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You will need 3 inches of gravel under a concrete slab that is 4 inches thick. More gravel is better, but 3 inches is the minimum amount of gravel you should have with a 4" slab. Use ¾" washed and screened gravel, then compact it to level.If you buy your concrete in 80lbs bags, it will take about 45 bags to equal 1 cubic yard. So, the calculation for an example project with ten 16” (8” radius) piers poured to a depth of 36” would look like this: 10×8” 2 x36” /14850 = 1.55 cubic yards (or 70 bags of 80lbs concrete mix)First, measure down to ground level from the high end of a slope line. Add 7 1 ⁄ 2 " to that distance (4" for the subbase material and 3 1 ⁄ 2 " for the concrete if you are using 2 × 4 forms). Mark the total distance on the story pole, measuring from one end. Remove soil from the site with a spade.To determine how many bags of concrete you will need, divide the total cubic yards needed by the yields, at 4 inch thick, for a 4×6 slab you will need 0.296 yards of concrete, so number of 80lb bag of concrete = 0.296 ÷ 0.022 = 14 bags, No. of 60lb bag = 0.296 ÷ 0.017 = 18 bags & No. of 40lb bag = 0.296 ÷ 0.011 = 27 bags. ALSO READ :-.Our concrete calculator makes working the cost of a concrete slab easy. Once you know how much concrete you need (in bags) and how many slabs you'll produce out of it, simply provide the price of the bag, and you'll receive the concrete slab cost, a cost to pave your desired area, cost per unit of volume and the total cost of the material you need.At 3 inches thick, for a 3×3 slab you would need approximately either 4 80-Pound, 5 60-pound, or 8 40-pound bags of premixed concrete. If you measure in yards, 0.083 cubic yards (or 2.25 cubic feet) of concrete will be required. Let's do calculation and proceeds following steps: 1. Convert 3″ thickness in feet = 3/12 = 0.25′. How much concrete do I need for a 24×24 slab? For a 24×24 slab, you would need approximately 11.6 cubic meters of concrete. However, this amount may vary depending on the thickness of the slab. How do I calculate how many cement bags I need? To calculate how many cement bags you need, divide the total amount of concrete required (in cubic ... Place beams or post anchors in wet concrete. Tube must remain stationary until concrete sets to avoid uneven placement. For footings, pre-cut QUIK-tube and prepare the hole in the same fashion. Place approximately 2" (50 mm) of gravel in the bottom of the hole. Drive one vertical rebar into the ground in the center of the hole, then pour a 4 ...To calculate the volume of concrete: Volume = Length x Width x Height, Volume = 10 inches x 8 inches x 4 inches x 15 = 2.77778 cubic feet. Therefore, you will need approximately 2.77778 cubic feet of concrete for this rectangular slab. This is approximately: 3 (80-pound bags) or 4 (60-pound bags).When working with cement-based products, always wear eye protection and waterproof gloves. Step 1 Prior to placing concrete forms: Construct the form with 2x4 or 2x6 lumber and secure in place by wood stakes and deck screws. Excavate the slab area to a depth of about 7 inches, allowing 3 inches for a gravel base and 4 inches for concrete. Step 2Apr 25, 2023 · For example, if one 80-pound bag of concrete mix yields 0.6 cubic feet, you can calculate the number of bags required by first converting the volume in cubic yards to cubic feet (1 cubic yard = 27 cubic feet) and then dividing the total cubic feet by the yield per bag. Use Cemex's ready-mix concrete calculator to accurately calculate the volume of concrete needed for your mix or slab. Products & Services Solutions Tools & Support Find A Plant Sustainability About All Products ... Use our ready-mix concrete calculator to determine the concrete volume you need for the job. If you don't know how to calculate the ...step 3. screw the forms together and square the slab. Use your marks to screw the forms together. Align the inside of the form with your pencil mark. You can use a drill driver and deck screws like we do or you can use a hammer and nails to fasten the forms together.How much concrete do I need for a 24×24 slab? For a 24×24 slab, you would need approximately 11.6 cubic meters of concrete. However, this amount may vary depending on the thickness of the slab. How do I calculate how many cement bags I need? To calculate how many cement bags you need, divide the total amount of concrete required (in cubic ... Calculate concrete in yards or pre-mixed bags for a slab, footing, wall, or other project. Plus, calculate concrete price for the project. 90 40-lb bags make 1 yard. 60 60-lb bags make 1 yard. 45 80-lb bags make 1 yard. For example, to approximate the number of 40-pound bags needed for a 7.71-yd 3 concrete slab, you will multiply 90 x 7.71, equaling about 694 bags needed. Quick Tip: It's better to overestimate the amount you need so you don't come up short.How many concrete bags would I need for a 5 ft x 8 ft x 6" slab? 33.2 x 80lb Concrete bags. How much does it cost to pour a 5'x8' x6" slab? Ready-mix costs approx $238.26.You will need around one 25-kg bag of pre-mixed concrete to fill a foot height of an 8-inch Sonotube if you use 150 lb/ft³ concrete. To arrive at that bag number: Find the volume of a 1′ high 8" diameter column: Volume = π × (8 in)² × 12" / 4 = 603.2 in³ ≈ 0.3491 ft³. Calculate the equivalent weight of the column: Weight = 0.3491 ...The average cost of a concrete slab (6 inches thick) is $5.00-5.50 per square foot, including materials and labor. However, the price can go up to $9-10 per square foot depending on numerous factors and enhancement costs. Thus, your cost to pave a 2-car driveway of 16 feet wide, and 40 feet long (640 sq.ft.) will be about $3,200 – 3,520.The easiest way to calculate how many bags of concrete you'll need for your project. 1️⃣ Multiply your length, width and depth of concrete2️⃣ Push the 'Concr... Calculate the hole volume using 3 times the width of the post or 10.5″ or 0.88 feet: 0.88′ × 0.88′ × 2′ depth = 1.55 cubic feet. Subtract the post volume from the hole volume: 1.55 – 0.17 = 1.38 cubic feet per post hole. Multiply times the total number of posts: 1.38 × 20 posts = 27.6 cubic feet. Add 10% for waste = 30.36 cubic feet. Both of these concrete calculators make an allowance for the fact that material losses volume after being mixed to make concrete. Calculator are provided for a general mix and a paving mix, the different ratio of materials are: General mix - 1:5 cement:all-in ballast or 1:2½:3½ cement:sharp sand:gravel. Paving mix - 1:3½ cement:all-in ...So for your 32 sq ft area, this may roughly cost $17.92 for wire mesh, $96.00 for thicker wire rebar mesh and $4.16 for fiber mesh. *Reinforcing for 10 inch pours and under. How to Calculate Concrete Amount for 4x8 x6". 4 * 8 = 32 sq ft. 6 / 12 = 0.5 ft depth.How many concrete bags would I need for a 5 ft x 12 ft x 6" slab? 50 x 80lb Concrete bags. How much does it cost to pour a 5'x12' x6" slab? Ready-mix costs approx $271.54. How much does it cost to hire a contractor to concrete a 5'x12' x6" slab? A pro costs between $300.00 and $630.00. How do you calculate concrete volume?How many concrete bags would I need for a 5To calculate the number of bags needed for a project, first The Concrete by 60lb Bag calculator computes the number of 60 pound bags of concrete and water needed to mix a volume ( V) of concrete. INSTRUCTIONS: Choose units and enter the following: ( V ) Volume of Concrete Needed. 60 lb Bags (nB): The calculator returns the number of 60 lb bags needed and the gallons of water needed. Weight =1/5.5× 1925 m3×1440 kg/m3. Weight of cem Here are some general guidelines for how much gravel is needed for different types of projects: Patios: For concrete patios, a gravel base of 4 to 6 inches is typically recommended. This thickness provides a stable foundation, and adequate drainage, and helps to prevent issues such as settling and cracking. Slabs: For general-purpose concrete ... Concrete slab projects typically cost be

You will need 3 inches of gravel under a concrete slab that is 4 inches thick. More gravel is better, but 3 inches is the minimum amount of gravel you should have with a 4" slab. Use ¾" washed and screened gravel, then compact it to level.This concrete calculator allows you to estimate how much concrete you need for a specific area and how many bags of concrete are required for this space, accounting for concrete density, weight, and spillage. Concrete is often sold in bags.How many concrete bags would I need for a 10 ft x 17 ft x 6" slab? 142 x 80lb Concrete bags. How much does it cost to pour a 10'x17' x6" slab? Ready-mix costs approx $457.99. How much does it cost to hire a contractor to concrete a 10'x17' x6" slab? A pro costs between $850.00 and $1,785.00. How do you calculate concrete volume?Calculate the volume you need in cubic yards. Multiply the length (10 ft.) by the width (10 ft.) by the depth (.35 ft., or 4 in.) and divide it by 27 (the number of cubic feet in a cubic yard). You get 1.3 cu. yds. Then add 10 percent to allow for spillage and slab depth variations to help determine the concrete cost per yard.At 5″ thickness of 40×80 slab, 50 cubic yards or 1334 cubic feet of concrete will be necessary. At 6″ thickness of 40×80 slab, 60 cubic yards or 1600 cubic feet of concrete will be required. If you have a 40×80 slab with 4 inches thick, you would need 40 cubic yards (1056 cubic feet) of ready-mix concrete which will cost range between ...

For a 4×4 slab, we can repeat the calculation above with the new measurements: 4 x 4 x 0.1 (assuming a depth of 10cm) = 1.6m3. One cubic metre requires approximately 110 x 20kg Concrete Mix bags. Therefore, you will need 176 bags of concrete (1.6 x 110).Choose Round Column (or Round Slab) on the calculator. Enter Height 4 ft (or 48 in) Enter Diameter 10 in. Calculate and the answer is 0.08 cubic yards for one concrete tube. Multiply 0.08 x 50 = 4 total cubic yards of concrete for 50 tubes. Note that this calculation is the volume of your tubes only and does not account for any overflow or loss ...…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. To calculate how many bags of concrete yo. Possible cause: How many concrete bags would I need for a 5 ft x 12 ft x 6" slab? 50 .