Pure math. No sign-up. Printable shopping list.
How much material do you need?
Free DIY material calculators - concrete, paint, mulch, fence, flooring, tile, drywall and more. Get exact quantities plus a printable shopping list you can take to the store. No account required.
Concrete slab calculator
The most common DIY pour. Change the dimensions to match your project.
Material Totals
1 cu yd = 27 cu ft. One 80lb bag covers ~0.6 cu ft; one 60lb bag ~0.45 cu ft. For pours over ~1 cu yd, ready-mix delivery is usually more economical.
Printable Shopping List
Generated by BuildTotals.com | 6/13/2026 | buildtotals.com/tools/concrete-calculator
Estimates include 10% waste factor. Confirm with your supplier before purchasing.
This calculator provides estimates only. Actual material needs vary with site conditions, waste, product dimensions, and installation method. Confirm quantities with your supplier or a licensed contractor before purchasing.
Free material calculators
Pure math, no guessing
Every result is computed from standard material dimensions - no AI estimates, no databases. The same math your supplier uses.
Printable shopping list
Every calculator outputs a clean, printable list of materials and quantities. Take it to the store or share it with your crew.
Waste factor built in
Running short mid-project is the most common DIY mistake. Each calculator includes a configurable waste factor so you buy enough the first time.
Common project guides
All projectsPre-filled calculators for the most common DIY projects - with notes on what to watch out for.
Frequently asked questions
How accurate are these calculators?
The calculators use standard material dimensions (e.g., 80lb bags cover 0.6 cu ft of concrete) and a configurable waste factor. They give you a reliable planning estimate - always confirm quantities with your supplier before purchasing, since site conditions vary.
What is a waste factor and why does it matter?
Waste factor accounts for cuts, breakage, and material left over at edges. For concrete it is typically 10%. For tile it is 10-15% (more for diagonal layouts). For flooring it is 10%. Skipping the waste factor is the number one reason DIYers run short mid-project.
Should I buy premix bags or order ready-mix concrete?
For small pours under about 1 cubic yard (27 cu ft), premix bags are practical. Above that, a ready-mix truck delivery is faster and often cheaper per cubic yard. The concrete calculator shows both the bag count and cubic yard total so you can compare.
Do I need to create an account?
No. All calculators run entirely in your browser - no account, no email, no data uploaded. Close the tab and everything is gone. We cannot sell what we never collect.