What is the formula to calculate concrete yards?
The formula for concrete calculations is (length x width x depth) divided by 27. The result of this formula provides the number of cubic yards of concrete needed. The measurements must be in feet in order for the equation to work. Concrete is comprised of several components including water, Portland cement and aggregate, which is granular ...
How do you calculate concrete in yards?
- Mark the area that will need concrete and divide it into smaller areas.
- Calculate the volume of the area after determining the shape of the area (see the chart below) by multiplying in the thickness of the concrete.
- Convert the volume from feet to cubic yards to get the number of cubic yards of concrete you’ll need.
How many yards of concrete do I need calculator?
To determine how many bags of concrete you will need, divide the total cubic yards needed by the yield. Use the following yields per each bag size: 40 pound bag yields .011 cubic yards 60 pound bag yields .017 cubic yards 80 pound bag yields .022 cubic yards READY MIX VS. BAGGED CONCRETE
How to calculate yards concrete?
Cubic yard formula
- Volume in cu ft = length × width × height
- Formula for volume in cubic yard = length (in feet) × wide (in feet) × height (in feet) ÷ 27 Generally dimension of concrete slab measured in cubic feet, you ...
- 4″ depth in feet = 4/12 = 0.33 feet
How do you calculate concrete into yards?
How do I calculate how much concrete I need for a slab?Measure the area in feet.Multiply length by width, and then by thickness.Divide the resulting number by 27 to find cubic yards.
How many yards of concrete do I need for a 24x24 x4 slab?
7.11 yardsFor example, for a concrete slab that is 24' X 24' X 4”, simply enter 4 in the Thickness/Depth field, 24 in the Width field, and 24 in the Length field. Click “Calculate”. Your answer should be 7.11 yards. Note: The Concrete Volume Calculator can also be used to determine yardage for aggregate products.
What is the formula for calculating concrete?
Use the formula. Calculating the volume for concrete requires using three dimensions: length times width (which is area) times the height (thickness) or L x W x H. If you are using feet as your standard unit of measurement, this formula will give you the volume of concrete in cubic feet.
How many yards of concrete do I need for a 10x12 slab?
Regarding this, “how much concrete do I need for a 10×12 slab?”, at 4 inches thick, generally you will need approximately 1.46 cubic yards or 39.6 cubic feet (either 86 bags of 60lb or 67 bags of 80lb) of premixed concrete for a 10×12 slab, at 5 inches thick slab, 1.85 cubic yards or 50 cubic feet (either 109 bags of ...
How much does it cost to pour a 24x24 slab of concrete?
A typical 24x24 garage slab costs between $3,057 and $5,944 with prices ranging from $5.31 to $8.31 per square foot for a 4” reinforced slab of concrete, and $6.83 to $10.32 per square foot for a 6” slab of reinforced concrete.
How many yards of concrete do I need for a 10x20 slab?
Regarding this, “how much concrete do I need for a 10×20 slab?”, at 4 inches thick, generally you will need approximately 2.44 cubic yards or 66 cubic feet or 1.969 m3 (either 144 bags of 60lb or 111 bags of 80lb) of premixed concrete for a 10×20 slab, at 5 inches thick slab, 3.07 cubic yards or 83 cubic feet or 2.35 ...
How do you calculate yards?
Here's how to do this:Convert the dimension in inches to yards (6 inches ÷ 36 inches = 0.167 yards)Convert the dimensions in feet to yards (12 feet ÷ 3 = 4 yards)Multiply the three dimensions together to find the number of cubic yards (0.167 x 4 x 4 = 2.67 cubic yards)
How many sq ft does a yard of concrete cover?
Concrete volume is measured in cubic yards. When poured on a perfectly level surface, one cubic yard will cover 27 square feet at one foot thick.
How much concrete do I need for a 4x8 slab?
At 4 inch thick, for a 4×8 slab, you will need either twenty three 60- pounds or eighteen 80- pounds or thirty six 40- pounds bags of concrete. Thus, either 23- 60lb or 18- 80lb or 36- 40lb bags of concrete will be required for a 4×8 slab at 4″ thick.
How many yards of concrete do I need for a 10x10 slab?
1.3 cubic yardsThe amount you will need for a 10 x 10 slab is 1.3 cubic yards, we always add an extra 10% to allow for any slab depth variations or spills that may occur.
How much does a yard of concrete cover at 4 inches thick?
81 square feetOne Cubic Yard of Concrete: 4-inches thick – covers 81 square feet.
How many bags of concrete do I need for a 10x10 slab 4 inches thick?
At 4″ thick, for a 10×10 slab, generally, you will need 1.23 cubic yards or 33 cubic feet or either 74- 60lb or 56-80lb bags of premixed concrete.
How many square feet is a yard of concrete 4 inches thick?
81 square feetOne Cubic Yard of Concrete: 4-inches thick – covers 81 square feet.
How much cement do I need for a 12x12 slab?
Regarding this, “how much concrete do I need for a 12×12 slab?”, at 4 inches thick, generally you will need approximately 1.76 cubic yards or 47.52 cubic feet or 1.35 m3 (either 104 bags of 60lb or 80 bags of 80lb) of premixed concrete for a 12×12 slab, at 5 inches thick slab, 2.22 cubic yards or 59.90 cubic feet or ...
How thick should a concrete slab be?
4 inchesStandard concrete floor slab thickness in residential construction is 4 inches. Five to six inches is recommended if the concrete will receive occasional heavy loads, such as motor homes or garbage trucks. To prepare the base, cut the ground level to the proper depth to allow for the slab thickness.
How many 80 lbs bags of concrete make a cubic yard?
45 bagOne 80lbs bag of Quikrete Concrete Mix will yield approximately . 60 cu ft. So it will take 45 bag to equal one cubic yard of concrete. If you have a project over a 1/2 a cubic yard you should consider our Mix On-site Concrete especially if you are hand mixing.
Calculator Use
Calculate volumes for concrete slabs, walls, footers, columns, steps, curbs and gutters. Enter dimensions in US units (inches or feet) or metric units (centimeters or meters) of your concrete structure to get the cubic yards value of the amount of concrete you will need to make this structure.
Curbs & Gutters
We calculate the volume in sections from the ground to the top of each section. The Curb and Gutter are each a section.
How to find cubic yards of concrete?
Essentially you are solving for volume and then converting to cubic yards. For concrete, the formula for volume is as follows: length x width x thickness.
How many yards of concrete do you need to order?
Many ready mix companies will have a minimum order of 1 yard, and will charge shortage fees when ordering partial batches. The average truck holds between 9 and 11 yards total. If your project requires more concrete, multiple trucks will be necessary.
Why is it important to check the size of the concrete on your footing?
The excavator may have dug too deep, or it may have rained and footings needed to be dug out deeper to reach firm soil. So it is important to check a variety of spots on your footing and get an average size. Then use the calculator to figure the amount of concrete needed.
What is bagged concrete used for?
Bagged concrete is ideal for: Pouring small slabs for sidewalks or patios. Setting posts for fences or mailboxes. Making repairs to foundation walls, walkways or steps.
How many linear feet are there in a 6' step porch?
The porch also has 9 linear feet of 6" step. So enter in the footing calculator, 6" depth by 12" width (always figure steps with a 12" width) by 9' length. This totals .17 cubic yards.
How much to add to slab for concrete?
Rule of thumb: add 1 / 4 " to the thickness of your slab for your slab concrete budget. This assumes you have the job evenly graded to the right depth, and the grade is well compacted.
How thick is a 12x12 footing?
This 12" x 12" footing needs to be calculated 12" x 16" so the footing is figured to go above grade to reach the 4" slab thickness.
how many bags of concrete are in a yard?
If you're using bagged concrete like Sakrete to do your project you'll need to know how many bags to get after you calculate your concrete.
How much extra concrete should I add to my project?
Depending on the size of your project, it's always a good idea to add a little extra, 5% to 10%. When I order concrete, I always order 1/2 to 1 yard extra, over the years I've learned running out of concrete isn't good for me, the customer or the concrete company.
How many yards is 3.93 cubic feet?
If you divide 3.93 cubic feet by 27 (3.93/27) = .146 cubic yards. Dividing cubic feet by 27 (a cubic yard) will give you the concrete yardage. This would be good to know if you had a lot of sono-tubes or a large cylinder to fill.
Can you use my concrete flatwork formula to check for slabs?
You can also use my concrete flatwork formula to double check results for slabs and floors.
How much concrete do I need?
Enter your length, width, and thickness then hit calculate and you'll see how many cubic yards you need.
How high should I grade concrete?
Once I've determined the average grade of the dirt, I can set the finish concrete floor grade up 4, 5, or 6 inches from that, depending on how thick I want my concrete floor.
What to do if you don't order concrete?
If you make a mistake and don't order enough concrete, (hopefully not) just call the concrete dispatcher and he will send another concrete truck with the balance on it. But be prepared to wait if the concrete company is busy and doesn't have a truck waiting.
Can you use a laser level on a yard stick?
Using a laser level this can be done quite easily. I use a laser level that self-levels itself when you turn it on, that way you can be sure the readings you get are accurate. For a grade stick I use a long, narrow piece of wood with a yard stick attached to it.
How to calculate cubic yard of slab?
Once you find the dimensions of your slab, input them into the calculator along with the thickness. Enter your project area measurements rounded to the nearest foot. If you’d rather do the math yourself, simply measure length, width and height in feet. Then multiply these dimensions together. Divide the resulting number by 27 to find the cubic yardage.
How to calculate how much concrete I need for a slab?
How do I calculate how much concrete I need for a slab? To calculate the amount of concrete you need for a slab, you should find the cubic yardage of the area you will be filling. Just follow these steps: Measure the area in feet. Multiply length by width, and then by thickness.
How many square feet does an 80 lb bag of concrete cover?
One 80lb -bag covers an area of about 2 square feet, for a slab 4 inches thick. Two 60lb -bags of concrete cover an area of about 2 square feet for a slab that is 6 inches thick.
How many cubic yards of concrete can a truck hold?
A truckload of concrete can usually hold a maximum of 10 cubic yards.
What factors affect the cost of concrete?
There are several things that can affect the cost of your concrete project, including: How complicated the project is: stairs will likely cost more than a slab, for example. Materials: polymer concrete is often more expensive. Labor prices: jobs that take longer and need more workers will have a higher price.
How long does it take for concrete to harden?
Here are a few common varieties of concrete: Quick-set: Hardens in 20 to 40 minutes. Best for small projects. Regular-set: 24 to 48 hour set time. Used more for large projects. High-strength: Usually sets in 10 to 12 hours.
Does adding rebar to concrete cost more?
Extra strength: adding rebar or mesh to the concrete will up the cost. Additional tasks: if pros need to remove debris, get rid of your existing patio or dig before starting, it will be more expensive.