Readymix Concrete Calculator
Use the Readymix Concrete Volume Calculator to calculate the volume of concrete you require for your job. If you are not sure of how to calculate the volume of different shapes, you can use the Common Shape Calculator which will provide you with the appropriate equations.
Frequently Asked Questions
How much concrete is in a yard?
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 does a yard of concrete weigh?
A solid, unbroken slab of concrete weighs about two tons (or 4,000 pounds) per cubic yard. Breaking up concrete roughly halves the total weight per cubic yard to about one half ton (or about 2,000 pounds).
How many bags of concrete are in a yard?
To produce one yard of concrete, you’ll need to use about 45 80-pound bags (or 90 40-pound bags). Because of the time and labor required to prepare such a large quantity, it is usually more cost- and time-effective to have ready mix concrete delivered.
Should I buy bagged concrete or have ready mix delivered?
CEMEX specializes in ready mix concrete formulated to your exact specifications and delivered to your job site. Larger jobs can be completed much more easily and efficiently when you order ready mix concrete by the yard. Ready mix concrete is ideal for large patios, driveway renovation, pool decks, home foundation slabs, parking lots, and new sidewalk construction. If you’re just doing some DIY maintenance around your home property, a yard of concrete is going to be far more than you’re able to use. In these cases, it makes more sense to purchase bagged products and mix them yourself. Examples of smaller projects include minor repairs (curbs, sidewalks, stairs, etc.), ramps, small patios, and setting fence posts.
What’s the minimum amount of ready mix concrete I can order?
CEMEX has a minimum order volume of 1cubic yard per delivery.
How much extra should I order?
Ordering the exact amount of concrete, you need for a job is a recipe for disaster. As a general rule, you should add an additional margin of 10 to 15% to your order to account for things like spillage while pouring, uneven subgrades, and other variables. Coming up short on a concrete pour will always be far more expensive than the cost of factoring in extra concrete from the start. The project timeline gets delayed, you have to pay your crew for the additional time spent, and you have to account for the cost of dispatching another truck to the job site – all factors which eat into your budget and hurt your bottom line. The quality of the pour itself is also likely to suffer – time is of the essence when pouring concrete, so you run the risk of having a cold joint occur where the two separate pours do not combine seamlessly. In a worst-case scenario, you may have to tear it all up and start over.
The calculator will estimate the volume of concrete or aggregate needed for your project.
You can calculate how much concrete you need for your construction project using this calculator that works in both US Customary Units (feet and inches) and International System of Units or metric units (meters and centimeters) of measurement.
Most concrete purchases will be made in cubic yards, which equates to 27 cubic feet. For example, a project measuring 10 ft in length by 10 ft in width with a depth of 3.5 in will be just over 1 cubic yard. The equivalent to a single cubic yard in metric measurements would be roughly 0.76 cubic meters.
The output of this calculation should make it simple for you to work out the estimated cost of the concrete materials that you require. For more specific pricing, contact your CEMEX sales representative to discuss.
There’s rarely a perfect pour in any project, so you may consider adding a little extra contingency to your order to account just to be on the safe side. The amount you decide to order will depend on the size and complexity of your site and project. It’s also important to know how this will affect your overall budget.
The concrete calculator should help you get started on the planning phase of your project. Be sure to discuss with your sales rep when you are ready to order your concrete.
To use the calculator:
- Choose units of measure: English or Metric.
- Enter the width, length, and thickness of the project.
- Select whether you are measuring thickness in feet or inches.
- Click Calculate.
Calculate Volume of Square Slab
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. Also enter quantity and price to calculate total volume and cost of materials when you enter the price per cubic foot, price per cubic yard or price per cubic meter.
For example, let's say you have 50 round concrete form tubes, sonic tubes, Sonotubes or cement tubes that you need to fill. They are 4 feet in height and 10 inches in width (diameter), or 4' x 10".
- Choose Round Column (or Round Slab) on the calculator
- Enter Height 4 ft (or 48 in)
- Enter Diameter 10 in
- Calculate and the answer is 0.08 cubic yards for one concrete tube
- Multiply 0.08 x 50 = 4 total cubic yards of concrete for 50 tubes
- Note that this calculation is the volume of your tubes only and does not account for any overflow or loss at the bottom of your tubes
Concrete Volume Formulas and Images for Different Concrete Forms
Square Slab
Calculate concrete volume of a square slab
Using measurements in feet:
Volume in Cubic Feet (ft3) = Width x Length x Depth
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Round Slab
Calculate concrete volume of a round slab
Using measurements in feet:
Area
of the Circle (ft2) = Pi x (Diameter/2)^2
Volume in Cubic Feet (ft3) = Depth x Area
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Pi = 3.14
Wall
Calculate concrete volume of a wall
Using measurements in feet:
Volume in Cubic Feet (ft3) = Thickness x Length x Height
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Footer
Calculate concrete volume of a footer
Using measurements in feet:
Volume in Cubic Feet (ft3) = Width x Length x Depth
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Square Column
Calculate concrete volume of a square column
Using measurements in feet:
Volume
in Cubic Feet (ft3) = Width x Length x Height
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Round Column
Calculate concrete volume of a round column
Using measurements in feet:
Area of the Circle (ft2) = Pi x (Diameter/2)^2
Volume in Cubic Feet (ft3) = Height x Area
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters
(m3) = Volume in Cubic Feet (ft3) x 0.0283
Pi = 3.14
Steps
Calculate concrete volume of steps
Using measurements in feet:
Number of Steps is the total number of steps including the platform.
We calculate the volume in sections from the ground to the top of each section.
The platform and each step are each sections.
Volume in Cubic Feet Under Platform =
Platform Depth x (Rise
Height x Number of Steps) x Width
Counting steps starting at the bottom step and not including the platform we'll have Step Number 1, Step Number 2, Step Number 3, etc.
Volume in Cubic Feet Under Each Step =
Run Depth x (Rise Height x Step Number) x Width
Total up the step volumes then the total concrete you need is
Volume in Cubic Feet = Volume in Cubic Feet Under Platform + Volume in Cubic Feet Under Steps
Volume in Cubic Yards (yd3) =
Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Curbs & Gutters
Calculate concrete volume of curbs & gutters
Using measurements in feet:
We calculate the volume in sections from the ground to the top of each section. The Curb and Gutter are each a section.
Volume in Cubic Feet Under Curb =
Curb Depth x (Curb Height + Flag Thickness) x Length
Volume in Cubic Feet Under
Gutter =
Gutter Width x Flag Thickness x Length
Volume in Cubic Feet = Volume in Cubic Feet Under Curb + Volume in Cubic Feet Under Gutter
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
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