60-pound bags yield 0.45 cubic feet and 40-pound bags just 0.30 cubic feet. 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. A 60 lb. Calculations - 100/month. 47.5 ÷ 27 = 1.8 cubic yards of concrete. (adsbygoogle=window.adsbygoogle||[]).push({}); © 2020 Calculator Pro Calculators All Rights Reserved. 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. ft. @ 6" thick a cubic yard of concrete will fill an area of 52 sq. You chose the *Basic version of the Concrete Calculator. To determine the area of a site in cubic yards, the converted measurements are multiplied together. 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. ... Or, if you need a cubic yard or more, order mixed and delivered. If you already know the density and volume you can also use our density calculator to complete the calculations. While there are many types of cement, Portland cement is the most commonly used cement, and is an ingredient in concrete, mortar, and plasters. Scroll down for more on concrete density and redymix versus custom mix concrete. With yards of concrete needed to complete a project. 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. Our online calculators, converters, randomizers, and content are provided "as is", free of charge, and without any warranty or guarantee. With a few measurements and some simple math, you can figure out how many yards of concrete you need for your project. ... 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 . 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' Use our percentage increase calculator for easier calculation. Not all concrete forms are created the same. T This will ensure you can complete your project in a single pour without needing to get â¦ To determine how many bags of concrete you will need, divide the total cubic yards needed by the yield. Simply enter in the desired width, length, and concrete thickness. Calculate your volume. They usually have a sloping base, and steps on top. 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]. The second step is (1 yd. The Strength of The 10 x 10 Slab You also have to determine the type of concrete needed for your project. Concrete is a composite material used for all kinds of construction projects, especially where high compressive strength is required. Give it a try and then be sure to try out our other calculators as well! 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. 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. Readymix is pre-mixed concrete to which you only need to add water (in proportion as specified by manufacturer). Do you want to calculate how much concrete you need for your project? Of course itâd be 15 yards for 6â and 20 yards for 8â and so on 256 views 1 (352) 567-7973 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.) 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. 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). Common bag sizes in the U.S. are 80 lbs and 60 lbs bags, while 40 lbs are also manufactured by some producers. Calculate Number of Bags of Premix Concrete needed for Round and Square Footing Holes and Small Concrete Slabs. How Much Concrete Do You Need? x 2 ft. x 8 in. 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. 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. To find the amount of ready mix concrete for a slab, you can estimate it with a standard volume calculator. See exactly what users have submitted and also view summary statistics. 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). will depend on whether you're talking about 40-pound bags, 60-pound bags or 80-pound bags. In Europe the standards are 25 kg and 50 kg bags. Slabs, Square Footings, or Walls. 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. blocklayer.com Directory ? Inch or Metric. But if you want to know the exact formula for calculating concrete then please check out the "Formula" box above. â 8 in.) 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. 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. 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. Use the following yields per each bag size: 40 pound bag yields.011 cubic yards 60 pound bag yields.017 cubic yards This form is more complex and not currently supported by our calculator. And if you're purchasing bagged concrete, you'll need yet a third number: The number of require bags. Polymer-based concretes are seldom used. 3. Learn the required concrete density, or estimate it based on the chosen concrete mix. Most concrete is embedded with reinforcing materials (e.g. Concrete can be purchased in multiple forms, including in 60 or 80-pound bags, or delivered in large amounts by specialized concrete mixer trucks. How much concrete do I need? bag provides 0.45 cubic feet of cured concrete. [1] Portland Cement Association. If you have concrete delivered it is sold by the yard (which is a cubic yard = 27 cubic feet). For all projects, add an extra 10 percent to allow for spillage and slab depth variations to help determine the concrete cost per yard. To make it even more complicated, the answer to the question "How many bags do you need?" The area of the driveway is 1,080 square feet (60-feet x 18-feet). https://www.gigacalculator.com/calculators/concrete-calculator.php. 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. Learning how to calculate the amount of concrete needed is easy when using our concrete formula and online concrete calculator. 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). See our full terms of service. Use the Readymix Concrete Volume Calculator to calculate the volume of concrete you require for your job. Drop Down Menus have M for Metric Versions. Paving mix - 1:3½ or 1:1½:2½ . The final answer is 1.3 cubic yards, but weâre not going to try and get only 1.3 cubic yards of concrete. Concrete Sonotube , Column Or Round Footing: Notes: Pre-mix concrete comes in bags that are 60 lbs. According to the table above, one cubic yard of concrete placed at a thickness of 5-inches covers 65 square feet. One 80lb-bag covers an area of about 2 square feet, for a slab 4 inches thick. All concrete is estimated in cubic yards (one cubic yard = 27 cubic feet). ft. FOR EXAMPLE: How many bags of concrete do I need for a 10' x 10' slab? How many bags do I need? 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. Calculations - unlimited. ft. / 81 = 1.23 yards of concrete or 56 (80 lb) bags of concrete To measure how much concrete we need for a slab 6 inches thick by 12 feet long by 12 feet wide, youâll 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 â¦ Rather than eroding, like most modern concrete the material seems to gain strength from the exposure, particularly in the presence of sea water. Two 60lb-bags of concrete cover an area of about 2 square feet for a slab that is 6 inches thick. Note that larger concrete stairs usually have air space beneath them, thus greatly reducing the amount of concrete you need. For example, Portland cement concrete holds water, but other types of concrete called "Pervious concrete" allow water to pass, making storm drains unnecessary. We are not to be held responsible for any resulting damages from proper or improper use of the service. 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. CONCRETE CALCULATOR - How Much Do I Need? Skip the support lines and receive priority one-on-one support from our customer service team. 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. A calculator like ours is really does a lot of heavy lifting in this case. Romans were so good at making concrete, that some of it is in perfect condition even today, some 2 millennia later. 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. Our calculator uses the formula to convert and calculate: width/3 x length/3 x depth/36 = amount of gravel in cubic yards. The simples use of our tool is as a concrete slab calculator or concrete wall calculator. *1m³ minimum order value. For large concrete jobs - four cubic yards or more - the concrete should be delivered by a â¦ Concrete contractors can provide estimates for delivering and installing cement for your post project. Amount. Calculators » Construction » Concrete Calculator. For example - the lack of suitable volcanic rocks - Romans were fortunate the right materials were on their doorstep, almost literally. Press calculate and you have the answer! Lightweight concrete is usually below 1500 kg/m3, while electrically conductive concrete is between 1450-1800 kg/m3. 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. On average it will take 90 40lb bags, 60 60lb bags, or 45 80lb bags to fill one cubic yard of concrete. rebar) which provide tensile strength (which concrete lacks on its own) resulting in reinforced concrete. Depends on how thick. 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. 2. Some quick assumptions, this is a 1500sq ft. (50ftx30ft) single story house with a full basement with concrete walls. bag provides 0.6 cubic feet of cured concrete. 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. Mr. Concrete Calculators - easy to use metric calculators for working out the cement, sand, gravel or all-in ballast required for concrete. Different concretes may exhibit highly variable density which is an important part of estimating the amount of concrete you need. A 80 lb. Enable SSL loading and calculation to keep all information 100% secure, and guarantee highest availability with access to our multi-region API servers. The calculator uses a standard readymix concrete density by default, but allows for a custom one as well. Road construction is an exception since in asphalt concrete the cement material is bitumen. You'll see both cubic yards and cubic meters in the answer area. Calculate concrete volume and cost of concrete slabs, footers, walls, columns, steps, curbs and gutters in cubic feet, cubic yards and cubic meters. No link. Regular concrete mix sold at lumberyards and home centers comes in different sized bags ranging from 40 to 80 pounds. 1. 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. This concrete calculator also calculates cubic meters. 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. Our software uses readymix concrete (a.k.a. To calculate the area we only need its diameter, since the formula is π x r2, where r is the radius, or diameter/2. How much concrete do I need? Yardage of concrete. ft. For a 4" thick slab, 100 sq. Gain valuable insights with real-time statistics and analytics for your calculator. In the construction industry, you will hear people talking about how many yards of concrete they need, or how many yards they poured. Anyone who uses your calculator must enter an email address or phone number. 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. According to the Portland Cement Association concrete with strength between 7000 and 14000 psi is considered high-strength[1]. Click the "Customize" button above to learn more! Add 5%-10% additional material to account for settling, spillage, and waste. 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. These two types of conrecte would naturally have vastly different densities. 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! Enter your length, width, and thickness then hit calculate and you'll see how many cubic yards you need. Required link back. For a wall made of concrete the calculation is practically the same: height(ft) x width(ft) x length(ft). 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). 10 x 10 slab you also have to determine the area of sq. Free for you to use the simple question: how many bags of Premix concrete needed to complete a.. Give it a try and then be sure to try out our other as. Some producers versus custom mix concrete ) in the calculations it does highly variable density is... Add water ( in proportion as specified by manufacturer ) ft. ( 50ftx30ft ) single story with. Ready mix concrete using our concrete calculator 50 kg bags needed for your.... ' x 10 ' slab years, depending on climate and other conditions ; © 2020 calculator Pro all... On buying bags of concrete you need varies by project yard ) '' box above much concrete do I concrete. 80 pounds to help you determine how much concrete do I need for job! Sized bags ranging from 40 to 80 pounds, 60-pound bags yield 0.45 feet. ' x 10 slab you also have to determine the area of a site cubic. The area of about 2 square feet ( 60-feet x 18-feet ) the strength of service. & div ; 27 & equals ; 27 & equals ; 1.8 yards. Skip the support lines and receive priority one-on-one support from our customer service team `` how many bags buy... Our customer service team `` formula '' box above square Footing Holes and Small concrete Slabs you are on! Did you know that concrete was known and heavily used in ancient Rome [ 2 ] in! Needed by the yield about 2 square feet for a custom one as well calculator to how! Portland cement concrete or calcium aluminate cement you 're getting the best quality for..., almost literally or improper use of the concrete calculator makes it easy find! Measurements provided, our calculator first works out the cement, sand, gravel or ballast. Both cubic yards, the measurement used is cubic yards ( one cubic yard or more, mixed... Complete the calculations it does provided, our calculator uses the formula to convert calculate... 60 lbs settling, spillage, and steps on top two types of conrecte would have! Calculate needs a slab, 100 sq chose the * Basic version of service. From 40 to 80 pounds asphalt concrete the cement, sand, gravel or all-in ballast for! The driveway is 1,080 square feet for a slab of concrete needed is easy when our. The support lines and receive priority one-on-one support from our customer service team ; 2020! Analytics for your project first works out the cement, sand, gravel or all-in required... Concrete placed at a thickness of 5-inches covers 65 square feet for a slab is... Our multi-region API servers most concrete is embedded with reinforcing materials ( e.g placed at a of! In place '' feet and 40-pound bags, while electrically conductive concrete is usually below 1500 kg/m3 while. Need concrete bags exhibit highly variable density which is an exception since in how many yards of concrete do i need the! Delivering and installing cement for your job especially where high compressive strength required. Ll send you an email address or phone number to specify custom concrete density and volume you can out... Length, and guarantee highest availability with access to our multi-region API servers button to. U.S. are 80 lbs and 60 lbs above to learn more cement for your project... Years, depending on climate and other conditions slab 4 inches thick and concrete thickness project! Its own ) resulting in reinforced concrete feet at 6 inches thick 20x40 ) [ 1 ] calculate for of! Additional material to account for settling, spillage, and hit calculate you... Installing cement for your project is bitumen space beneath them, thus greatly reducing the amount of concrete will an. The right materials were on their doorstep, almost literally concrete then check out the amount of concrete I! Known and heavily used in ancient Rome [ 2 ] is more complex and not supported... 10 ' x 10 slab you also have to determine how many yards concrete... Estimate it based on the chosen concrete mix estimating the amount of ready mix concrete ) in the width! Concrete Sonotube, column or Round Footing: Notes: Pre-mix concrete comes in that... Slab 4 inches thick simple question: how much concrete you need for a '. Make three measurements other conditions additional material to account for settling, spillage, and concrete.... Footing Holes and Small concrete Slabs our free concrete calculator have vastly different densities rebar ) which provide tensile (! Based on the chosen concrete mix using the measurements provided, our calculator first out. Concrete density, or estimate it based on the chosen concrete mix using the measurements provided, calculator! Allows you to use know that concrete was known and heavily used in ancient Rome [ 2?! Know the exact formula for calculating concrete then check out the cement, sand, gravel or all-in required! To determine the area of about 2 square feet for a slab, Footing,.. = amount of gravel in cubic yards of concrete you need a cubic yard of concrete strength between 7000 14000. For concrete or phone number chose the * Basic version of the service or estimate with... The service then please check out our Premix concrete calculator allows you to specify custom concrete density by,... Complicated, the answer area plug in the numbers, make sure you getting! 5-Inches covers 65 square feet ( 60-feet x 18-feet ) is estimated in yards..., especially where high compressive strength is required % additional material to account settling. Api servers talking about 40-pound bags, 60-pound bags or 80-pound bags the formula to convert and:... Can also use our density calculator to help you determine how much concrete you will need divide! Order mixed and delivered estimate it based on the chosen concrete mix sold at lumberyards and home centers in. Provide estimates for delivering and installing cement for your post project not to be held responsible for any resulting from! Calculators all Rights Reserved width, length, and thickness then hit calculate 60-feet x ). Are 80 lbs and 60 lbs allows for a slab of concrete you need. Feet for a slab, Footing, etc manufacturer ) working out the amount of concrete you for! 40 to 80 pounds need of cement in cubic yards at a thickness of 5-inches covers square. Of the driveway is 1,080 square feet calculator allows you to specify custom concrete density and volume can... In proportion as specified by manufacturer ) even today, some 2 later... If you want to calculate the amount of concrete you need a cubic of..., spillage, and thickness then hit calculate in proportion as specified by manufacturer ) beneath them, greatly... Plug in the desired width, length, width, and thickness then hit calculate formulae!

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