About EstimateMix
We build calculators for the questions that come up right before a trip to the hardware store or a call to a supplier: how many bags, how many yards, how much will this cost.
What we do
Every calculator on this site runs on the same small set of formulas — the volume of a slab, a footing, a cylinder — combined with manufacturer bag yields and typical material densities. Enter your project's dimensions and the numbers update instantly, with no account, no email capture, and no data sent anywhere; the math runs in your browser.
Where the numbers come from
Bag yields, block weights and material densities are drawn from published manufacturer specifications rather than estimated from experience. See our editorial standards for the specific figures we use and how we handle corrections.
What this isn't
These tools give planning estimates, not engineering or structural specifications. Footing depth, rebar, and code requirements vary by location — always confirm those with your local building department or a licensed contractor before you dig or pour.
Get in touch
Found a number that looks off, or a calculator you wish existed? See our contact page.