how to calculate roof area

Gable & Hip Roofs will have the same area provided that the pitch remains the same. When calculating the area of a flat roof for laying the roll-up roll materials, the area of the parapets is taken into account separately. Measure the length of the roof surface, including overhangs. Two User Defined Columns need to be created. Regardless of complexity (multiple ridge lines, hips, valleys etc), if the roof has a single pitch or incline throughout you can simply draw the perimeter of the entire roof using SketchAndCalc’s™ line drawing tools. How to Calculate Roof Area Step 1. How to Calculate Your Roof Area. The run is the distance from the outside edge of a perimeter stud wall to the center of the house. The calculator cannot account for complex shapes based on a measurement of square footage alone. Find the square footage of the roof. Watch this short video titled Area of a roof instead. The Basic Element List will give you the area of the roof surface, not the 'Area on Plan', like the Element Information will. Google Maps or other overhead mapping software can also be used to calculate your roof surface area. (ex: If pitch is 4 in 12, divide 4x12. In addition, whatever the roofing material, it is usually put lapped to prevent water from leaking past the roofing. There's a difference, so be careful. For example, you will need to figure out the exact number of shingles required to cover the entire roof area. The simplest is the roof square calculator which requires feeding of various roof measurement and the calculator provides with an answer. This gives us a 3D roof area of 1,625 sq.ft. 14 How To Calculate The Area Of A Roof : Roof Area Calculator • Surface Area Multiplied By Pitch – How To Calculate The Area Of A Roof. Place the ladder beside your building at the gable end. You want a roof area calculator that provides accurate estimates to help you order materials such as shingles, membrane, roofing, or ceramic tile. This applies to lengths as well as areas. The incline or pitch of a roof can be easily measured with a level, tape measure, and a pencil. Free roof area calculator. Step 2. The Basic Element List will give you the area of the roof surface, not the 'Area on Plan', like the Element Information will. Therefore, mark off 12 inches on the level and place it down horizontally against the roof rafter. Then, take the product of these two dimensions and multiply it by your pitch multiplier. There's a difference, so be careful. Using dormer windows as an example, you’ll add a new layer after drawing each dormer. The incline or pitch of a roof can be easily measured with a level, tape measure, and a pencil. Watch this short video titled Area of a roof instead. This tells you how to calculate roof areas suitable for using in all the programs on this site. There are different methods available to calculate roof area. This gives you ⅓) Square the answer you calculated before. The roof pitch conversion factor is a number that, when multiplied by the area covered by the roof, gives an estimate the total surface area of the sloped roof itself. Planswift – How To Calculate Roof Area, OSB Sheets, Rolls . The first is for the roof angle and the second is a formula that calculates the area. For example, if the wall is 25 feet wide and the eaves are 20 feet above ground level, the wall has a surface area of 500 square feet: 25 x 20 = 500. SketchAndCalc™ can be used in other ways. The answer will be 1/3. Once you have these measurements, you can calculate your roof area as follows: Roof width (m) x rafter length (m) = half roof area (m²) The above calculation estimates the area of half of your roof so you will need to double this to get a final estimate of the full roof area. Roof Area Calculators: For each of the roof types pictured below, L = Horizontal Length, W = Horizontal Width, and H = Vertical Height, all entered in feet.Slope in inches per foot may substituted for H. . Using the aggregate area of these simple shapes can yield a more accurate roof area to be used with the Roofing Material Calculator. How to calculate Roof surface There are 5 easy steps to figure out how many drains your commercial roofing project will need. This gives us a 3D roof area of 1,625 sq.ft. Roof slope, pitch, rise, run, area calculation methods: here we explain and include examples of simple calculations and also examples of using the Tangent function to tell us the roof slope or angle, the rise and run of a roof, the distance under the ridge to the attic floor, and how wide we can build an attic room and still have decent head-room. First, multiply the length by the width. That gives you 5,590 square feet, which is the actual area of the surface of the roof. Then proceed to draw the surface area of the roof that has a different pitch. Now you’re ready to price out the materials. The rise is the distance from the top of a stud wall to the peak of the roof. A roof pitch multiplier, also known as a roof pitch factor, is a number that, when multiplied by the area covered by a sloped roof, gives the actual area of the roof. Use the appropriate pitch multiplier for each totaled area calculated, then sum all the areas together. Just find the footprint area and multiply it by pitch factor. When determining sloped roof area for rainfall catchment, for example, you calculate the area protected by the roof, but when replacing the tiles you calculate the surface area of the roof itself. You can also adjust the grid transparency and drawing line weight. Calculating your roof surface area Building plans offer the easiest way to calculate your roof surface area – after all, the numbers should all be on there. In this article, we will talk about calculating the roof surface starting from - Roof incline (pitch US ) - House surface (plus the area with which the roof extends outside the house - it can be calculated by multiplying the extension with the perimeter of the house). If you wish to find out the area of a construction element (e.g. 1. calculate roof area #94050. This is the first thing to do when you set out to calculate the area of your roof. It is necessary to take into account how the overhang will be located - along the perimeter, with a closed parapet or with a lower overhang and a triangular parapet. All these tools are free and we hope - easy and intuitive to use. If, however, the method employed is manual, the following steps are followed to determine roof area. Calculate the total roof area by multiplying its length by width. If the roof has multiple pitches, such as those found on dormer windows or porches you will need to draw these separately. Dear Jerry: I’m autograph in that hopes you can advice us with a botheration with the gutters on our in advance Cape Cod-fashion house. These have different areas because the roof lies on the hypotenuse of a triangle, whereas the area protected by it is horizontal. The most common roofing materials used in the United States include shingles, membrane roofing, and ceramic tile, all of which have different life spans. Experts recommend that a pitch measurement is taken before using a roof area … For one of our branches to give you a quote we need the following information about your roof: What type of Piched Roof are you working on (see diagrams) and the measurements if possible Pitch of roof or Rafter length What parts of the roof you want a quote for (e.g. You’ll notice as an area is drawn the area and perimeter results are displayed in the bottom right corner. Using the table below, lookup the pitch/es and make a note of the number/s in the multiplier column. Given pitch and a horizontal area measurement, multiply the horizontal area by a correction factor corresponding to pitch, provided in the table below, to determine the actual area of the roof to … The maths behind this number is that it is the square root of ((rise/run) 2 + 1). Sometimes it is easier to calculate the area by summing up the areas of smaller parts. So for a roof that is 5 m long, with a height of 4 m and the roof width is 8 m (which makes the half roof width 4m) we can calculate the effective roof area like this. Roof pitch affects the actual area of the roof. Assuming this is a hip roof, we multiply this by 1.1, which gives us roughly 18 squares or 1,800 square feet of the roof surface. Determine the roof area by using a mathematical formula that accounts for the roof length, total span, and roof pitch: Determine your roof pitch by using a pitch gauge (available at most home improvement stores) or a smartphone app (available free through any app store). That gives you 5,590 square feet, which is the actual area of the surface of the roof. Calculate the area of multiple plots of land. Hip Roof Area Calculator. In the United States, a run of 12 inches (1 foot) is used, and pitch is measured as the rise of the roof over 12 inches. calculate roof area #94050. Roofing professionals can also use SketchAndCalc™ to provide fast accurate quotations over the phone. The following tools estimate the area of a roof, as well as the amount of materials necessary to construct a roof of a given area. Roof width (m) x roof slope height (m) = half roof area (m²) Take this example of a perfectly square house with 76m² floor space, a 45° pitched roof and a 2.35m roof height. Roof Area Calculator • Surface Area Multiplied by Pitch . Next, multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area. Some homes will have roofs with multiple pitches. Here is the online hip roof area calculator which helps you calculate the hip roof parameters such as roof rise, common and hip rafters length and roof area based on width, height of roof base and the roof pitch (identical for all sides). To calculate the true area for shingles or any roof installation you can use the following steps: Using the number you got for the roof’s pitch, you will divide it by 12. Not only will it help eliminate waste, but it will also ensure that you buy just enough for the roofing job. For instance, a 7/12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. This calculation option will also give you a very accurate result. These have different areas because the roof lies on the hypotenuse of a triangle, whereas the area protected by it is horizontal. On a ladder beside the roof, place the level a foot or so up the roof, hold it level, and measure from the 12-inch... 2. Privacy Policy • Terms and Conditions • Cookie Policy, SketchAndCalc uses cookies to ensure you get the best experience. Take the area of the roof’s footprint, say it's 5,000 square feet, and multiply 5,000 by 1.118. Using a Fill Fills have the ability to display Area. The formula for the roof pitch multiplier comes from the formula for a right triangle, and more specifically the Pythagorean Theorem: Depending whether the roof area is measured horizontally (possibly from a drawing or photograph), a correction factor is necessary to determine the actual area of the roof. The pitch of the roof is the rise over a 12-inch run. These two values can be calculated to provide the actual roof area. It is the Horizontal area that is required, (not the sloping, actual area). Roof pitch is given as the number of inches in height change over the distance of one foot. Use our roof pitch calculator to find the pitch of your roof. A good roofing contractor will take the time make sure that the take-off is accurate. As such, while it can be cumbersome, measuring the area and pitch of each part of the roof and multiplying by the corresponding correction factor will result in the most accurate estimate of necessary roofing materials. This will provide an area calculation for clay or concrete roof tile, natural or composite slate, underfelt or breathable felt and ridge length. CALCULATING THE TRUE AREA. Step 1: Calculate total roof area. The roof’s pitch is the number of inches the roof rises in 12 inches. Example: A 200 ft. x 250 ft. = 50,000 sq. When calculating the area of a flat roof for laying the roll-up roll materials, the area of the parapets is taken into account separately. Shingle roofs typically have a life span of 15-30 years, while membrane roofs usually last 5-15 years. 4. Dividing the total area of your roof by 100 will therefore help you figure out how many squares worth of shingles to order. How to calculate Roof surface For a roof incline of (pitch x/12): /12 Determine leader or pipe size. Therefore, mark off 12 inches on the level and place it down horizontally against the roof rafter. In roofing we call the calculation of roofing materials needed a “take-off”. Next, measure vertically from the 12-inch mark on the level straight up to the underside of the rafter, as illustrated below. If, however, the method employed is manual, the following steps are followed to determine roof area. Ridge vent openings are best finished with coil rather than partial shingle. The best part of a roofing calculator is that it offers a free insight into the total cost of the replacement roof project on a sq ft basis. The "House Base Area" is the area of land that the house covers, and for more complex shapes, can be estimated using the Area Calculator. After drawing the perimeter of the roof, add a new drawing layer with the plus (+) symbol found in the bottom right corner. (l×h)/2 = Area Calculating an area of a triangle when estimating … Or perhaps just an irregular shape? Next, you need to square your outcome. Calculate the exact roof area. Measure the length and width of each portion of the roof, multiply length by width for each plane, and then add the planes together for the total square footage. Step 2: Determine leader size. Calculate the total surface area of the roof using the following formula: pi times the radius times the rafter length, also called the slant height. The calculated area is only an estimation. Calculate the square footage area of a Hip Roof. Let’s Get Calculating Once you have these measurements, you can calculate your roof area as follows: Roof width (m) x rafter length (m) = half roof area (m²) The above calculation estimates the area of half of your roof so you will need to double this to get a final estimate of the full roof area. a Slab with hole, pictured here), there are several ways to do it. This calculation is important because it can greatly affect your estimates, the air circulation in a room, and more.The Custom Columns in Revu’s Markups tab supports formulas and math constants, functions and operators. In cases where a roof has a complex shape, such as in the image to the right, measuring the dimensions and areas of each part of the roof to calculate total area will result in a more accurate measurement of area. Google Maps or other overhead mapping software can also be used to calculate your roof surface area. The rise is the height of the roof, and the run is the horizontal span (as pictured above). Here is the online hip roof area calculator which helps you calculate the hip roof parameters such as roof rise, common and hip rafters length and roof area based on width, height of roof base and the roof pitch (identical for all sides). Now, assuming an average pitch of 9:12, we multiply the 2D area of 1,300 by 1.25. Take the area of the roof’s footprint, say it's 5,000 square feet, and multiply 5,000 by 1.118. All these tools are free and we hope - … The roof’s pitch is the number of inches the roof rises in 12 inches. You want a roof area calculator that provides accurate estimates to help you order materials such as shingles, membrane, roofing, or ceramic tile. So keeping with our roof pitch of 4 this gives us 1/9. When zoomed in, switch to satellite view. The surface area of the roof is found by multiplying the number found in Step 3 by the number found in Step 1: $$Surface\,area\,of\,roof = Area\,covered\,by\,roof × Roof\,pitch\,factor = 800 × 1.12 = 896\,square\,feet$$ In other words, the surface area is impacted by the slope of the roof. Calculate the area of multiple plots of land, Land Area Calculator • Multiple Irregular Shapes, UPDATED: Area Calculator • Phone • Tablet • Desktop. Knowing how to estimate roofing materials is important. Use your measuring tape to measure 12 inches on your large level and put a mark at the 12-inch line. The number you get will be an accurate estimate of how much area you have to cover for your roofing project. CALCULATING THE TRUE AREA. Although ceramic tile roofs are expensive, they can have a life span of over 100 years. 14 How To Calculate The Area Of A Roof : Planswift – How To Calculate Roof Area, OSB Sheets, Rolls – How To Calculate The Area Of A Roof. Roof pitch is a determining factor for cost of the roof, as well as the roof area, and the type of materials used. Determine the dimensions of the roof. It is necessary to take into account how the overhang will be located - along the perimeter, with a closed parapet or with a lower overhang and a triangular parapet. Calculating the surface area of a sloped roof can be time-consuming without the right tools. Experts recommend that a pitch measurement is taken before using a roof area calculator.Don’t have time to read? Roof pitches are described in terms of rise and run. Hip roofs can present a problem for height measurement, and the slope method may be substituted in place of height measurement. Calculating your roof surface area Building plans offer the easiest way to calculate your roof surface area – after all, the numbers should all be on there. Determine the roof area by using a mathematical formula that accounts for the roof length, total span, and roof pitch: Determine your roof pitch by using a pitch gauge (available at most home improvement stores) or a smartphone app (available free through any app store). With a single pitch roof you’ll have only one area result that relates to the entire footprint or perimeter of the roof. When determining sloped roof area for rainfall catchment, for example, you calculate the area protected by the roof, but when replacing the tiles you calculate the surface area of the roof … It is sometimes called the roof pitch multiplier.. Square the result of Step 1. And that’s the number you were looking for. Here you will find roofing related tools like: roof area calculators, roof materials calculators, pitch calculators, geometric shapes calculator. Roof Area calculator. The run is the distance from the outside edge of a perimeter stud wall to the center of the house. To calculate the true area for shingles or any roof installation you can use the following steps: Using the number you got for the roof’s pitch, you will divide it by 12. Identify the roof’s structure. (⅓ squared = 1/9) Add one to your answer. To accurately calculate the area of your roof, you must first determine its slope, or pitch. The rise is the distance from the top of a stud wall to the peak of the roof. And that’s the number you were looking for. For an accurate surface area measurement you should make note of these additional structures. 5m x 4m x (4/2) = 40 square metres. Calculating the surface area of a sloped roof can be time-consuming without the right tools. For example, if a roof has a pitch of 4/12, then for every 12 inches the building extends horizontally, it rises 4 inches. Calculate the area of the wall below the gable by multiplying the width of the wall by the height of the eaves. An important part of any roofing repair or replacement project is being able to accurately calculate the quantity of roofing materials required to finish the job. For example, a 4/12 pitch roof that is 100 square feet: 100 × 1.054 = 105.4ft 2. ft. area. Roof pitch is the measurement of a roof's vertical rise divided by its horizontal run. That is, trimming, intersection, and increasing the area … The only difference in this calculation to the one for a Gable roof area is the amount of the Ridge. This gives you ⅓) Square the answer you calculated before. Outside of the U.S., a degree angle is typically used. Fortunately, if you know the roof’s pitch, or have access to the home’s attic to measure its incline you can arrive at an accurate roof area calculation using SketchAndCalc™. Estimate the area of the simple parts of the roof. 1 roof square = 100 square feet; The length (l) times the height (h) of a triangle is twice its area (A2). Let’s Get Calculating. Calculate the total surface area of the roof using the following formula: pi times the radius times the rafter length, also called the slant height. For example, if your pitch is 4 in 12, you need to divide 4 by 12. It is often compared to slope, but is not exactly the same. For multi-pitched roofs simply add the areas of all common pitches together by toggling layer visibility from the summed layer (identified by the ‘eye’ symbol) at the left of the layers control. Add 1, then take the square root. To accurately calculate the area of your roof, you must first determine its slope, or pitch. (⅓ squared = 1/9) Add one to your answer. The effect of the roof slope is allowed for by entering the angle of the roof in the programs. This is expressed in terms of how many inches the roof rises for … So if you place a fill on top of the slab, the fill area will… So if you divide your answer of a product of length times height by two, you will get the area of a triangle. Search the homes postal address from the map controls that appear in the top left corner. This will provide an area calculation for clay or concrete roof tile, natural or composite slate, underfelt or breathable felt and ridge length. Porches and dormer windows, for example, can have a different pitch from that of the rest of the house. Depending whether the roof area is measured horizontally (possibly from a drawing or photograph), a correction factor is necessary to determine the actual area of the roof. A number of users have asked if Revu’s built-in measurement tools are able to calculate the area of a roof from a plan view. Hip roof is a roof with a sharp edge or edges from the ridge to the eaves where the two sides meet. The roof pitch is the slope of the rafter. Hip Roof Area Calculator. Accounting for dormer windows and other structures that might share a different pitch, the first step is to calculate the footprint of the roof, or the area it occupies. TIP: Line length labels are displayed as you draw. If you find these labels obscure the view of the roof just switch them off from Menu > Settings > Application. Here you will find roofing related tools like: roof area calculators, roof materials calculators, pitch calculators, geometric shapes calculator. This calculator will help you estimate hip roof parameters, including rafters and roof area person_outline Anton schedule 2011-08-29 17:53:20 One of our users asked us to create a calculator that would help him estimate hip roof parameters, such as rafter lengths, roof rise and roof area. Assuming this is a hip roof, we multiply this by 1.1, which gives us roughly 18 squares or 1,800 square feet of the roof surface. This multiplier number will be used to multiply the surface area calculation that SketchAndCalc™ will provide. (ex: If pitch is 4 in 12, divide 4x12. Roof Pitch Area Multipliers What is the roof pitch factor? Let Owens Corning Roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic, with our 4-step ventilation calculator. Multiply the area by the pitch multiplier to get the roof's square footage. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. Dear Jerry: I’m autograph in that hopes you can advice us with a botheration with the gutters on our in advance Cape Cod-fashion house. The roof can be divided into small rectangles, triangles and squares. While it is possible to estimate the amount of necessary materials using only the total roof area measurement, as can be seen from the table, depending how large the pitch of the roof, the actual area of the roof can differ by up to 2.236 from the measured total area at a pitch of 24/12. Measuring the Roof’s Pitch. Both metric and imperial measurement systems are displayed in a popup menu over the results area. Knowing how to calculate your roof area can be a beneficial first step in estimating the cost of a new metal roof. Straight to the answer Divide your roof pitch by 12. This calculation option will also give you a very accurate result. Although there’s isn’t any standard pitch of a roof used on all kinds of sloped roofs, you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing … Gable & Hip Roofs will have the same area provided that the pitch remains the same. Roofing professionals can also use SketchAndCalc™ to provide fast accurate quotations over the phone. On a ladder at the gable end of your house, place the level against the gable trim, flat against the side of the... 3. Hip roof is a roof with a sharp edge or edges from the ridge to the eaves where the two sides meet. Measure the length of the roof surface, including overhangs. The roof slope height is 6.98m. In … 1. First, use your measuring tape to measure 12 inches on your large level and make a mark at … Take your area result and multiply it by the pitch multiplier (or slope correction factor) found in the table above to arrive at the roof’s surface area. Step 4: Calculate The Simple Roof Areas On a simple hip or gable roof, multiplying the eave to ridge length by eave length will give the area to be multiplied by pitch factor. Roof Area Estimates. If you have a simple gable roof, you’ll only need to measure and sum up the 2 planes of the roof. Roof Area calculator. Determine the slope of the roof. It affects walkability as well as drainage, and roofs in areas of high rain or snowfall tend to have steeper pitches. Roof pitches are described in terms of rise and run. The pitch is commonly defined as the ratio of rise over run in the form of x/12. More unusual uses here. - House surface (plus the area with which the roof extends outside the house - it can be calculated by multiplying the extension with the perimeter of the house). Ascend to the top of your roof. Calculate the area of a roof to work out how much guttering is required. Roofing materials are typically packaged in “squares,” each of which is the equivalent of 100 square feet (9.3 m 2) of roof space. That measurement is the number of inches the roof rises in 12 inches. The simplest is the roof square calculator which requires feeding of various roof measurement and the calculator provides with an answer. Fortunately, if you know the roof’s pitch, or have access to the home’s attic to measure its incline you can arrive at an accurate roof area calculation using SketchAndCalc™. And for a roof with a slope of 6:12, that number, 1.118, is your roof slope multiplier. Login to SketchAndCalc™ and select ‘Show Maps’ from the Menu. Follow these steps to figure out the exact area of your roof: Take your pitch number and divide it by 12. You’ll have to calculate your roof area, or the overall size of your roof, to determine the amount of materials you’ll need. How to calculate the roof area of a building . Enter Square Footage. There are different methods available to calculate roof area. First, you need to know two specific values in order to calculate the area of a roof: (1) the area of the roof in plan view and (2) the angle of the roof pitch. Remember – calculate the area of the roof should not be at the edges of the existing structure, but to the eaves. Given pitch and a horizontal area measurement, multiply the horizontal area by a correction factor corresponding to pitch, provided in the table below, to determine the actual area of the roof to be used in the Roofing Material Calculator. The square footage of a Hip roof area is identical to the square footage of a Gable roof of the same size. Multiply the length times the width to calculate the square footage. The Area Calculator can be used to calculate the area of a variety of simple shapes that together can comprise the area of the roof. tiles, battens, felt, syklights … Area that is, trimming, intersection, and multiply it by your number! Is drawn the area of a perimeter stud wall to the one for a gable roof of the just..., geometric shapes calculator tile roofs are expensive, they can have a simple gable roof the! Number and divide it by your pitch multiplier sure that the pitch of rest. The programs on this site 100 × 1.054 = 105.4ft 2 very accurate result intuitive. 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Divided by its horizontal run used with the roofing job these steps to figure the! Area calculators, roof materials calculators, geometric shapes calculator measure and sum up the 2 of! Span ( as pictured above ) 7 inches for every 12 horizontal inches find roofing related tools like: area... The homes postal address from the top of a triangle, whereas the area multiplying! And we hope - easy and intuitive to use labels obscure the view of the roof however, method! Multiply it by your pitch number and divide it by your pitch and. Fill Fills have the ability to display area to the one for a roof can be beneficial... Two values can be a beneficial first Step in estimating the cost of a roof with a single roof! 3D roof area calculators, pitch calculators, pitch calculators, roof materials calculators, pitch,... Price out the exact number of shingles required to cover for your roof pitch is the distance from top! Windows as an example, can have a life span of 15-30 years, membrane... Finished with coil rather than partial shingle not exactly the same area provided that the pitch the. Measurement and how to calculate roof area slope method may be substituted in place of height measurement and! Area … knowing how to calculate roof area of a triangle, the! Rain or snowfall tend to have steeper pitches accurate result outside edge of a roof work! The hypotenuse of a sloped roof can be time-consuming without the right tools pitch.... Pitch refers to the eaves where the two sides meet 100 will therefore help figure. Is expressed in terms of rise and run place of height measurement to accurately calculate square! Overall roof area rest of the slope method may be substituted in place of height measurement, multiply... Height by two, you ’ ll notice as an area is identical to the center of the structure. ( 4/2 ) = 40 square metres materials needed a “ take-off ” its length by width on site! Will need to measure and sum up the 2 planes of the existing structure, but it will also you! Over 100 years is accurate the angle of the roof has multiple,... Sloping, actual area ) postal address from the outside edge of a sloped roof can be time-consuming the! Required, ( not the sloping, actual area of the roof rises in,... With our roof pitch by 12 eliminate waste, but to the center of the surface the... Can have a simple gable roof, you need to measure and sum up areas! Example, if your pitch is 4 in 12 inches answer of a product of additional... Controls that appear in the form of x/12 area calculated, then all... Horizontal inches divided into small rectangles, triangles and squares several ways to do it SketchAndCalc uses cookies to you...

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