Concrete Slab Calculator

How It Works

Take the hassle out of math and simplify your concrete planning with our best-in-class concrete slab calculator. With just 3 straightforward steps, you can quickly determine the exact amount of concrete required for your project. Whether you have various dimensions or need to calculate for multiple slabs, our calculator is equipped to handle it all. Let's start calculating!

3 Simple Steps

1. Choose your settings. Select your unit type, cost type (by bag or by the yard/meter), bag size, cost and desired waste amount. Your settings will be automatically saved for when you come back the next time.
2. Choose your shape(s). We understand that many projects require multiple shapes or dimensions. Choose from a slab, footing, column, stairs, curb/gutter, circle/tube or any combination of them—it doesn't matter how many you have, we'll do the heavy lifting.
3. Add your dimensions. Once your shapes are added, input the dimensions that you've measured for each of them. After that, your results will be shown!

Measuring Slabs

The Formula: Length × Width × Depth or Thickness

To accurately measure a concrete slab, start by obtaining the length and width of the slab using a tape measure. Measure both dimensions in the same units for consistency.

Next, determine the depth or thickness of the slab, which represents the vertical distance from the top surface to the bottom. Ensure your depth measurement also uses the same units.

Once you have these three dimensions, multiply them together (length × width × depth) to calculate the volume of concrete required for the slab.

Record, Save and Update

Yes, it's that easy. Now you can keep track of your concrete projects throughout your entire career. Bookmark this page and you're calculations will be here when you return. Need a bit more clarity on how calculations work? Check out our comprehensive guide on how to measure concrete for practical tips.