Concrete Volume Calculator
Find exactly how many cubic yards of concrete you need — no more guessing. Perfect for slabs, columns, and footings.
You need approximately
* This concrete calculator provides an estimate. Always consult a professional and add a small margin (5–10%) for waste.
How to use this concrete volume calculator
Whether you're pouring a patio slab, a deck footing, or a structural column, knowing the exact concrete volume is critical. This concrete calculator helps you answer "how much concrete do I need?" in seconds. Simply choose your shape (slab, column, or footing), enter the dimensions in feet and inches, and the tool instantly converts to cubic yards — the standard unit for ordering ready-mix concrete.
For a slab, input length, width, and thickness (inches). For a column or round footing, provide diameter and height. The calculator uses the correct geometry (πr²h for cylinders) and divides by 27 to convert cubic feet to cubic yards. This cubic yards concrete calculator eliminates guesswork, so you avoid the costly mistake of ordering too much or the frustration of running short mid-pour.
Pro tip: Always round up slightly and account for variations in subgrade. Most contractors recommend adding 5–10% to the calculated volume. Bookmark this tool for every project — from small DIY jobs to larger construction estimates.