Concrete Calculator
Estimate slab concrete in cubic yards and bags from your dimensions. Change the sample numbers to get an instant estimate tailored to your situation.
Your inputs
Adjust any value to update the results.
Calculated results
Based on your current inputs
Calculating…
How this calculator works
Enter the finished slab dimensions in feet and inches. Specify the yield on the bag of premixed concrete you plan to purchase.
Formula
Length × width × slab depth ÷ 12 ÷ 27, then allow for extra.
Before you use the result
Calculator outputs are estimates based on the numbers you provide. Replace the examples with measurements, costs, rates, or product information appropriate to your situation.
This simple slab estimate excludes footings, thickened edges, reinforcing steel, delivery minimums, and compaction; confirm final order quantities with your contractor or supplier.