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
- Convert cubic feet to cubic yards by multiplying by .037
- 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.
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.
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 to calculate concrete needed to pour a slab?
The best way to calculate how much concrete you will need in cubic yards is to do the following:
- Mark your area that needs concrete and divide it into smaller areas.
- Calculate the volume of your area after determining its shape (see the examples below) by multiplying it with the thickness of the concrete.
- Convert the volume from feet to cubic yards to get a precise number of concrete that you need – in 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
What is the formula for calculating foundations?
As per Rankine's formula the minimum depth required, The depth of foundation as provided = 3 x 0.15 + 0.20 = 650 mm, safe. The new base would be provided below the existing one as shown in the sketch.
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 do you calculate cubic meters 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 much concrete do I need for wall Foundation?
There's a pretty simple formula. Take the length in feet times the width and height of the wall to figure your cubic footage. Then divide that figure by 27 to get your cubic yards (because there are 27 cubic feet in a cubic yard).
How do you figure square footage for concrete?
Multiply the length times the width for square footage. For instance, if you plan to pour a concrete driveway that will be 25 feet long and 12 feet wide, the square footage would be 300 square feet.
What is cubic meter formula?
Length x Width x Height = CBM This is the formula used to measure your cargo volume in CBM (m³). Say, you have a carton that is 2 metres long, 2 metres wide and 2 metres high. Then, its volume is 2 x 2 x 2 = 8 m³.
How much cement do I need for 1 cubic metre of concrete?
To make 1 cubic metre of concrete, you will need: 10 bags cement + 0.65 cubic metres sand + 0.65 cubic metres stone.
How do you calculate cement and sand for concrete?
5 and M5 concrete, 1.52 cubic meters of “total dry volume” of cement, sand and aggregate are needed....Volume of Sand and Aggregate required for 1 cubic meter of M20 grade concrete.Volume of sand needed= Volume of sand x 35.32=0.427 x 35.32= 15.08 cftVolume of aggregate needed= Volume of agg x 35.32= 30.16 cft
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.
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.
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.
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.
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.
How high is a course of concrete?
A course of standard concrete block, including the mortar joints, is eight inches high. Divide the height of the foundation (in inches) by eight to figure out how many courses you need. Advertisement.
How to calculate the number of blocks needed for a course?
A standard block is 16 inches long, which means that one foot equals three-quarters of a block. Multiply the total linear length (in feet) by 0.75 to obtain the total number of blocks needed for one course.
Why is it important to examine the foundation of an existing building?
Sometimes, it becomes necessary to examine the foundation of an existing building to check if it is safe or if it would be safe for addition of one or more floors on the existing structure.
Why does the soil bulge out on either side of the foundation?
Due to the pressure transmitted on the soil, slight downward movement of footing develops fully plastic zones and the soil bulges out on either side of the foundation, which is general shear failure. Due to displacement of soil from below, settlement of foundation occurs.
What is grillage foundation?
Grillage foundation is a special type of isolated footing generally provided for heavily loaded stanchions, specially in those locations where bearing capacity of soil is poor . The depth of the foundation is limited to 1.0 m to 1.5 m.
Why are grillage foundations obsolete?
In the present days, timber grillage foundations are becoming obsolete due to non-availability of timber and prohibitive cost.
What is an additional floor?
An additional floor is proposed to be constructed on a two-storeyed masonry building. How would you examine whether the existing foundation is safe for the additional floor? Suitable data for the existing width of foundation, bearing pressure of the soil, load, etc. may be assumed.
Can foundations be repaired?
Repairs of Foundations: Decay, damage and repairs of foundation are not very common events of buildings. Actually if foundations like grillage and deep foundations like pile, raft, under-reamed pile, etc. are damaged, the entire building gets affected and repairs of these foundations are rarely possible. Hence, maintenance of these foundations ...
Can you use a timber grillage foundation below the walls?
Timber grillage foundation. Timber grillage foundations may be used below the walls. From the nature of construction, it is evident that steel grillage foundation, if constructed properly and load distributed on the soil below is within safe bearing capacity of the soil, the foundation need very little maintenance.