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- 1). Determine the shape of your pond. Ponds can be square, rectangular, circular or irregular in shape.
- 2). Use a tape measure to determine the length and width of a square or rectangular pond. Write down both measurements. Multiply both numbers with a calculator to get the square footage.
- 3). Use a tape measure to determine the diameter of a circular pond. The diameter is the distance from one side of the pond to the other side of the pond through the center. Divide this measurement by two to determine the radius. On a calculator, multiply the radius by Pi (3.14) to get the square footage.
- 4). Use a tape measure to determine multiple, equally-spaced width measurements across the pond from one side to the other for an irregular-shaped pond. Add the width measurements together and divide by the number of individual width measurements to determine the average pond width. Take multiple, equally-spaced length measurements. Add all length measurements together and divide by the number of individual length measurements. Multiply the pond's average width and length to determine the square footage.
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