granite slab weight calculator granite slab weight calculator

alert("You must enter a value for each dimension. After plugging in a few necessary numbers, the estimator will do the calculations and give you the results in seconds. Sponsored Links 1 psi (lb/in2) = 6,894.8 Pa (N/m2) 1 lbf (Pound force) = 4.45 N = 0.454 kp Sponsored Links Related Topics Miscellaneous - Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more. This means that most people who have used this product are happy with it. document.calculator.img3.src="https://www.artfiberglass.com/calc/images/notreq.jpg"; document.calculator.units2.selectedIndex="3"; "); A granite countertop estimator is an online tool that provides data for the material, cost, and labor associated with this project. Granite weights approximately 20 lbs. Take out the quantity from architectural floor layout drawing and add for wastage's of Design, Handling and Cutting Etc. Weight=(Values[0] * Values[1] * Values[1] * Values[2] * Values[4]); This field is for validation purposes and should be left unchanged. } function ResetShape(){ Not only are they a beautiful choice but theyre a practical choice as well. } WebCalculate weight of granite countertop - 20 sq ft X 18 pounds per square ft. = 360 pounds. How big is the average granite countertop slab. Marble * Granite } Weight=(Values[0] * 0.785398 * ((Values[1] * Values[1]) - (Values[2] * Values[2])) * Values[3] * Values[4]); If you are considering installing granite countertops at your home, the first step is to estimate how much you need and how much you will spend. Disposal: In some cases, the contractor may want to leave some of the granite remnants behind. document.calculator.imgshape.src="https://www.artfiberglass.com/calc/images/oct-points.jpg"; The weight of granite depends on its density. function DensityConverter(value,unit){ } The weight of granite depends on its density. Weight=(Values[0] * 0.86602 * Values[1] * Values[1] * Values[2] * Values[4]); if((selShape=="0"||selShape=="7")&&(val2=="")){ The contractor will do some on-site cutting after the countertop is in place. This post was published on 2023-01-15. WebGranite slab weight calculator. A granite countertop calculator gives a general idea of how much material you will need. document.calculator.img1.src="https://www.artfiberglass.com/calc/images/width.jpg"; They are durable, usable, and, most of all, beautiful. Granite, solid weighs 2.691 gram per cubic centimeter or 2 691 kilogram per cubic meter, i.e. You can use an online estimator to get a general idea of what you should pay. Stone Weight Calculator. per square foot. value=value*0.03613; * Phone. "); WeightTemp=Weight*100000000; Very very good app, easy to use and easy to help you. document.calculator.img3.src="https://www.artfiberglass.com/calc/images/length.jpg"; For instance, calculate how many ounces, pounds, milligrams, grams, kilograms or tonnes of a selected substance in a liter, gallon, fluid ounce, cubic centimeter or in a cubic inch. Units[3]=document.calculator.units3.options[document.calculator.units3.selectedIndex].text; } The table below displays the standard weight of granite based upon slab size. /*Rounding pounds*/ WebA. Weight=(Values[0] * 0.707327 * Values[1] * Values[1] * Values[2] * Values[4]); document.calculator.material.selectedIndex="1"; per square foot. After detaching and removing the countertop, the contractor will break it into smaller pieces for hauling. WebWeight of Granite: How Much Do Slabs Weigh? The table below displays the standard weight of granite based upon slab size. return false; The contents of this website is only our opinion on the topic and we dont guarantee that its error free. document.calculator.units0.selectedIndex="0"; An average slab weighs about 1000 lbs. If you have any questions or feedback, please dont hesitate to contact us. Therefore, it is not recommended to make countertops longer than 100 without a seam, or without checking with the fabricator for exact slab sizes. Granite, solid weighs 2.691 gram per cubic centimeter or 2 691 kilogram per cubic meter, i.e. The table below displays the standard weight of granite based upon slab size. value=value*0.03613; It works for all quartz, marble, granite countertop materials. For example: If the stone you are working with is granite that is approximately .64ft3 your calculation should look like the following; ft3 x lbs/ft3 = lbs so your calculation Granite, solid weighs 2.691 gram per cubic centimeter or 2 691 kilogram per cubic meter, i.e. if(unit=="1") To pass quality, the sentence must be free of errors and meet the required standards. document.calculator.units2.selectedIndex="3"; Solve My Task. The table below displays the standard weight of granite based upon slab size. They have to earn money. Call us to get help selecting the right stone or fill out the form below and Stoneyard stone specialist will contact you. if(Shape=="2")/*Hexagon Points*/ Were always happy to help! document.calculator.img1.src="https://www.artfiberglass.com/calc/images/gauge.jpg"; We will show you how to work with Granite slab weight calculator in this blog post. value=value*62.42797; WebGranite slab weight calculator Granite, solid weighs 2.691 gram per cubic centimeter or 2 691 kilogram per cubic meter, i.e. WeightTemp=WeightTemp*10000; document.calculator.img1.src="https://www.artfiberglass.com/calc/images/diameter.jpg"; It gives correct solutions. Those factors include the type of granite selected and the location of the installation. if (MatlSelect>"0") { if(!Valid) document.calculator.value1.value=""; var Valid; A slab of quartzite would be closer to 1200 Some of those variations are going to be undesirable. Weight of the selected item is calculated using its density and entered volume. WebCalculate weight of granite countertop - Granite weights approximately 20 lbs. Measure those numbers carefully, getting the length and width of the area where you will install the countertop. WebStone Weight Calculator What is the weight of granite? t2 = jQuery("#l2").val() * jQuery("#w2").val(); Another consideration is that granite can vary among itself as it is a naturally-forming stone. t4 = jQuery("#l4").val() * jQuery("#w4").val(); document.calculator.imgunits.src="https://www.artfiberglass.com/calc/images/grams.jpg"; Much like granite, these surfaces come in a range of colors and styles. document.calculator.units2.selectedIndex="3"; WebGranite Weight Calculator So, to calculate the weight of your slab of granite, you'll want to multiply the weight per square foot by the number of square feet. if((val0=="")||(val4=="")){ The average 3/4 thick granite weighs 13 pounds per square foot, 1 value=value*1; Find the stationary points and the local extreme values. document.calculator.units0.selectedIndex="0"; document.calculator.qty.value="1"; In some cases, there may be enough waste after they cut the countertops from the slab that it will be a usable piece. Granite, solid weighs 2.691 gram per cubic centimeter or 2 691 kilogram per cubic meter, i.e. WebSo, to calculate the weight of your slab of granite, you'll want to multiply the weight per square foot by the number of square feet. var img1; To calculate the weight of the slab, use the following formula: Weight (lbs) = (Length (in) x Width (in) x Thickness (in) x Density (lbs/ft^3)) / 12, For example, if you have a granite slab that is 48 inches long, 36 inches wide, and 1 inch thick, with a density of 170 lbs/ft^3, the weight of the slab would be: Weight (lbs) = (48 x 36 x 1 x 170) / 12 = 3456 lbs. if(MatlSelect!="0"){ will be shown in the DENSITY box with g/cc as Whether you're struggling with a difficult concept or just need someone to bounce ideas off of, expert professors can be a great resource. WebKitchen countertops usually have a square footage of between 40SF and 60SF. That template will act as a guide during the fabrication process to keep mistakes and waste to a minimum. This can vary. document.calculator.imgshape.src="https://www.artfiberglass.com/calc/images/oct-af.jpg"; WebUse this calculator to estimate the weight of a slab of stone. WebGranite countertop weight calculator - There are a lot of Granite countertop weight calculator that are available online. document.calculator.imgunits.src="https://www.artfiberglass.com/calc/images/kilo.jpg" Retaining Wall Block Estimator / Calculator, Hotpoint Dishwasher Door Wont Open (Easy Fix), How to Fix LG Tablet Not Connecting to Wi-Fi. document.calculator.qty.value="1"; alert("You must enter a value for each dimension. Which is Heavier: Granite or Quartz Countertops? WebGranite countertop weight calculator - We'll provide some tips to help you select the best Granite countertop weight calculator for your needs. The important thing is to keep trying and to never give up. if(unit=="0") * Put in the total quantity or just leave the Stone can either be a single slab or individual stone. var Units=new Array(4); As an affiliate of retailers(like Amazon), we earn from qualifying purchases. WebWeight Calculator Marble * Granite * Stone * Miscellaneous MATERIAL tile and slabs weight calculation Instructions for using the Weight Calculator:. density of granite, solid is equal to 2 691 kg/m. Otherwise, you might end up with significant waste or an undesirable section on your countertop. Will your existing cabinets support granite? /*Rounding really really small pounds*/ document.calculator.img2.src="https://www.artfiberglass.com/calc/images/length.jpg"; return false; if(unit=="0") WebStone Weight Calculator. The price may be higher for complex jobs or if the contractor must travel to do the job. Template: The contractor will make a template before fabricating the granite pieces. The density of granite is 2700 kg/m (see the densities table below). The volume we want to convert is 1 cubic meter. So, 1 cubic meter of granite equals 2.7 10 3 kilograms Kg. Note: some values may be rounded. Having trouble with math? document.calculator.img2.src="https://www.artfiberglass.com/calc/images/length.jpg"; As mentioned above, you can expect to pay somewhere in the range of $35 to $75 per square foot for granite slabs. It explains things thoroughly and breaks it down into simpler components. Enter the granite length (ft), the granite width (ft), and the granite thickness (in) into the Granite Weight Calculator. density of granite, solid is equal to 2 691 kg/m. Granite that is cut into a thickness of is about 13lbs per square foot, where granite cut at 1 thickness is about 18lbs per square foot. A good granite countertop calculator will also consider other factors that might be part of the project. In other words, you must put in the correct numbers to get accurate results. 20 sq ft X 18 pounds per square ft. = 360 pounds. per square foot. WeightTemp=Weight*10000; * Select the shape or profile of the stone material for weight calculation: Tile, Column, Countertops,Statue,Hexagon, Ball,Paving Stone etc. If the contractor makes a mistake, are you responsible for purchasing a new slab? You may find that you are more responsible for accidents and mistakes than you realize. * The weight value will be calculated when you Will your existing cabinets support granite? For example, a 45-square- Solve Now. WebGranite block weight calculator - Enter the granite length (ft), the granite width (ft), and the granite thickness (in) into the Granite Weight Calculator. }); density of granite, solid is equal to 2 691 kg/m. var img2; Name * First Last. Granite Countertop Cost Calculator Assumptions: Our calculator is based on a variety of assumptions which include: Cost per granite level. document.calculator.imgshape.src="https://www.artfiberglass.com/calc/images/hex-af.jpg"; Reviewing this information with the contractor is also essential because each contractor will have a different method of including these items in the estimate. How do you calculate the installation cost if you use a contractor for the job? First, measure the length, width, and thickness of the slab in inches. Our calculator will then use a simple mathematical formula to calculate the weight of the slab in pounds. WebGravel Calculator The following calculator helps estimate the amount of gravel needed to cover an area based on the density and desired depth of the gravel. WebGranite slab weight calculator. Otherwise, you will need to use other online tools to calculate the area of a triangle, circle, or another shape. document.calculator.img3.src="https://www.artfiberglass.com/calc/images/notreq.jpg"; if(Shape=="4")/*Octagon Points*/ I enjoy dealing with mathematical problems because they give me a chance to use my logical and analytical skills. Calculating the Weight of Stone Measure a headstone's height, length, and width. WebStone Weight Calculator. /*Converting to kilograms*/ var MatlSelect; * Fill in the dimensions of your material referring document.calculator.units2.selectedIndex="3"; The calculator will evaluate the. Email * Phone * How may we help you? Phone: 1 541-359-4708, Weight Calculator by the weight calculator are for estimate reference only. Countertops must be disposed of properly, and this could include local or state regulations for the disposal of certain materials. document.calculator.Submit.value="Calculate"; Name * First Last. } WebTags: Stone Weight, Stone Calculation, Granite Weight Calculator, Stone Weight Quartz Countertop Weight Calculator,Basalt Weight Calculator,Quartz Slabs More ways to get app. Some jobs may be a much lower percentage of waste, and, in some cases, it could be 50% or more. } Mistakes: It is essential to discuss the possibility of errors with a fabricator. An average size granite slab that might go into your kitchen can weigh anywhere between 700 and calculation, * You can also select CUSTOM in material selection Values[0]=DensityConverter(Values[0],Units[0]); }. document.calculator.units2.selectedIndex="3"; This post was first published on 2023-01-15. "); Math Assignments bluestone, limestone, and sandstone. You can request that this number be on a separate line. document.calculator.density.value=Converted; WeightTemp2=Math.round(WeightTemp2); alert("You must enter a value for each dimension. The calculator will evaluate the. WebGranite countertop weight calculator - How Much Does Granite Weigh? document.calculator.imgshape.src="https://www.artfiberglass.com/calc/images/sheet.jpg"; } density of granite, solid is equal to 2 691 value=(value*2.54)*36; * density of granite, solid is equal to 2 691 kg/m. If you're looking for a fun way to teach your kids math, try Decide math. document.calculator.weight2.value=""; Average Installation Costs For those who struggle with math, equations can seem like an impossible task. Weight=(Values[0] * 0.64952 * Values[1] * Values[1] * Values[2] * Values[4]); WeightTemp2=WeightTemp2/10000; function UnitConverter(value,unit){ updateTotals(); If It was possible , I would've given it 100 stars. /*Rounding kilograms*/ "); It multiplies the length and width of the coverage area to get the square footage. If you want to improve your academic performance, try studying with a friend. document.calculator.density.value="2.750"; MatlSelect=document.calculator.material.options[document.calculator.material.selectedIndex].value; inch thick. Included in the labor is also cutting out sections for sinks and faucets. per square foot. Contact Us. Stone Weight Calculator Granite, solid weighs 2.691 gram per cubic centimeter or 2 691 kilogram per cubic meter, i.e. Granite weights approximately 20 lbs. Marble: Marble is even heavier than granite. When it comes to math, there is no such thing as a stupid question. Granite: A 1/2-inch-thick slab of granite weighs 6.5 pounds per square foot, making a 30-square-foot slab of granite 195 pounds. 20 sq ft X 18 pounds per square ft. = 360 pounds. } } WebEnter the granite length (ft), the granite width (ft), and the granite thickness (in) into the Granite Weight Calculator. Solve math problem; 24/7 help; Enhance your theoretical performance; t3 = jQuery("#l3").val() * jQuery("#w3").val(); ReadyToDIY is the owner of this article. The table below displays the /*Converting Weight2 to pounds*/ jQuery("#t4").text(Math.round(t4)+" SF"); I'm a homeowner and I like to do things myself. WebGranite, solid volume to weight conversion. document.calculator.img2.src="https://www.artfiberglass.com/calc/images/width.jpg"; Use this calculator to estimate the weight of granite, basalt, bluestone, limestone, and sandstone. Granite slabs come in standard sizes between 9 and 10 feet long and 5 and 6 feet wide. Why? jQuery("#t1").text(Math.round(t1)+" SF"); How Much Does Granite Weigh? Density=document.calculator.material.options[document.calculator.material.selectedIndex].value; Weight Calculator Marble * Granite * Stone * Miscellaneous MATERIAL tile and slabs weight calculation Instructions for using the Weight Calculator:. Suppliers receive between 8 and 10 slabs per bundle, all cut from the same block of granite to ensure uniformity. WebGranite countertop weight calculator - We'll provide some tips to help you select the best Granite countertop weight calculator for your needs. function CheckVal(val0,val1,val2,val3,val4){ Discuss with the fabricator how much waste you might have in your project. value=(value*2.54)*12; /*Rounding really really small grams*/ Get Help Selecting the Right Stone. WebGranite countertop weight calculator - How Much Does Granite Weigh? Calculating the installation cost of a granite countertop is a complex process. document.calculator.units2.selectedIndex="3"; document.calculator.Submit.value="Calculate"; if(unit=="3") A small granite countertop can weigh as little as 30 to 80 pounds (13.6 to 36.2 kg). A larger countertop in a big kitchen can weigh hundreds of pounds. Before fitting a countertop, its possible to calculate how heavy it will be once you know its thickness (3/4 inch or 1 1/4 inch) and its width and length. } Calculate Slab Weight. var WeightTemp2=new Number(0); value=value*27.67783; You can buy the entire slab, and the waste is yours, or you can pay the price for the necessary square footage. kilogram per square centimeter (kg/cm) is a metric measurement unit of surface or areal density. An application is not enough to get the job you want. document.calculator.imgshape.src="https://www.artfiberglass.com/calc/images/hex-points.jpg"; (C) http://www.calculator.net all right reserved. Determine mathematic questions. function gObj(obj) {var theObj;if(document.all){if(typeof obj=="string"){return document.all(obj);}else{return obj.style;}}if(document.getElementById){if(typeof obj=="string"){return document.getElementById(obj);}else{return obj.style;}}return null;}function trimAll(sString){while (sString.substring(0,1) == ' '){sString = sString.substring(1, sString.length);}while (sString.substring(sString.length-1, sString.length) == ' '){sString = sString.substring(0,sString.length-1);} return sString;} function showDebugInfo(){}function r(A){if(A=="10x"||A=="log"||A=="ex"||A=="ln"||A=="sin"||A=="asin"||A=="cos"||A=="acos"||A=="tan"||A=="atan"||A=="e"||A=="pi"||A=="n!"||A=="x2"||A=="1/x"||A=="swap"||A=="x3"||A=="3x"||A=="RND"||A=="M-"||A=="qc"||A=="MC"||A=="MR"||A=="MS"||A=="M+"||A=="sqrt"||A=="pc"){func(A)}else{if(A==1||A==2||A==3||A==4||A==5||A==6||A==7||A==8||A==9||A==0){numInput(A)}else{if(A=="pow"||A=="apow"||A=="+"||A=="-"||A=="*"||A=="/"){opt(A)}else{if(A=="("){popen()}else{if(A==")"){pclose()}else{if(A=="EXP"){exp()}else{if(A==". There are often many moving parts that may not be evident at first. return false; A standard slab has a roughly 45 square foot surface, but the finished countertop will be slightly less after cutting and installation. /* function DensityConverter(value,unit){ Granite is a beautiful stone, and choosing a suitable slab will make a difference in the calculation. The table below displays the standard weight of granite based upon slab size. Will your existing cabinets support granite? In Imperial or US customary measurement if(Shape=="5")/*Ball Solid*/ This field is for validation purposes and should be left unchanged. Copyright article owner is ReadyToDiy.com for this article. We recommend to always consult an expert before moving forward with any type of project or repair. *****************************************/ if(unit=="2") return value; cap 10 to ml conversion table, cap 10 to ml unit converter or convert between all units of volume measurement. density of granite, solid is equal to 2 691 kg/m. However, with a little bit of practice, anyone can learn to solve them. If you're looking for fast, expert tutoring, you've come to the right place! * Choose a material you wish to obtain weight document.calculator.weight2.value=WeightTemp2; document.calculator.img3.src="https://www.artfiberglass.com/calc/images/notreq.jpg"; Granite countertops can bring a lot of benefits to your home. WebCalculate the weight of one square foot of the tile you plan to use. value=value*2.54; WebCalculate weight of granite countertop - 20 sq ft X 18 pounds per square ft. = 360 pounds. Wolfram alpha is great too but it kept giving me the wrong solution to a differentiation problem, im definitely gonna get the membership which breaks down the problem to help you understand why you get your problems wrong. Otherwise, you can crunch the numbers on your own. A granite countertop cost estimator will consider a few factors when calculating the cost. * Stone * Miscellaneous, Important notice: all weight calculation results WebGranite boulder weight calculator - Granite boulder weight calculator can be found online or in math books. Usually, the minimum average size of a granite slab is 105 x 54. document.calculator.weight.value=""; Thicknesses can also be 3/4 or 1-1/4. 8 to 10 granite document.calculator.img2.src="https://www.artfiberglass.com/calc/images/length.jpg"; The table below displays the standard weight of granite based upon slab size. I write out about what Ive learned while researching DIY projectsread more about us. The granite slabs are packed in bundles of approximately 400 to 450 square feet. This will help you better understand the problem and how to solve it. * Select the shape or profile of the stone material for weight calculation: Tile, Column, Countertops,Statue,Hexagon, Ball,Paving Stone etc. The industry average for waste is 30%. alert("You must enter values for both Density and Quantity to calculate total weight. This field is for validation purposes and should be left unchanged. if(Shape=="1")/*Square Column*/ Same way you can calculate the quantity for granite, as the granite are cheaper compare to that of marble - they are little safe for mistakes in quantity. If we were to break the cross in two the middle would be, How Much Does Granite Weigh? Some odd shapes include round, triangle, or even square countertops that are part of an island or other area of the home. An average slab weighs about 1000 lbs. } The problem is, regardless of which option you choose, you will be paying a similar price. This results in An average slab weighs about 1000 lbs. WebTo calculate the weight of the slab, use the following formula: Weight (lbs) = (Length (in) x Width (in) x Thickness (in) x Density (lbs/ft^3)) / 12 For example, if you have a granite slab What if they drilled the faucet holes in the wrong location? The table below displays the standard weight of granite based upon slab size. The general cost for labor to install a granite countertop is $70 per man-hour. * Values[0]=document.calculator.density.value; Units[0]=0; Values[2]=document.calculator.value2.value; if(unit=="3") } document.calculator.img1.src="https://www.artfiberglass.com/calc/images/outer.jpg"; Thats why, in this guide, were going to break down everything that you need to know about how much granite countertops weigh. document.calculator.value3.value=""; 0086-592-3010005. material and wish to obtain the accurate instead document.calculator.weight2.value=""; Granite weights document.calculator.imgshape.src="https://www.artfiberglass.com/calc/images/round.jpg"; calculation from the Material Selection Box. Will your existing cabinets support granite? var Units; Values[1]=UnitConverter(Values[1],Units[1]); Calculating the Weight of Stone Measure a headstone's height, length, and width. if(MatlSelect>"0"){ } if(Weight2<"0.0001"){ Quite a few of those issues could happen when installing a granite countertop. Granite Remnants Remnants are the leftover pieces of granite from slabs that have been shaped for countertops. Weight=(Values[0] * 0.5236 * Values[1] * Values[1] * Values[1] * Values[4]); inch thick. value=value*0.0160184; function updateTotals() { An average slab weighs about 1000 lbs. WebThe weight of a granite countertop depends on its size and the thickness of the granite used to create it. I kept getting an 83. WeightTemp2=Math.round(WeightTemp2); document.calculator.img1.src="https://www.artfiberglass.com/calc/images/diameter.jpg"; Our website is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. That waste represents a considerable portion of any slab. WeightTemp=Math.round(WeightTemp); A slab of quartzite would be closer to 1200 It doesn't just show you the answer but also shows you step by step instructions on how to solve and if one step isn't making sense you can tap on it and it expands and give a more in depth explanation on how exactly they got to that step. per square foot. Each bundle includes approx. WebMeasureSquares Countertop Cost Calculator is a web-based estimating tool that calculates square footage areas and generates a cost estimate with detailed edge finishes, splash and cutout options. The formula takes into account the length, width, thickness, and density of the slab. density of granite, solid is equal to 2 691 kg/m. if(unit=="3") WebStone Weight Calculator What is the weight of granite? To solve a math equation, you need to find the value of the variable that makes the equation true. return value; Converted=DensityConverter(Density,Units); How Much Does Granite Weigh Per Square Foot? It's a great way to engage them in the subject and help them learn while they're having fun. * If you know the exact density of a specific Plus, you dont need to be an expert in mathematics to use it. Area to Cover: Use total area Rectangle Circle Total Area: Depth of Gravel: Gravel Density: Price (optional): Additionally, its always recommended to verify the weight with the supplier or the manufacturer. Values[1]=document.calculator.value1.value; function Default(){ The calculator will evaluate the. A slab of quartzite would be closer to 1200. In Imperial or document.calculator.imgshape.src="https://www.artfiberglass.com/calc/images/square.jpg"; function Density(){ Removal: If you have an existing countertop, the contractor will charge extra for removing it. jQuery("#t3").text(Math.round(t3)+" SF"); } WebUpdated October 5, 2022. How Much Does Granite Weigh? value=value*1; value at 1 if you wish to make unit weight calculation. document.calculator.img1.src="https://www.artfiberglass.com/calc/images/diameter.jpg"; document.calculator.value2.value=""; if(unit=="meter") inch thick slabs, Less than 13. math is the study of numbers, shapes, and patterns. * The RESET button will change all the settings Average satisfaction rating 4.7/5 WebWeight of Granite: How Much Do Slabs Weigh? An average slab weighs about 1000 lbs. if((selShape=="0"||selShape=="6")&&(val2=="")){ Cutting and installing granite is a specialized skill. * Stone * Miscellaneous. At 24/7 Customer Support, we are always here to help you with whatever you need. document.calculator.density.value=MatlSelect; document.calculator.units3.selectedIndex="6"; Waste: Since granite is a natural stone, there will be variations in the color and design, even in a single slab. So below are the way to calculate the quantity; 1.