Square ft of circle calculator

* Radius ( R ) Enter Radius Radius must be greater than Zero (0) !!! Unit. m, cm, in, ft, yd ... Square Area Calculator · Square Bar Area Calculator · Trapezoidal ...

Area of an octagon formula. The formula for the area of an octagon of regular shape is 2 · (1 + √2) · side2, as seen in the figure below: The solution to the equation is straightforward and this is the formula used in our regular octagon area calculator. The result will be in whatever metric you did the measurement in, but squared: square ...Sep 10, 2010 · For example, assume the diameter of the circular area to be 12 feet. Divide the length of the diameter by 2 to find the radius (12 / 2 = 6). The radius is 6 feet. 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). Area of a circle in terms of circumference: Area = C2 4π = 103.72 4π = 10753.69(4·3.14) = 10753.6912.56 = 855.3 square feet (*) (*) 855.29859993982 feet, exactly or limited to the precision of this calculator (13 decimal places). Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.A circle of radius = 1 or diameter = 2 or circumference = 6.283 meters has an area of: 0 square kilometers (km²) 0 square meters (m²) 0 square centimeters (cm²) 0 square millimeters (mm²) 0 square miles (mi²) 0 square yards (yd²) 0 square feet (ft²) 0 square inches (in²) What is the area of a circle with a DIAMETER of 500 feet (radius of 250 feet)? How big is a 500 foot circle? Use this easy and mobile-friendly calculator to compute the area of a circle given its diameter.To calculate the square footage of a rectangle or square, get the length and width of the area in feet and multiply the values. area = length * width. To get the square footage of a circle, multiply Pi (3.1415) by half the diameter raised to the power of 2. area = 3.1415 * (diameter / 2) ** 2. The above formulas are easy enough to use with a ...The radius is also half of the value of the diameter. Our round hole volume calculator uses the following equation to calculate the hole volume: \footnotesize \rm {volume}= \pi \times \rm {radius}^ {2} \times \rm {depth} volume = π × radius2 × depth. As you can see, this hole volume formula for a circular hole is the same equation used to ...Area of a circle in terms of circumference: Area = C2 4π = 439.82 4π = 193424.04(4·3.14) = 193424.0412.56 = 15390 square feet (*) (*) 15393.80400259 feet, exactly or limited to the precision of this calculator (13 decimal places). Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.

5027 square feet (ft²) 723888 square inches (in²) Use the this circle area calculator below to find the area of a circle given its diameter, or other parameters. To calculate the area, you just need to enter a positive numeric value in one of the 3 fields of the calculator. You can also see at the bottom of the calculator, the step-by-step ...Surface Area of a Pipe. Area=2ΠrL. Enter 2 values to get the third. Radius (r) Length (L) Surface area. For help with using this calculator, see the object surface area help page.How to find the shaded region as illustrated by a circle inscribed in a square. The circle inside a square problem can be solved by first finding the area of...The circumference - the length of the outside boundaries of the circle. To find the area from the radius, it's very easy. a=\pi r^2 a = πr2. Diameter is just 2x radius, so to get the circle's area from the diameter: a=\pi (d/2)^2 a = π(d/2)2. And to find area from circumference, it's easiest to first conve. r=c/2\pi \\ a = \pi r^2 r = c/2π ...Click on "Convert to Decimal" to calculate the decimal value. Add your square patio dimensions (or round diameter) to the appropriately labeled area using decimal point values in inches. If you are doing a particular pattern, skip to step 7. Otherwise, measure your patio pavers. You will need the length and width.steel plate weight = steel plate volume × density. steel plate weight = 0.0004 m³ × 7,870 kg/m³. steel plate weight = 3.148 kilograms. However, since we need five pieces of this square steel plate, the steel plates' total weight would then be 3.148 kg × 5 = 15.74 kilograms. That's a lot of weight for just a small piece of cube mold!Step Two: Multiply the length and width to find the area in square inches. Step Three: Multiply the area by the gravel depth in inches to find the volume in cubic inches - traditional pavers are generally set on a 4″ - 6″ compacted gravel base. Step Four: Divide cubic inches by 46,656 to find the amount of gravel in cubic yards.This tool will calculate the area of a rectangle from the dimensions of length and width, A=LW. ... Circle diameter to area calculator; Length and distance converter; Calculate volume capacity from length, width and height; Contents ... square foot (sq ft) - 0.09290304 m² ...

Area of Half Circle Calculator "Our mission is to provide the construction industry with a tool to save time and money through simplicity when dealing with complex formulas and calculations in the field." ... Area Sq.Ft. Area Sq.Yds. Area in Acres: Area of Half Circle Measurements Needed.What is the area of a circle with a DIAMETER of 12 feet (radius of 6 feet)? How big is a 12 foot circle? Use this easy and mobile-friendly calculator to compute the area of a circle given its diameter.Let a = area of the circle. a = πr². If you know the diameter and not the radius, simply divide the diameter by 2 to get the radius and still use the formula above. Again, the formula can be used to solve for the radius, if you know the area. Simply divide a by π to get r² and take the square root of. the result.The procedure is reversed to calculate the area of a circle from its diameter. Starting with a diameter of 150 meters: Divide the diameter by 2 to get the radius (Example: 150/2 = 75) Square the radius (Example: 75 × 75 = 5,625) Multiply the result by Pi to get the area (Example: 5,625 × 3.14159 = approximately 17,671 square meters)SF = πr² = πd²/4 For example, to know how to find the square feet of a circle with a 1524 cm radius, follow these steps: Convert 1524 cm to ft by dividing it by 30.48. …Formulas for Calculating Square Footage. When measuring how many square feet ... 195 ft, 196 ft, 197 ft, 198 ft, 199 ft. Select the radius of your circle. Area of ...

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Substitute the height h into the surface area of a cylinder equation: A = 2πr² + 2πrh. Bring all terms in this equation to one side to get 2πr² + 2πrh - A = 0. Note that this is a quadratic equation in terms of r. Solve this equation using the quadratic formula to obtain. r = (-2πh ± √ (4π²h² + 8πA))/4π.Zillow has 49 photos of this $1,699,900 4 beds, 5 baths, 4,022 Square Feet single family home located at 6114 Hill Cir, Nashville, TN 37209 built in 2022. MLS #2569890.Here we have the area of a semi circle formula as follows: Area_ {semicircle} = π ∗ r 2 2. Area_ {semicircle} = π ∗ 23 2 2. Area_ {semicircle} = 180 ∗ 529 2. Area_ {semicircle} = 95220 2. Area_ {semicircle} = 47610. This free area of a semicircle calculator also goes for finding the same results but saving you a lot of your precious time.Step 1: Clearly mark the dimensions of the figure or shape for which you have to calculate square footage. Step 2: Make sure all the dimensions are measured in feet if not convert them accordingly. Step 3: Use the various formula for finding the area of the given figure. Step 4: Add ft2 as the unit of the calculation in step 3.She determines the surface area of material she needs to create her hat with a radius of 1 foot and a height of 0.5 feet as follows: lateral SA = π × 0.4√ 0.4 2 + 0.5 2 = 0.805 ft 2. Cube. The surface area of a cube can be calculated by summing the total areas of its six square faces: SA = 6a 2 where a is the edge length Area of a circle in terms of circumference: Area = C2 4π = 7.852 4π = 61.69(4·3.14) = 61.6912.56 = 4.91 square feet (*) (*) 4.9087385212341 feet, exactly or limited to the precision of this calculator (13 decimal places). Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.

Imagine I am going to fill an area measuring 5 feet by 3 feet using standard sand. I want equal coverage to a thickness of 2 inches . The sand’s density is 100 lb/ft³ and costs $10 per ton.Use this calculator to find the square footage, square inches, square yardage, square meters or acres for a building, home, garden or construction project. Calculate square footage, inches, yardage, meters …31.416 inches. To find the perimeter of any circle, multiply the diameter by the number pi (π). In this case, 10 in × π = 31.416 in. This circle perimeter calculator finds the perimeter (p) of a circle if you know its radius (r) or its diameter (d), and vice versa.From there, you can determine the area of the large square by squaring it a2(3 + 2 2–√). The area of a octagon is the area of the 4 small triangles ( a2) formed from the truncation of the square, subtracted from the area of the square (S). A = S −a2 = (3 + 2 2–√)a2 −a2.Area= 73.4847 sq. ft. How to Calculate Square Feet for a Circle. Calculate the square footage of a circle by using the formula: A=π r 2 Where A = Area of the circle. r = radius (Tip: To find the radius of the room, simply divide the diameter by two). Example: Calculate the square footage of a round room with a 12ft diameter. To solve the problem:This diameter of a circle calculator will figure out the diameter of any circle given the circumference, the radius, or the area of the circle. Terminology "Area" - The amount of surface covered by a two dimensional shape. It is expressed in square units of measurement, for example square feet, square meters, square inches, square yards, etc.The unit is the same for edge length, radius and perimeter. The area has this unit squared. For example, length in centimeters, area in square centimeters. Example: square and circle with almost the same area. The circle radius is 100 pixels. The edge length of the square is 177 pixels, because there are no fractions of pixels.Free online area of a circle calculator which helps you calculate the are of any circle, given its radius. Supports many different metrics such as in, ft, yd, mm, cm, meters, etc.Now you need to figure out the square footage of the block you are using. To do this, multiply the length and width of the block and divide by 144 - the number of square inches in a foot. The standard block size is 16″ wide x 8″ high and has a square footage of 0.89. block sq ft = 16 × 8 / 144 = 0.89 sq. ft.Calculate the square inches of a circle. The final step is to calculate the square inches of a circle. We can achieve this by applying the circle area formula: area = π * radius². Thus, the square inches of the circle is π * (1.181 in)² = 4.3825 in², which is 4.3825 square inches.Hallways are often included in the square footage of apartments and condos. Let’s take a look at the example below to find out how to calculate the square footage of a condo with an interior hallway. Bedroom 1: 11.81 feet x 12.19 feet = 144 square feet. Bedroom 2: 10.65 feet x 12 feet = 128 square feet.

Sep 30, 2023 · Calculates side length, inradius (apothem), circumradius, area and perimeter. Calculate from an regular 3-gon up to a regular 1000-gon. Units: Note that units of length are shown for convenience. They do not affect the calculations. The units are in place to give an indication of the order of the calculated results such as ft, ft 2 or ft 3. Any ...

This calculator will calculate the area of a circle given its diameter, using the famous formula area = pi times (d/2) squared. It supports different units such as meters, feet, and inches. Just type into the box and hit the calculate button. Calculator · How to Calculate the Area · How to Remember? · Comparing a Circle to a Square · A "Real World" Example ...Use this square calculator to find the side length, diagonal length, perimeter or area of a geometric square. Given any 1 variable you can calculate the other 3 unknowns. Units: Note that units of length are shown for convenience. They do not affect the calculations. The units are in place to give an indication of the order of the calculated ...Suppose we need to top the driveway with a 2,300 kg/m³ asphalt, we can calculate the total weight of the asphalt needed as follows: Weight = length * width * thickness × asphalt density. Weight = 7 meters * 6 meters × 5/100 meters * 2,300 kg/m³. Weight = 4,830 kg or 4.83 tonnes. After obtaining the required weight, we can now finally ...By all accounts, square footage is the most common measurement used to define the size of an area within residential construction projects in North America and beyond. It will often be described as, the house has 2,500 finished square feet, or the master bedroom is 200 square feet. In a square or rectangle area, the square footage is determined ...As it's the length of the shape's outline, it's expressed in distance units – e.g., meters, feet, inches, or miles. How to find perimeter ... Here are the perimeter formulas for the twelve geometric shapes in this calculator: Square perimeter formula: P = 4 a P = 4a P = 4 a. Rectangle ... A perimeter of a circle has a special ...Step 6. Measure the length of the duct in feet (if you want to translate the two-dimensional area to the three-dimensional volume), then multiply the area by the length. Continuing this example, for a 10 foot duct the area is 23.9 feet. Advertisement. Duct areas in square feet can be calculated by using geometry rules for round areas.Yet, in the shop, they ask for the area given in square yards. Width - 120 ft. Length - 80 ft. yardage = 120 ft × 80 ft yardage = 120f t ×80f t. yardage = 9600 ft^\text {2} yardage = 9600f t2. yardage = 1066.7 yd^\text {2} yardage = 1066.7yd2. Then, the yardage is 1066.7 yd 2. You can change between the units freely, and the results will ...

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All you need here is the radius. The sq. ft. formula in case of a circle is: Square footage Circle= π*Radius*Radius. Where: π= 3.14159265359. Square: Square footage Square= Side*Side. Rhombus: In this case you need its base and height. If you enter these data the Square Foot Calculator can quickly do the job for you. Step Two: Multiply the length and width to find the area in square inches. Step Three: Multiply the area by the gravel depth in inches to find the volume in cubic inches - traditional pavers are generally set on a 4″ - 6″ compacted gravel base. Step Four: Divide cubic inches by 46,656 to find the amount of gravel in cubic yards.Another way to calculate the Circle formulas to calculate Circle's distance is with the following formula. D=2R. It is used to calculate twice the radius. C=2πR. It is used to calculate the circumference of the Circle. A=πR2. It is used to calculate the area of the Circle.Calculation works for a lot where the opposite sides are of equal length and is based on the square footage and the length of one side of the lot. Square Footage of the Lot. ft². Length of one side. ft.To calculate the square feet area of a square or rectangular room or area, measure the length and width of the area in feet. Then, multiply the two figures together: Sq ft = Length (ft) × Width (ft).Cylinder Practice Problems. Practice Problem 1: Find the base radius length of a right cylinder if the surface area is $256$ square meters and the height is $18$ meters. Practice Problem 2: Silo has a cylindrical shape. Find the lateral area of a silo $20$ meters tall with the base radius length of $5$ meters.The shape is of a large rectangle and a smaller rectangle. Find the length and width of each section (labeled A and B here), then calculate each square footage: A: 3 ft. x 7 ft. = 21 sq. ft. B: 12 ft. x 10 ft. = 120 sq. ft. Then, add the three values together to get the total square footage you'll need: 120 sq. ft. + 21 sq. ft. = 141 sq. ft.This calculator is to be used as an estimating tool only. Length. Feet. Inches. Width. Feet. Inches. Select a Paver Size. Calculate. Shop Stones & Pavers. Related Tags: Lawn & Garden ...How to find the shaded region as illustrated by a circle inscribed in a square. The circle inside a square problem can be solved by first finding the area of...Area of a Circle Formula. The area of a circle is pi times the square of its radius. The radius is half the diameter. Area = π * (Diameter / 2) 2 ….

Area of a Circle Formula. The area of a circle is pi times the square of its radius. The radius is half the diameter. Area = π * (Diameter / 2) 2The formula for the area of a sector is (angle / 360) x π x radius2. The figure below illustrates the measurement: As you can easily see, it is quite similar to that of a circle, but modified to account for the fact that a sector is just a part of a circle. Measuring the diameter is easier in many practical situations, so another convenient ...Jun 27, 2023 · Choose your room's shape: Rectangle - input the lengths of two walls that touch the same corner; Square - input the length of one wall; and. Other - enter the total measured length of all the walls. 💡 If you are painting or wallpapering, you can also calculate the wall square footage needed for walls of any shape using our area calculator. How big is a 30 inch circle? Use this easy and mobile-friendly calculator to compute the area of a circle given its diameter. calculate me. Shape Area ... The area of a circle is pi times the square of its radius. The radius is half the diameter. ... Circle Area by Diameter. results may be rounded. Diameter in 2 ft 2 cm 2; 30.0 in: 706.9: 4.909 ...0.0304296 square feet (ft²) 4.38186 square inches (in²) Use the this circle area calculator below to find the area of a circle given its diameter, or other parameters. To calculate the area, you just need to enter a positive numeric value in one of the 3 fields of the calculator. You can also see at the bottom of the calculator, the step-by ...Area of a circle in terms of circumference: Area = C2 4π = 100.52 4π = 10100.25(4·3.14) = 10100.2512.56 = 804.2 square feet (*) (*) 804.24771931899 feet, exactly or limited to the precision of this calculator (13 decimal places). Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.Divide the diameter, measured in feet, by two to find the radius of the circle. For example, if the circle's diameter equals 4. 5 feet, divide 4. 5 by 2 to get 2. 25 feet for the radius. Multiply the radius by the radius. Here, multiply 2. 25 feet by 2. 25 feet to get 5. 0625 square feet. Multiply the value for the radius squared by pi ...Free online area of a circle calculator which helps you calculate the are of any circle, given its radius. Supports many different metrics such as in, ft, yd, mm, cm, meters, etc.How Much Material Do You Need? · Rectangle · Triangle · Circle · Conversion Chart – Square Feet to Cubic Yards · Recommended Depth of Materials · Volume Fun Facts.Math. Geometry. Input Data : Radius = 8 in Objective : Find the area of circle. Solution : Area = πr 2 = 3.14 x (8) 2 = 3.14 x (64) Area = 201.1429 in². Area and circumference of circle calculator uses radius length of a circle, and calculates the perimeter and area of the circle. It is an online Geometry tool requires radius length of a circle. Square ft of circle calculator, Our application helps you work out an area of square feet, square meters or square yards for flooring, landscaping, carpets, tiling or construction projects. This tool also provides a cost of materials estimate. Example of costing: $ price: 23.00 per: 100 square unit: foot (ft²) meaning $23.00 per 100 square feet. We are happy to serve!, This calculator is to be used as an estimating tool only. Length. Feet. Inches. Width. Feet. Inches. Select a Paver Size. Calculate. Shop Stones & Pavers. Related Tags: Lawn & Garden ..., There are 144 square inches in a square foot. A square inch is calculated as the area of a square that has 1 inch on each side. What is a square foot (ft 2)? A square foot is a unit of area in both US Customary Units as well as the Imperial System. The symbol for square foot is ft 2 or sq ft. There are 0.00694444 square feet in a square inch. A ..., Area A of a regular pentagon can be calculated from the formula: area = a² × √ (25 + 10√5) / 4, where a is a side of a regular pentagon. Also, you can find the area having the circumscribed circle radius: area = 5R² × √ [ (5 + √5)/2] / 4, where R is the circumcircle radius. Perimeter P of a regular pentagon is equal to the side ..., Our application helps you work out an area of square feet, square meters or square yards for flooring, landscaping, carpets, tiling or construction projects. This tool also provides a cost of materials estimate. Example of costing: $ price: 23.00 per: 100 square unit: foot (ft²) meaning $23.00 per 100 square feet. We are happy to serve!, A circle of radius = 26 or diameter = 52 or circumference = 163.4 feet has an area of: 0.000197326 square kilometers (km²) 197.326 square meters (m²) 1973260 square centimeters (cm²) 1.97326 × 10 8 square millimeters (mm²) 7.6188E-5 square miles (mi²) 236 square yards (yd²), To calculate the concrete volume needed for this type of slab, you need to know the circle's diameter and the depth of this slab.. Formulas. Area. A = π * D² ÷ 4. Perimeter. P = π * D. Volume. V = π * D² ÷ 4 * (d ÷ 12) where A is the area in square feet, p = 3.14159265358979, D = diameter of circle P is the perimeter in lineal feet, p ..., The term 'square footage' denotes an area of measurement, with 'square feet' denoting a unit of area. Our square footage calculator applies the formulas below to determine the square footage of various shapes: Square: Area (ft 2) = Side Length 2; Rectangle: Area (ft 2) = Length × Width, To find the cubic footage of a cylinder, use the following formula: volume = π × r2 × h. The volume of a cylinder in cubic feet is equal to π times the square of the base’s radius r in feet squared times the cylinder’s height h in feet. π is roughly equal to …, Calculate square footage for a circle area. The formula for the square feet or area of a Circular Room = πR². (π is 3.14) and R is the radius of the circle. The radius is half the diameter. ... Halve it to get the radius, then do the πR²calculation to get the area of Circle 1 in square feet. Measure the diameter of Circle 2. Halve it to ..., This calculator is to be used as an estimating tool only. Length. Feet. Inches. Width. Feet. Inches. Select a Paver Size. Calculate. Shop Stones & Pavers. Related Tags: Lawn & Garden ..., SketchAndCalc® is an irregular area calculator app for all manner of images containing irregular shapes. Uniquely, the area calculator is capable of accurately calculating irregular areas of uploaded images, photographs or plans quickly. Using the area calculators autoscale tool, you can set the drawing scale of common image formats such as ..., Area of Half Circle Calculator ... Area Sq.Ft. Area Sq.Yds. Area in Acres: Area of Half Circle Measurements Needed., Use this wallstone calculator to help you determine how much natural stone your project requires. Enter the depth, length and height of your wall to calculate the cubic feet (CF) of New England Wallstone Fieldstone needed and the number of tons to order. How to Fix a Pothole - Stoneyard® Aquaphalt 12 Minute Solution. Water Activated., Jun 5, 2023 · As a unit of area, it has a magnitude equivalent to the area of a square with sides of 1 foot. This size makes it helpful to talk about the area of everyday objects such as a house (typically 500-1000 sq ft), a room (~100 sq ft) and even an A4 piece of paper (0.65 sq ft) without having to use either very big or very small numbers. , Calculate the square footage of the lawn for new turf. Measure the length and width of the area. Multiply them together to obtain sq. ft. If needed, use our acreage calculator to find the size of your lawn. Divide the square footage result by 10 (most rolls cover ten sq. ft.) to obtain the number of rolls of turf needed., This tool helps to estimate precisely the surface area of the pipe using the formula finding the area of the cylinder: V = π × d × L, where d – is the outer diameter of the pipe (mm/in), L – is the length of the pipe (m/ft). Using this application, you will no longer have the question: what is the area of the outer surface of the pipe., You can look at the segment area as the difference between the area of a sector and the area of an isosceles triangle formed by the two radii: Asegment = Asector - Atriangle. Knowing the sector area formula: Asector = 0.5 × r² × α (learn more about this in the sector area calculator) An equation for the area of an isosceles triangle, given ..., Using square footage formula, Area of a rectangle = Length × Breadth. Thus, are of each tile = 8 × 36 = 288 square inches. But, 1 square foot = 12 in × 12 in = 144 square inches. Thus, 288 square inches = 2 square feet. Hence, the area of each tile is 2 square feet., This calculator will calculate the area of a circle given its diameter, using the famous formula area = pi times (d/2) squared. It supports different units such as meters, feet, and inches. Just type into the box and hit the calculate button., Length: (B)Edge/Brace Length: (C)Corner to Pup Length: SQUARE TO OCTAGON convert the easy way 0.41421 online calculator. Watch on., This tool will calculate the area of a rectangle from the dimensions of length and width, A=LW. ... Circle diameter to area calculator; Length and distance converter; Calculate volume capacity from length, width and height; Contents ... square foot (sq ft) - 0.09290304 m² ..., This calculator uses feet and or inches for measurements. Donut = a circle with a smaller circle centred inside. Donut Area and Perimeter. Outer Diameter: ft in: n d: ... one square foot ( ft²) = 144 square inches (in²) one square inch (in²) = 0.00694444444444443 square feet (ft²) one square foot ( ft²) = 0.09290304 square metres (m² ..., Sep 25, 2023 · This is the circle's diameter, in this case, 31.8 centimeters. Divide by 2. This result is the circle's radius of 15.9 centimeters. Multiply the radius with itself, getting the square, in our case 256 cm². Multiply by π, or 3.14 for an estimation. That's it; a circle with a circumference of 1 meter has an area of 795.78 cm². , Establish the depth of the excavation. Let's say it's d = 0.5 yd. Multiply the area by the depth of the excavation to obtain its volume: 36 × 0.5 = 18 cu yd. The volume of sand required is equal to the volume of excavation. Our sand calculator will display this value for you., For this example, consider a circle with a radius of 10 feet. Square the radius: 10^2 = 100 square feet. Multiply the result by pi, which equals approximately 3.142: 3.142 x 100 = 314.2. This answer is the circle's linear footage. A theoretical single board with a 1-foot width would need to be about 314 feet long to equal the circle in area., If you know the lengths of all sides ( a, b, and c) of a triangle, you can compute its area: Calculate half of the perimeter ½ (a + b + c). Denote this value by s. Compute s - a, s - b, and s - c. Multiply the three numbers from Step 2. Multiply the result by s. Take the square root of the result., Calculate the square footage of the lawn for new turf. Measure the length and width of the area. Multiply them together to obtain sq. ft. If needed, use our acreage calculator to find the size of your lawn. Divide the square footage result by 10 (most rolls cover ten sq. ft.) to obtain the number of rolls of turf needed., Number of Bricks = ceil (2 * π * radius / brick length) where. ceil is a function that rounds up the decimal number to the nearest whole number. π is a mathematical constant, approximately equal to 3.14. radius is the distance from the center of the circle to the outer edge of the circle. brick length is the length of each individual brick., Fill 50 square feet with a custom aggregate For our second example, imagine I need to fill a space measuring with a custom material to a depth of 8 inches. I don't know the material's density, but it weighs 550 pounds for five cubic feet and costs $70 per US short ton., A circle of radius = 21 or diameter = 42 or circumference = 131.9 feet has an area of: 0.000128671 square kilometers (km²) 128.671 square meters (m²) 1286710 square centimeters (cm²) 1.28671 × 10 8 square millimeters (mm²) 4.968E-5 square miles (mi²) 153.889 square yards (yd²) 1385 square feet (ft²) 199440 square inches (in²), The units are in place to give an indication of the order of the results such as ft, ft 2 or ft 3. For example, if you are starting with mm and you know r and h in mm, your calculations will result with s in mm, V in mm 3, L in mm 2, B in mm 2 and A in mm 2. Below are the standard formulas for a cone., Area= 73.4847 sq. ft. How to Calculate Square Feet for a Circle. Calculate the square footage of a circle by using the formula: A=π r 2 Where A = Area of the circle. r = radius (Tip: To find the radius of the room, simply divide the diameter by two). Example: Calculate the square footage of a round room with a 12ft diameter. To solve the problem: