What is the formula for calculating concrete?
Three steps to ordering enough concrete:
- Use the concrete calculator
- Figure depths and widths as they have been built on the site, not simply what the plans say.
- Add a margin of safety
How much concrete will I need calculator?
While the hole may be 42 inches deep, you need to subtract the 6-inch gravel layer to calculate an accurate concrete amount. So, the 42-inch hole is actually a 36-inch hole for the purpose of determining the amount of concrete. Calculate the amount of concrete per post.
How do you estimate concrete?
General contractors estimate 2,000 of their workers have been idled ... there could be up to 15,000 people not working by month's end, they said. Some 330 concrete mixer drivers and concrete plant workers represented by Teamsters Local 174 are on strike ...
How do you calculate the amount of concrete?
You can calculate the amount of concrete you need by employing a mathematical formula. Advertisement Step 1 Know that the formula for calculating concrete consists of the following: ((length x width x height)/27) x 1.05 = Total concrete needed plus 5 percent extra. The length, width and height are measured in feet.
How do you calculate concrete?
How to calculate concrete:Determine how thick you want the concrete.Measure the length and width that you'd like to cover.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.More items...•
What is the formula for concrete yardage?
Measure the area in feet. Multiply length by width, and then by thickness. Divide the resulting number by 27 to find cubic yards.
How do you calculate m3 of concrete?
Multiply the width, length and depth of your area. Concrete is usually ordered in cubic metres. Here's a conversion guide. There are 1.3 cubic yards in one cubic metre (If you have your requirement in cubic yards, all you need to do is divide by 1.3 to get the cubic metres answer).
How many bags of concrete do I need for a 12x12 slab?
Regarding this, “how many bags of concrete do I need for a 12×12 slab at 4 inch thick?”, its depend on thickness of slab, at 4 inches thick, generally you will need approximately either 104 bags of 60lb or 80 bags of 80lb (1.76 cubic yards or 47.52 cubic feet or 1.35 m3) of premixed concrete for a 12×12 slab.
How much concrete do I need for a 10x10 slab?
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 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 kg is 1m3 of concrete?
1m3 concrete weight in kg:- weight of 1m3 (cubic meter) of concrete is around 2.5 metric tons or 2,500 kilograms for RCC and 2.4 metric tons or 2,400 kilograms for PCC.
How many m2 are in a m3?
one square meterWe get cubic meters when we multiply length x breadth x thickness and square meter on multiplication of length x breadth. Therefore, to convert cubic meter to square meter, we need to divide the volume by thickness. One cubic meter is equal to one square meter.
How many kg is 1m3 of cement?
The basic things you should know to calculate the volume of 1 bag of cement are, Density of cement = 1440 kg/ m³ 1 bag = 50 kg of cement.
How many bags of concrete do I need for a 10x10 slab 3 inches thick?
The amount of concrete I used for this 10' x 10' slab was 2 yards. First, here's how many yards of concrete you need for a 10 x 10 slab based on how thick it is. The amount of concrete you need for a 10 x 10 slab that's 3 inches thick is 1 cubic yard.
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 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.
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.
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.
Concrete calculator formula
Using the measurements provided, our calculator first works out the volume of the required concrete mix using the formulae given below.
Example calculations
Before we begin please note: The number of bags required must be rounded up, otherwise you’ll be left without sufficient concrete.
How does concrete harden after mixing?
After it has been mixed properly it will become a paste that can then be applied to the necessary areas, and will gradually harden. In order for the concrete to settle properly and retain its strength, it should be in a humid environment which is at a reasonable temperature.
What is Portland cement?
While there are a range of concrete types, Portland cement is what most people refer to as "concrete". This is because it is the most commonly found type and is the most used construction material in the world. When being used, the concrete is usually mixed along with sand or fibers, as well as other materials that are meant to reinforced.
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.
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 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.
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.
Concrete Mixes
The calculator will indicate the number of bags you will need to build a 4 inch or 6 inch slab. (all yields are approximate and do not allow for uneven substrate, waste, etc.)
Mortar Mix
The calculator will indicate the number of 60 or 80 pound bags of QUIKRETE® Mortar Mix you need to construct your project with a 3/8 inch mortar joint. (All yields are approximate and do not include allowance for uneven subgrade, waste, etc.)
Fast-Setting Concrete Mix
Remember, the depth of the post hole should be one-half of the above-ground post height. (Example: For a 6 feet above ground post, use a post with an overall height of 9 feet and place 3 feet in the ground). The calculator will indicate the number of 50 lb. bags of QUIKRETE® Fast-Setting Concrete you need.
Base Coat Stucco & Finish Coat Stucco
The calculator will indicate the number of 80 lb bags of QUIKRETE ® Base Coat Stucco and Finish Coat Stucco you will need to construct your stucco wall using a traditional 3 coat or 2 coat application process. (All yields are approximate and do not allow for uneven application thickness, waste, etc.)
Veneer Stone Mortar
The calculator will indicate the number of 80 lb. bags of QUIKRETE ® Veneer Stone Mortar you will need to construct your wall, including the scratch coat, bond coat and jointing mortar application. (All yields are approximate and do not allow for uneven application thickness, waste, etc.)
Concrete Crack Sealants
The calculator will indicate the number of 10.1 oz. tubes of QUIKRETE ® Polyurethane Concrete Crack Sealant or 10.1 oz tubes of Concrete Repair you will need for your project.
Mortar Joint Sealants
The calculator will indicate the number of 10.1 oz. tubes of QUIKRETE ® Polyurethane Mortar Joint Sealant or 10.1 oz tubes of Mortar Repair you will need for your project.