' room
1,000 sq ft
Average apartment room
43,560 sq ft
1 acre
Formulas
L × WRectangle
π × r²Circle
½ × b × hTriangle
Calculate square footage for rectangles, circles, and triangles. Convert to square meters or acres.
10' × 10' room
Average apartment room
1 acre
L × WRectangle
π × r²Circle
½ × b × hTriangle