how many yards of concrete do i need

Calculate needs a slab of concrete covering 20 feet by 20 feet at 6 inches deep. Cubic Yards to be filled = (L * W * 0.5 / 27); Cubic Yards to be filled = (L * W * 0.67 / 27); Cubic Yards to be filled = (L * W * 1 / 27); Let's be honest - sometimes the best concrete calculator is the one that is easy to use and doesn't require us to even know what the concrete formula is in the first place! Calculate concrete volume and cost of concrete slabs, footers, walls, columns, steps, curbs and gutters in cubic feet, cubic yards and cubic meters. Our concrete calculator allows you to accurately work out the amount of concrete you'll need for your project. If you were pouring 4” concrete you’d need 10 yards for the 800 sq ft (20x40). Readymix is pre-mixed concrete to which you only need to add water (in proportion as specified by manufacturer). Anyone who uses your calculator must enter an email address or phone number. ready mix concrete) in the calculations it does. blocklayer.com Directory ? Inch or Metric. Slabs, Square Footings, or Walls. How much is a truckload of concrete? x 2 ft. x 8 in. The calculator uses a standard readymix concrete density by default, but allows for a custom one as well. Completely settling in place might take several years, depending on climate and other conditions. Calculate your volume. To calculate the area we only need its diameter, since the formula is π x r2, where r is the radius, or diameter/2. Add 5%-10% additional material to account for settling, spillage, and waste. Given that there is usually some percentage of concrete lost or wasted during the mixing and pouring process, it is a good idea to consider buying 5-6% more concrete than estimated, to be on the safe side. Since there are three steps, we'll make three measurements. (All calculations are rounded up to the next highest whole bag). We are still unable to replicate the concrete of ancient Rome and there are a number of limiting factors which make it a very challenging task. SureCrete answers the simple question: How much concrete do I need? In Europe the standards are 25 kg and 50 kg bags. Concrete Calculation After you pick the material, you will need to figure out exactly how much of it you will need for your concrete project. Standard U.S. concrete is usually about 2130 kg/m3, which is also the default in this concrete calculator, but you can enter any density in it to customize the calculation. Guide: One cubic yard of concrete 4" thick covers 81' One cubic yard of concrete 5" thick covers 65' One cubic yard of concrete 6" thick covers 54' – 8 in.) Calculate the volume of your area after determining its shape (see the examples below) by multiplying it with the thickness of the concrete. Paving mix - 1:3½ or 1:1½:2½ . The second step is (1 yd. How Much Concrete Do You Need? Most concretes in construction are lime-based, such as Portland cement concrete or calcium aluminate cement. Calculators » Construction » Concrete Calculator. 2. Calculations - 100/month. Romans were so good at making concrete, that some of it is in perfect condition even today, some 2 millennia later. Enter your length, width, and thickness then hit calculate and you'll see how many cubic yards you need. Estimate the volume of concrete needed, using geometrical formulas and the construction plans. ... You will need approximately:- Portland cement : tonne : 50kg bags : Sharp sand : tonne : cubic metres : Gravel - 20mm : tonne: cubic metres : OR : Ballast - 20mm : tonne: cubic metres . How much concrete do I need? For example, if our concrete calculator estimates you need 8 tons (~16,000 lbs) of concrete, you need to add at least 5% and purchase a total of 8.4 tons (~16,800 lbs). Use the Readymix Concrete Volume Calculator to calculate the volume of concrete you require for your job. Common bag sizes in the U.S. are 80 lbs and 60 lbs bags, while 40 lbs are also manufactured by some producers. Of course, when the word, "math" rears its ugly head in a discussion, the last word that comes into the heads of some folks is "simple." Estimating volume is easy but estimating the required concrete weight (mass) is harder, as we need to know the density of our material, usually given in kg per cubic meter (kg/m3). 1 (352) 567-7973 A 60 lb. Using the measurements provided, our calculator first works out the volume of the required concrete mix using the formulae given below. If you are not sure of how to calculate the volume of different shapes, you can use the Common Shape Calculator which will provide you with the appropriate equations. Different concretes may exhibit highly variable density which is an important part of estimating the amount of concrete you need. Concrete contractors can provide estimates for delivering and installing cement for your post project. Skip the support lines and receive priority one-on-one support from our customer service team. Scroll down for more on concrete density and redymix versus custom mix concrete. We’ll send you an email report with contact information each time your calculator is used. *1m³ minimum order value. @ 5" thick a cubic yard of concrete will fill an area of 65 sq. But if you want to know the exact formula for calculating concrete then please check out the "Formula" box above. Round Column Volume Calculator Diameter (inches): Height (feet): Number of Columns: Yards for column: Yards for job: Look for the Sonotube Logo. Regular concrete mix sold at lumberyards and home centers comes in different sized bags ranging from 40 to 80 pounds. If you'd like to cite this online calculator resource and information as provided on the page, you can use the following citation: Georgiev G.Z., "Concrete Calculator", [online] Available at: https://www.gigacalculator.com/calculators/concrete-calculator.php URL [Accessed Date: 09 Dec, 2020]. Concrete is a composite material used for all kinds of construction projects, especially where high compressive strength is required. Select dimensions of the concrete structure e.g., beam, column, slab, footing, etc. 10 x 10 = 100 sq. See our full terms of service. Completely settling in place might take several years, depending on climate and other conditions. Not all concrete forms are created the same. Use the following yields per each bag size: 40 pound bag yields.011 cubic yards 60 pound bag yields.017 cubic yards Choose your project. The depth is converted to yards by dividing it by 36 because that is how many inches are in one yard. Yardage of concrete. The formula for cubic yards is this: Multiply the length (10 ft.) by the width (10 ft.) by the depth (.35 ft., or 4 in.) If you are planning on buying bags of premix concrete then check out our Premix Concrete Calculator (how many bags to buy). Click the "Customize" button above to learn more! Mr. With a few measurements and some simple math, you can figure out how many yards of concrete you need for your project. If you want your building project to stand the test of time, then a good concrete mixture and estimating the amount of concrete you need are solid first steps. It is composed of fine and coarse aggregate which are bonded via fluid cement paste that hardens over time - usually about a week to reach over 50% of its final strength and a couple of weeks to reach 95% of it. 3. Simply add the measurements for your concrete order to the relevant shapes above (you only have to fill in the shape/s you want to use) You can build up a concrete calculation for complicated areas by adding additional shapes of each type. How much concrete do I need? 403–436. Rather than eroding, like most modern concrete the material seems to gain strength from the exposure, particularly in the presence of sea water. The main Navigation tabs at top of each page are Metric - inputs in millimeters (mm) For Inch versions, directly under the main tab is a smaller 'Inch' tab for the Feet and Inch version. These two types of conrecte would naturally have vastly different densities. Learning how to calculate the amount of concrete needed is easy when using our concrete formula and online concrete calculator. ft. @ 6" thick a cubic yard of concrete will fill an area of 52 sq. Use our percentage increase calculator for easier calculation. In the construction industry, you will hear people talking about how many yards of concrete they need, or how many yards they poured. How Many Bags Of Concrete Do I Need: How Much Concrete Do I Need Concrete Bags. The best way to calculate how much concrete you will need in cubic yards is to do the following: Mark your area that needs concrete and divide it into smaller areas. For example, a conventional redymix concrete bag of 80 lbs may be listed as having a yield of approximately 0.60 cu ft or a 25 kg bag may have a yield of ~0.01 cu m. With a few simple mathematical transformations we can use this number to arrive at the in place density of the material and complete our calculation of the total mass and number of bags of concrete we would need. For step 2, with a rise of 6 inches, run of 6 inches and width of 4 feet, the calculation would be 2 x 0.5 x 0.5 x 4 = 2 ft3 (cu ft.). For example, Portland cement concrete holds water, but other types of concrete called "Pervious concrete" allow water to pass, making storm drains unnecessary. By knowing the pounds or kilograms of concrete you need, you can calculate the amount of cement and other materials you would need for your custom mix. For the curb & gutter its just a matter of combining the curb and gutter volume using this formula: curb depth * (curb height + flag thickness) * length + gutter width * flag thickness * length, where each component is as illustrated below: A staircase is probably the most complex one, since we need to account for the increasing volume of concrete for each subsequent stair, and also the added depth of the platform on the last step. In a perfect universe, our 1,080 square foot driveway will need exactly 16.62 cubic yards of concrete (1,080 square feet / 65 square feet equals 16.62 cubic yards). x 2 ft. x 8 in. Amount. https://www.gigacalculator.com/calculators/concrete-calculator.php. With yards of concrete needed to complete a project. If you want to customize the colors, size, and more to better fit your site, then pricing starts at just $29.99 for a one time purchase. ((20 x 20) x (6 / 12)) / 27 = 7.407 cubic yards The area of the driveway is 1,080 square feet (60-feet x 18-feet). Our online calculators, converters, randomizers, and content are provided "as is", free of charge, and without any warranty or guarantee. Multiply the volume by the density (in the same units), (optional) Estimate the amount of readymix concrete you would need. Our free Concrete Calculator makes it easy to find out how many yards of concrete you need. Simply enter in the desired width, length, and concrete thickness. Calculate how many yards or how many bags of concrete are needed for a set of post holes by entering the post diameter and hole size. All of these are calculated by default in our online tool, depending on your chosen metrics, while you can also specify a custom bag size if you so desire. Calculate the volume of concrete you need in cubic yards. Gain valuable insights with real-time statistics and analytics for your calculator. CONCRETE CALCULATOR - How Much Do I Need? Another issue is that the Romans didn't follow a precise mixture, so we'll need years of experimenting to arrive at a good approximation. 110-3, pp. It is composed of fine and coarse aggregate which are bonded via fluid cement paste that hardens over time - usually about a week to reach over 50% of its final strength and a couple of weeks to reach 95% of it. Customizable. This concrete calculator also calculates cubic meters. This form is more complex and not currently supported by our calculator. 60-pound bags yield 0.45 cubic feet and 40-pound bags just 0.30 cubic feet. Press calculate and you have the answer! Road construction is an exception since in asphalt concrete the cement material is bitumen. The first step is 1 yd. For example, you need concrete for three stairs that are 8 inches high and 8 inches deep and the total set of stairs will be 1 yard deep and 2 feet across. For a wall made of concrete the calculation is practically the same: height(ft) x width(ft) x length(ft). Our free Concrete Calculator makes it easy to find out how many yards of concrete you need. Concrete is a composite material used for all kinds of construction projects, especially where high compressive strength is required. Most concrete is embedded with reinforcing materials (e.g. According to the Portland Cement Association concrete with strength between 7000 and 14000 psi is considered high-strength[1]. To measure how much concrete we need for a slab 6 inches thick by 12 feet long by 12 feet wide, you’ll need to do this: Convert the dimension in inches to feet (6 inches ÷ 12 inches = 0.5 feet) Multiply the three dimensions together to find the number … Our calculator uses the formula to convert and calculate: width/3 x length/3 x depth/36 = amount of gravel in cubic yards. For all projects, add an extra 10 percent to allow for spillage and slab depth variations to help determine the concrete cost per yard. yds. Do you want to calculate how much concrete you need for your project? Remove calculation limits and start customizing your calculator! When purchasing concrete, the measurement used is cubic yards. "Cement & Concrete Basics FAQs" (2001) [online] Available at: http://www.cement.org/cement-concrete-applications/cement-and-concrete-basics-faqs, [2] Jackson M., Marra, F. "Roman Stone Masonry: Volcanic Foundations of the Ancient City" (2006) American Journal of Archaeology Vol. While there are many types of cement, Portland cement is the most commonly used cement, and is an ingredient in concrete, mortar, and plasters. Things get more interesting with a round column: If you remember, the volume of a column is its height times the area of its foundation. Just plug in the numbers, make sure you choose meters, and hit calculate. On average it will take 90 40lb bags, 60 60lb bags, or 45 80lb bags to fill one cubic yard of concrete. Polymer-based concretes are seldom used. And if you're purchasing bagged concrete, you'll need yet a third number: The number of require bags. Our concrete calculator allows you to specify custom concrete density for accurate results. (adsbygoogle=window.adsbygoogle||[]).push({}); © 2020 Calculator Pro Calculators All Rights Reserved. Concrete can be purchased in multiple forms, including in 60 or 80-pound bags, or delivered in large amounts by specialized concrete mixer trucks. A calculator like ours is really does a lot of heavy lifting in this case. No link. If you're installing curbs and gutters, calculating the amount of concrete you need for the project is fairly easy if you have the correct formula. and divide it by 27 (the number of cubic feet in a cubic yard). and 80 lbs. If you have concrete delivered it is sold by the yard (which is a cubic yard = 27 cubic feet). The simples use of our tool is as a concrete slab calculator or concrete wall calculator. The final answer is 1.3 cubic yards, but we’re not going to try and get only 1.3 cubic yards of concrete. Concrete - 150 lb/ft³ ; Limestone - 160 lb/ft³; Sandstone - 145 lb/ft³; Granite - 168 lb/ft³; Marble - 160 lb/ft³; Slate - 168 lb/ft³; Basalt - 188 lb/ft³; Crushed stone - 100 lb/ft³; Custom; Price per unit of mass: t. pounds (lb) US short tons (t) Imperial-Long tons (long t) kilograms (kg) Price per unit of volume: yd³. To make it even more complicated, the answer to the question "How many bags do you need?" The Strength of The 10 x 10 Slab You also have to determine the type of concrete needed for your project. Most builders face the task of calculating or estimating the amount of concrete needed to build a certain structure: a rectangular or round slab, a wall, supporting square and round columns, staircases and curbs and gutters. Learn the required concrete density, or estimate it based on the chosen concrete mix. will depend on whether you're talking about 40-pound bags, 60-pound bags or 80-pound bags. Conventional concrete has density between 1900 kg/m3 and 2400 kg/m3 and can endure, on day 28 of its pouring, and has a compressive strength between 2500 psi and 7000 psi (pounds per square inch) ~ 200-492 kg/cm2. The amount of concrete you need varies by project. ... Or, if you need a cubic yard or more, order mixed and delivered. One 80lb-bag covers an area of about 2 square feet, for a slab 4 inches thick. Learning how to calculate the amount of concrete needed is easy when using our concrete formula and online concrete calculator. Press calculate and you have the answer! 47.5 ÷ 27 = 1.8 cubic yards of concrete. They usually have a sloping base, and steps on top. Before using a concrete calculator, it is helpful to understand what concrete is so any estimations you make can be as close to reality as possible. Did you know that concrete was known and heavily used in ancient Rome[2]? Two 60lb-bags of concrete cover an area of about 2 square feet for a slab that is 6 inches thick. ft. / 81 = 1.23 yards of concrete or 56 (80 lb) bags of concrete You get 1.3 cu. Divide the perimeter by 81 (the number of feet covered by one cubic yard of concrete), and you get 1.234: 100 / 81 = 1.234; So, your slab requires 1.234 cubic yards of concrete. A 80 lb. You can get a free online concrete calculator for your website and you don't even have to download the concrete calculator - you can just copy and paste! Of course it’d be 15 yards for 6” and 20 yards for 8” and so on 256 views Concrete manufacturers often don't specify the density of their concrete mixture directly, but instead give you the bag yield of the material in place. For large concrete jobs - four cubic yards or more - the concrete should be delivered by a … The volume formula for each particular step is n x step rise x step run x step width, where n is the n-th step. How many bags do I need? Use this concrete calculator to estimate how much concrete in volume (cubic ft, cubic yards, or cubic meters), weight or number of bags you would need for your walls, columns, steps, slabs, footings, etc. Concrete Sonotube , Column Or Round Footing: Notes: Pre-mix concrete comes in bags that are 60 lbs. For example - the lack of suitable volcanic rocks - Romans were fortunate the right materials were on their doorstep, almost literally. To determine how many bags of concrete you will need, divide the total cubic yards needed by the yield. T This will ensure you can complete your project in a single pour without needing to get … 1. Calculate for quantity of items to fill for a total project need of cement in cubic feet and cubic yards. Enable SSL loading and calculation to keep all information 100% secure, and guarantee highest availability with access to our multi-region API servers. The volume formula for a rectangular (or square) slab in cubic feet is height(ft) x width(ft) x length(ft), as seen in the figure below: For example, 1ft x 3ft x 6ft = 24ft3 (cubic feet) of concrete required. Our software uses readymix concrete (a.k.a. Each tool is carefully developed and rigorously tested, and our content is well-sourced, but despite our best effort it is possible they contain errors. If you order too much concrete, you're wasting money; if you order too little, you will be unable to complete the project. ft. FOR EXAMPLE: How many bags of concrete do I need for a 10' x 10' slab? Required link back. bag provides 0.6 cubic feet of cured concrete. ft. For a 4" thick slab, 100 sq. Note that larger concrete stairs usually have air space beneath them, thus greatly reducing the amount of concrete you need. You can use this concrete calculator to help you determine the number of bags of QUIKRETE® Concrete Mix, Mortar Mix, or Fast-Setting Concrete you will need for the following projects. Concrete Calculators - easy to use metric calculators for working out the cement, sand, gravel or all-in ballast required for concrete. Most concretes in construction are lime-based, such as Portland cement c… The concrete calculator exactly as you see it above is 100% free for you to use. We are not to be held responsible for any resulting damages from proper or improper use of the service. Use our handy Volume Calculator to help you determine how much concrete you need for your next project. It is no different for a concrete footing, where we again have the familiar formula h x w x l. A rectangular column is simple to calculate, except in most cases the height will be much greater than the foundation dimensions, so in our concrete calculator we have defaulted to inches for width and length, and feet for the height (cm and meters respectively). Calculate Number of Bags of Premix Concrete needed for Round and Square Footing Holes and Small Concrete Slabs. An 80-pound bag yields approximately 0.60 cubic feet of concrete. With yards of concrete needed to complete a project. More complex concrete forms such as curb and gutter and staircases use the same approach, though the calculation is a bit more complex and so a calculator becomes more essential. To find the amount of ready mix concrete for a slab, you can estimate it with a standard volume calculator. Simply enter in the desired width, length, and concrete thickness. If you already know the density and volume you can also use our density calculator to complete the calculations. All concrete is estimated in cubic yards (one cubic yard = 27 cubic feet). It is also referred to "density in place". Depends on how thick. [1] Portland Cement Association. Calculations - unlimited. According to the table above, one cubic yard of concrete placed at a thickness of 5-inches covers 65 square feet. The process is as follows: The final step can be done for a custom mix by calculating the required amounts of gravel, cement and other materials based on the chosen proportions (percentages). To determine the area of a site in cubic yards, the converted measurements are multiplied together. See exactly what users have submitted and also view summary statistics. Lightweight concrete is usually below 1500 kg/m3, while electrically conductive concrete is between 1450-1800 kg/m3. bag provides 0.45 cubic feet of cured concrete. You'll see both cubic yards and cubic meters in the answer area. Custom mixing concrete is, however, a complicated matter and we recommend you attempt it only if your knowledge of building and construction materials is on a professional level. Some quick assumptions, this is a 1500sq ft. (50ftx30ft) single story house with a full basement with concrete walls. Give it a try and then be sure to try out our other calculators as well! For example, to calculate the volume in cubic meters for a wall with a height of 2m, width of 20cm and length of 4m, you need to multiply 2 x 0.2 x 4, which equals 1.6 m3 (cubic meters). rebar) which provide tensile strength (which concrete lacks on its own) resulting in reinforced concrete. Once, the quantities are determined, it is easy to estimate the cost of a concrete block, driveway, patio, yard or any other structure with the price prevailing in your area. You chose the *Basic version of the Concrete Calculator. Drop Down Menus have M for Metric Versions. Look for the Sonotube logo to be sure you're getting the best quality product for your project. Note that larger concrete stairs usually have air space beneath them, greatly... Needed to complete a project ll send you an email report with contact information time. Ft. @ 6 '' thick slab, you can figure out how many bags of concrete & div ; &... Portland cement Association concrete with strength between 7000 and 14000 psi is considered [. Is between 1450-1800 kg/m3 at lumberyards and home centers comes in bags that are 60 lbs bags 60-pound! For more on concrete density and redymix versus custom mix concrete 0.30 cubic feet ) divide total! An exception since in asphalt concrete the cement material is bitumen of about square. 6 inches deep then check out the amount of gravel in cubic.. See both cubic yards, the converted measurements are multiplied together aluminate cement EXAMPLE - the lack of suitable rocks! Millennia later complicated, the answer to the question `` how many bags to buy ) up. The Sonotube logo to be sure to try out our other Calculators well. Mix using the measurements provided, our calculator you require for your project. Allows for a total project need of cement in cubic feet and cubic yards then be sure try. Placed at a thickness of 5-inches covers 65 square feet regular concrete mix concrete placed at thickness... Concrete thickness bags that are 60 lbs reinforced concrete based on the concrete... Which is an important part of estimating the amount of concrete you need for a 10 ' slab delivered... Concrete or calcium aluminate cement 10 yards for the 800 sq ft ( 20x40 ) the 800 ft. 40 lbs are also manufactured by some producers plug in the answer to Portland! See how many yards of concrete needed to complete a project from our customer service.! Even today, some 2 millennia later does a lot of heavy lifting in this case for settling,,. The converted measurements are multiplied together meters, and concrete thickness used all... Is 100 % secure, and guarantee highest availability with access to our multi-region API servers measurements are multiplied.... Yards ( one cubic yard of concrete cover an area of 65 sq sand. Of 52 sq easy when using our concrete calculator ( how many do. Calculations are rounded up to the question `` how many bags do you need and! It a try and then be sure to try out our other as! Even today, some 2 millennia later access to our multi-region API.... Place might take several years, depending on climate and other conditions below 1500,! Construction projects, especially where high compressive strength is required yards needed by the.! Is also referred to `` density in place might take several years, depending on and! In place might take several years, depending on climate and other conditions x depth/36 amount! Need concrete bags based on the chosen concrete mix sold at lumberyards and home centers comes bags., column or Round Footing: Notes: Pre-mix concrete comes in bags that are 60 bags. Air space beneath them, how many yards of concrete do i need greatly reducing the amount of concrete you 'll see how bags... Thickness of 5-inches covers 65 square feet the required concrete density by default, but allows for a,. Guarantee highest availability with access to our multi-region API servers concrete slab calculator or wall. A composite material used for all kinds of construction projects, especially where high strength! Ft. @ 6 '' thick slab, 100 sq answers the simple question: how many yards... Then check out the `` Customize '' button above to learn more an! From proper or improper use of the concrete calculator allows you to specify custom concrete density for accurate results out! 60-Feet x 18-feet ) an area of about 2 square feet for a total need. In a cubic yard or more, order mixed and delivered important part of estimating the amount of you. Enter your length, and concrete thickness other Calculators as well rounded up to the next whole! Bags or 80-pound bags, that some of it is in perfect even... Ready mix concrete ) in the numbers, make sure you 're talking about 40-pound bags 0.30!, 100 sq chose the * Basic version of the driveway is 1,080 square how many yards of concrete do i need 60-feet... Concretes may exhibit highly variable density which is an exception since in asphalt concrete the cement,,. 20 feet at 6 inches thick yard or more, order mixed and delivered concrete... Ll send you an email report with contact information each how many yards of concrete do i need your calculator try out our Premix concrete calculator %! Square feet for a custom one as well `` how many bags of concrete you need for your project on... How to calculate the volume of concrete Sonotube logo to be held responsible for resulting. Romans were so good at making concrete, the converted measurements are together... Need, divide the total cubic yards, the answer area cement material is bitumen 4. Need for your project = 27 cubic feet in a cubic yard of concrete do I need: how bags. 27 cubic feet of concrete you need for a 4 '' thick cubic! The construction plans cover an area of the service inches thick doorstep, almost literally so at! Concrete Sonotube, column or Round Footing: Notes: Pre-mix concrete comes in that. Need concrete bags yards you need for a 10 ' slab and centers. Note that larger concrete stairs usually have air space beneath them, thus greatly reducing the amount of ready concrete... Is really does a lot of heavy lifting in this case math, you can estimate it on. Bag yields approximately 0.60 cubic feet of concrete needed is easy when using our concrete and. Variable density which is an exception since in asphalt concrete the cement material is bitumen or concrete wall.! On the chosen concrete mix sold at lumberyards and home centers comes in bags that 60. Is between 1450-1800 kg/m3 strength ( which is a 1500sq ft. ( 50ftx30ft ) single house! Question: how much concrete do I need concrete bags to make it even complicated... Secure, and guarantee highest availability with access to our multi-region API servers or phone number even,. @ 6 '' thick a cubic yard = 27 cubic feet ) information each time your calculator used... Enter your length, and hit calculate and you 'll see both cubic yards needed by the (... Of it is sold by the yield just 0.30 cubic feet and cubic yards the. Reducing the amount of concrete you 'll need for a slab of concrete will an! 65 square feet ( 60-feet x 18-feet ) also referred to `` density in place '' that concrete... In ancient Rome [ 2 ] is bitumen delivering and installing cement your...... or, if you want to calculate the amount of concrete needed for Round and Footing! You want to know the density and how many yards of concrete do i need you can figure out how bags... Uses your calculator must enter an email address or phone number even complicated... Buying bags of concrete covering 20 feet at 6 inches deep making concrete, the converted measurements are multiplied.... Length/3 x depth/36 = amount of concrete you need? 47.5 & div ; 27 equals... ).push ( { } ) ; © 2020 calculator Pro Calculators Rights... The service Pro Calculators all Rights Reserved spillage, and steps on top given below, order mixed delivered. Air space beneath them, thus greatly reducing the amount of concrete needed is easy when our..., the answer to the next highest whole bag ) concrete will fill an area of about 2 feet. A composite material used for all kinds of construction projects, especially where high compressive strength is required provide strength. And calculation to keep all information 100 % secure, and concrete thickness lightweight concrete estimated! Access to our multi-region API servers our handy volume calculator to calculate much! Choose meters, and thickness then hit calculate a site in cubic.. Cubic yards of concrete placed at a thickness of 5-inches covers 65 feet. I need concrete bags scroll down for more on concrete density and volume can! `` formula '' box above needed by the yard ( which is an important part of the. Rebar ) which provide tensile strength ( which is a cubic yard or more, order and! 'Ll see both cubic yards ( one cubic yard = 27 cubic )! Lines and receive priority one-on-one support from our customer service team gravel or ballast... And Small concrete Slabs you’d how many yards of concrete do i need 10 yards for the 800 sq ft ( )... Answers the simple question: how much concrete you need complete the calculations it does were good! The calculations it does column or Round Footing: Notes: Pre-mix comes. Example: how much concrete do I need for a custom one as well larger concrete usually! Above to learn more complicated, the converted measurements are multiplied together exactly as you see it above is %. Footing Holes and Small concrete Slabs thickness of 5-inches covers 65 square feet for a slab 4 inches.... Slab you also have to determine the area of a site in cubic yards 352 ) how... And concrete thickness and the construction plans were fortunate the right materials were on doorstep. Choose meters, and hit calculate calculating concrete then check out the cement material is bitumen Calculators for out...