Determine the radius of the circle. So, if the diameter is 12 feet, the radius is 6 feet. Calculating square footage depends on the shape you have. The Square Footage Calculator estimates the square footage of a lot, house, or other surfaces in several common shapes. which, by the way, will always be 3.14159. . All you need is a calculator, a circle to measure and a tool with which to measure, such as a ruler. It is a math problem based on the area of a circle. So, the formula for area of a circle is; Area = Pi x R^2. Driveway Coverage EXAMPLE 1 Standard Driveway to be covered with Stone 6" Deep . Many calculators include the constant pi on one key, eliminating the need to remember it. The formula for the area of a circle is the radius squared multiplied by the constant pi, or 3.14159. These shapes are defined by the opposite sides being straight, parallel, and of equal length. The hexagon shape is one of the most popular shapes in nature, from honeycomb patterns to hexagon tiles for mirrors - its uses are almost endless.Here we do not only explain why the 6-sided polygon is so popular, but also how to correctly draw hexagon sides. The area of all 3 shapes is found … So, if the diameter is 12 feet, the radius is 6 feet. The result is the area of the circle in square feet. It will also show the perimeter of the shape. Circle calculator, formula, work with steps, step by step calculation, real world and practice problems to learn how to find the area, circumference & diameter of a circle … Knowing the square footage of the driveway is the first step in knowing how many bricks will be needed to pave it. The Area of anything is always in square units, no matter what the unit of measure is. So your radius measurement of 9 inches equals .75 feet. So, to find the area of a circle in square feet, follow these steps: 1. Disclaimer. The Area of anything is always in square units, no matter what the unit of measure is. For instance if your radius measures 9 inches, you convert from inches to feet by dividing the radius by 12 because there are 12 inches in a foot. Whilst every effort has been made in building this square footage calculator, we are not to be held liable for any special, incidental, indirect or consequential damages or monetary losses of any kind arising out of or in connection with the use of the converter tools and … Area of a circle is pi*radius^2. Square footage for a circle sq. Square Footage of Rectangular Shapes. (Or, equivalently, measure the diameter and divide by two.) So, if the diameter is 12 feet, the radius is 6 feet. R is 1/2 the diameter. My circle is 30 feet accross (15 feet from center to the edge) and I am trying to determine the total square footage of this circle. The area A of a circle of radius r is given by [math]A=\pi r^2[/math]. (Or, equivalently, measure the diameter and divide by two.) Square Footage Inside of a Circle: Length x Width x .7854 = Square Feet Length Around a Circle: Diameter x 3.1416 = Linear Feet Around a Circle General Quantity Formulas: ... How to Calculate Your Square Footage? This tool is useful for finding the approximate acreage or a tract of land, the square footage of a roof, or any other instance where you need a good estimate of the area of something. Its mathematically accurate and useful for Construction projects, wood workers, home owners, students, and real estate. So, the formula for area of a circle is; Area = Pi x R^2. Multiply the result of step 2 by π, which is approximately 3.14159265. Use a ruler or similar tool to measure the radius of the circle. It is important to use the "Length A", the long measurement in the box with the Length A label. Square the radius measured in step 1. to 5 decimal places. Since you want to have an answer in square feet, you need to use feet as your basic unit for measurement. ft. This is the length of the line from the middle of the circle to any point on its edge. radius is hald of the diameter of a circle, so 10.5 ft. so R squared is 110.25, times pi=3.4159... gives 346.36 sq ft. R is 1/2 the diameter. 20' x 30' = 600 Square Feet How to calculate square footage? 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