Full Answer
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 yard of concrete?
Steps to Calculate Cubic Yards of Concrete
- Measure the length, width, and height of the slab, footing, or column. ...
- Convert dimensions to feet if they aren’t already. ...
- Multiply the width times the length times the height (W × L × H), or use our volume calculator to find the cubic feet.
- Convert the volume to cubic yards from cubic feet. ...
How do you figure out a yard of concrete?
Aside from style alone, few people know how to choose between stone, brick, or concrete pavers for their patio ... A standard patio ranges between $800 and $4,500, though the size of your yard and patio might dictate the materials you choose to work ...
How do you figure a yard of concrete?
How do you figure yards of concrete? Multiply the width times the length times the height (W x L x H). You can also use our volume calculator to find cubic yardage of a space.
How do you calculate yards of concrete?
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.07-Jan-2021
What is the formula for concrete calculation?
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 do I figure how much concrete I need?
For concrete, the formula for volume is as follows: length x width x thickness. 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.23-Apr-2018
How many yards of concrete do I need for a 24x24 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 many square feet is a yard of concrete 6 inches thick?
54 square feetOne Cubic Yard of Concrete: 4-inches thick – covers 81 square feet. 5-inches thick – covers 65 square feet. 6-inches thick – covers 54 square feet.
How much concrete do I need for a 10x10 slab?
The 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.25-Sept-2020
How thick should a concrete slab be?
Standard 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 do you calculate the area of a slab?
Firstly, you need to calculate the area of your concrete slab. To do this simply multiply the length of the slab by the width. ... For measuring a more complex slab design, try to break the total area into separate rectangles or squares. ... Now that you have your area calculation, you need to divide the area by 12.5.
How much concrete do I need for a 4x8 slab?
Regarding this, “how many bags of concrete do I need for a 4×8 slab?”, at 4 inches thick, generally you will need approximately either 23 bags of 60lb or 18 bags of 80lb of premixed concrete for a 4×8 slab, at 5 inches thick slab, either 29 bags of 60lb or 23 bags of 80lb premixed concrete are required, while at 6 ...
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 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 ...
What is concrete mixed into?
Alternatively, in some factory settings, concrete is mixed into dryer forms to manufacture precast concrete products such as concrete walls. The process of concrete hardening once it has been placed is called curing, and is a slow process.
What is cement used for?
Cement is a substance that is used to bind materials, such as aggregate, by adhering to said materials, then hardening over time . While there are many types of cement, Portland cement is the most commonly used cement, and is an ingredient in concrete, mortar, and plasters.
Why is concrete mixing important?
Proper mixing is essential for the production of strong , uniform concrete. It involves mixing water, aggregate, cement, and any desired additives. Production of concrete is time-sensitive, and the concrete must be placed before it hardens since it is usually prepared as a viscous fluid.
Is concrete time sensitive?
Production of concrete is time-sensitive, and the concrete must be placed before it hardens since it is usually prepared as a viscous fluid. Some concretes are even designed to harden more quickly for applications that require rapid set time.
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.
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.
How to calculate how many yards of concrete do you need for different applications?
Calculating yards of concrete is in fact very simple. It is basically the process of calculating the volume that needs to be filled with concrete. These calculations often use simple mathematical equations, depending on the shape of the object.
Concrete Yards Calculator
You can also use tools that can help you calculate how many yards of concrete do you need for your project, just like our “ Imperial Concrete Calculator (Cubic Yards & Bags) “.
How many square feet in a yard of concrete?
Generally, a yard of concrete means a cubic yard, which resembles volume. Whereas, a square foot is an area unit. Hence, in order to calculate how many square feet in a yard of concrete, we should also consider thickness.
How many yards of concrete do I need for a 24x24x4 slab?
For a 24x24x4 slab, you will need exactly 7.11 cubic yards of concrete. Considering the slab of 24 feet x 24 feet x 4 inches, the required concrete yards or volume = area x thickness, as explained in this article.
How many yards of concrete do I need for a 30x30x4 slab?
For a slab of 30x30x4, you will need 11.11 cubic yards of concrete. Actually, the calculation is simple, in order to calculate the volume of the 30 feet x 30 feet x 4 inches slab, you need to convert the units from inches and feet to yards first.
How many yards of concrete do I need for 800 square feet slab 6 inches deep?
For 800 square feet slab, 6 inches thick, you will need exactly 14.81 yards of concrete. The formula is as follows, 800/9 x 6/36 = 14.81 cubic yards. We divide by 9 in order to convert square feet into square yards, and by 36 to convert inches to yards.
How many cubic feet in a yard of concrete?
One yard of concrete equals 27 cubic feet. In fact, each linear yard makes 3 linear feet. Hence, to convert cubic yards to a cubic feet, multiply by 3 three times (3x3x3 = 27).
How much concrete is in a yard?
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.
How much does it cost to install concrete slabs?
Average price of concrete. The average cost to install a concrete slab is $6 – $20 per square foot. Besides the cost of concrete and materials, there are also labor costs for preparing the area, the pour, and finishing.
What is concrete made of?
Concrete, which is a mix of water, aggregate, and cement, is most commonly sold by the cubic yard, but is also available in pre-mixed bags. It’s important to calculate the amount of material needed as accurately as possible since you often only get one chance for the pour. We’ll cover the process for estimating concrete in detail below, ...
How much does ready mix concrete cost?
Ready-mix concrete typically starts around $115 per yard but could cost upwards of $150 or more, depending on the mix and your location. Consider that there will likely be additional fees for ready-mix for smaller projects, such as delivery or short-load fees.
Can you mix concrete bags on site?
But, keep in mind that mixing bags on-site can become difficult if you’re pouring a large slab or many footings. For the most part, ready-mix concrete from a truck is more cost-effective than bags and makes sense if you have a mid-size project and can pour all at once.
How many yards of concrete do I need calculator?
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 do you figure out how much concrete you need?
Multiply the width times the length times the height (W × L × H), or use our volume calculator to find the cubic feet. Convert the volume to cubic yards from cubic feet. To do so, divide the cubic footage by 27 to get the yards of concrete needed.
How many bags of cement do I need for 100 square feet?
4 bags ( 401 kg) of cement and 1593 nos bricks are required for 100 square feet 13.5 inch brick wall.
How much is 4 yards concrete?
This means you can expect concrete prices for 2020 to be $128 per cubic yard and in 2021 it’ll grow to $134 per cubic yard on average. Bulk Concrete Prices.
How many 80lb bags of concrete makes a yard?
If you’re using 80lb bags of concrete, you’ll need 45 bags to make a yard.
How thick should a concrete slab be?
Standard 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 cubic feet is a bag of concrete?
With this formula in mind, you’ll be able to calculate just how much concrete or cement you’ll need for your project: One 60 -lb bag of concrete gives you. 45 cubic feet of concrete when mixed with 2.5 quarts of water. In order to have enough concrete for one cubic foot, you’ll require 2.2 bags of 60 -lb concrete.
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.