Concrete Volume Calculator
Calculate concrete volume in cubic feet and cubic yards. Perfect for slabs, footings, cylinders, and piers.
Dimensions
Concrete Required
For estimation purposes only. Verify structural calculations with a licensed engineer.
How to Calculate Volume of Concrete
Before ordering materials from a ready-mix plant, you must know how to accurately calculate concrete volume. Buying too much concrete wastes money, while buying too little results in a disastrous "cold joint" if the pour has to be stopped halfway.
To find your total requirement, use a concrete volume calculator. Volume is a three-dimensional measurement representing the total physical space the concrete will occupy. In the US, this is always measured in cubic feet or cubic yards.
What is the Concrete Volume Formula?
The specific concrete volume formula depends entirely on the shape of your pour. Our cubic volume calculator handles these shapes automatically, but it is helpful to know the underlying math.
1. Rectangular Slab Volume
Used for patios, driveways, sidewalks, and rectangular footings.
Volume = Length (ft) Width (ft) Depth (ft)2. Cylinder Volume (Piers & Columns)
Used for fence posts, Sonotubes, deck piers, and circular columns. To find the volume of a concrete cylinder, you need the radius (half the diameter) and the height.
Volume = r hUsing a Concrete Yardage Volume Calculator
Once you have calculated your total volume in cubic feet (using either the rectangular or cylindrical formula), you must convert it into cubic yards before calling the dispatch company.
A concrete yardage volume calculator simply takes your total cubic feet and divides it by 27. (Because 1 cubic yard = 27 cubic feet).
Total Cubic Feet 27 = Cubic Yards
Always add a 10% waste factor to your final volume calculation. Uneven subgrades, spillage, and concrete left in the bottom of the pump truck hose will eat up your volume faster than you think.