Area of a 18 Inch Circle 1,017.9 square inches 7.0686 square feet 0.65669 square meters 6,566.9 square centimeters Click to see full answer. Similarly, how many square feet is a 18 foot circle?Multiply the radius by itself to square the number (6 x 6 = 36). Multiply the result by pi (use the button on the calculator) or 3.14159 (36 x 3.14159 = 113.1). The result is the area of the circle in square feet–113.1 square feet.Also, how many square feet are in a 16 foot circle? Area of a 16 Foot Circle 804.25 square feet 115,812 square inches 74.717 square meters 747,171 square centimeters In this regard, how do I figure square feet of a circle? Calculating square footage for a circular area Measure the diameter of your circle in feet. To calculate the area of a circle we use the formula: π x (diameter/2)2. That is to say π (pi is 3.14159265) multiplied by half the diameter squared. This gives you your square feet figure (ft2). How many square feet are in a 27 foot circle? Area of a 27 Foot Circle 2,290.2 square feet 329,792 square inches 212.77 square meters 2,127,685 square centimeters

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