How do you figure yards of concrete?
- Measure the area in feet.
- Multiply length by width, and then by thickness.
- Divide the resulting number by 27 to find cubic yards.
- Measure the area in feet.
- Multiply length by width, and then by thickness.
- Divide the resulting number by 27 to find cubic yards.
What is the formula to calculate yards of concrete?
how much concrete do i need for a 10' x 10' slab?
- @ 4" thick you'll need 1.25 yards of concrete
- @ 5" thick you'll need 1.6 yards of concrete
- @ 6" thick you'll need 2 yards of concrete
How many cubic feet are in a yard of concrete?
You might be wondering just how much concrete is in a cubic yard? A cubic yard is equal to 27 cubic feet or 46,656 cubic inches, or 45 80lb bags. Concrete Cubic Yards Formulas Use the following formulas to calculate the concrete needed for various types of pours. Square and Rectangular Areas
How many cubic yards of concrete do you need?
You can use this measurement to figure out how many bags of concrete to use. 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. Go to concrete yardage calculator
How do you calculate a square yard of concrete?
Method 2 Method 2 of 2: Quick Method for Basic Slabs Download Article
- Ensure your concrete pour is a rectangular prism. Contractors have devised a quick, easy system of determining how much concrete yardage is needed for a given pour.
- Find the square footage of the area you're pouring. Square footage (written "sq. ...
- Divide your square footage by a numerical coefficient. ...
- Determine odd coefficients manually. ...
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.
How do you figure concrete yardage?
CONCRETE CALCULATOR FORMULA Multiply the length by the width to determine square footage. Convert the thickness from inches to feet. Multiply the thickness in feet by the square footage to determine cubic feet. Convert cubic feet to cubic yards by multiplying by .037.
How many cubic yards are in 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.
What is the formula for figuring out 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 ...
What is a cubic yard of concrete?
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 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 ...
Does a 10x10 concrete slab need rebar?
Rebar is not necessary for every concrete project. The general rule of thumb is that if you are pouring concrete that is more than 5 inches in depth, you are probably going to want to add in some rebar to help reinforce the entire structure.
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 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 square feet is a yard of concrete 4 inches thick?
81 square feetOne Cubic Yard of Concrete: 4-inches thick – covers 81 square feet.
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 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 much does concrete cost per yard?
How much is concrete a yard? The cost of concrete per cubic yard depends on which brand you purchase, but usually costs about $110 for bags .
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.
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.
Can you order concrete by cubic yard?
If you have a larger job, like a building a driveway or pool deck, it’s probably best to order concrete by the cubic yard or hire a concrete delivery service. For smaller jobs, like setting posts for fences or small curbs, mixing bags of concrete should be sufficient.
How to find concrete yardage?
Now that you've found your square footage, all you need to do to find your project's concrete yardage is to divide the square footage by a certain number - the thicker your project, the smaller the number; the thinner your project, the larger the number.
How to find square footage of concrete?
To determine your concrete job's square footage, simply multiply the length and width of the area you're pouring into without taking into account its depth.
How to calculate concrete pouring thickness?
If the thickness of your concrete pour doesn't match any of the examples above, you can quickly calculate it by dividing 324 by the thickness of your concrete project (in inches). Then, divide your square footage by your answer to find your project's yardage.
How many bags of dry concrete mix to make 1 cubic meter?
Below are rough estimates for how many bags of dry concrete mix it takes to make one cubic meter of wet concrete: 40 kg bag: 56 bags to make 1 cubic meter. 32 kg bag: 71 " " " 1 cubic meter.
How many prisms are there in a slab?
However, if you need to pour a slab along with 4 straight walls, each wall would be its own prism, resulting in a total of 5 prisms.
How to find volume of rectangular prism?
A rectangular prism's volume can be found by multiplying its length times its width times its height. For example, in the next few steps, let's imagine that we're pouring a slab that is 10 feet (3.05 m) long, 12 feet wide (3.66 m), and 4 inches (10.16 cm) deep. ...
How is concrete volume measured?
Familiarize yourself with how concrete volume is measured. Concrete's volume (the amount of physical space it takes up) is typically measured in either cubic yards (yds 3) or cubic meters (m 3 ). A cubic yard is a 3-dimensional cube that is 3 feet long in each dimension, while a cubic meter is a cube that is 1 meter long in each dimension.
Should I order concrete by the yard from a ready mix company or just use bags?
Larger jobs such as driveways are easier to complete when ordering concrete by the yard, rather than trying to mix bag after bag by hand. For smaller jobs, like a walkway, modest patio or footings, you should calculate the number of concrete bags instead.
Calculating the amount of concrete needed for slabs (including odd shapes)
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.
Calculating the amount of concrete needed for footings
Footings will rarely follow the drawing exactly. In rocky soil the footings may collapse when big rocks are excavated
Estimating concrete steps
Steps seem tricky to calculate but are not. If there are three steps leading up to a porch:
Calculating the amount of base fill
Granite Construction has an excellent base fill calculator on their site. Use this to figure how much material you need for the subgrade.
Requesting your ready mix supplier to visit your site
After you have chosen a Ready Mix Supplier, have a representative come to your site to give his/her opinion on the quantity required. Compare the figure with what you came up with. Discuss any variances with the supplier.
Concrete calculator formula for floors and slabs
This is how you use a formula to calculate concrete for a square concrete slab or a rectangular shaped floor or slab.
concrete calculator formula for a round slab
The formula to calculate concrete yardage for a round slab is very different than the formula for a square slab. Square footage is calculated using Pi and the diameter of the circle to help determine cubic yardage.
calculator formula for a concrete wall
Calculating concrete yardage for a wall uses the same formula as a slab.
Formula to calculate concrete for a footer
Calculating concrete yardage for a footing is done much like a slab, you just usually have smaller units of measurement for width.
Concrete calculator formula for a square column
Calculating concrete for a square column first starts with calculating the cubic feet of the column.
Formula to calculate concrete for a round column
The formula to calculate concrete yardage for a round column is just like the round slab formula above. The difference is a column's height is usually much greater than a slab.
How to calculate concrete for steps
This is how you calculate concrete yardage for a set of concrete steps.
