Disclaimer
Results on this site are estimates. They do not replace a professional calculation.
What an estimate means here
A calculator takes the measurements you enter, applies geometry and a small number of published reference values, and rounds the result for display. Each step can differ from what happens on your job:
- Your measurements. Ground is not level, forms bow, beds have irregular edges. A slab poured a little thicker than planned uses noticeably more concrete.
- The reference values. The volume a bag makes, the weight of a cubic yard of gravel and the size of a bag are published figures for typical products. Yours may differ. Where sources disagree, the page shows the range.
- Waste. The starting percentage is only a starting point. For mulch and topsoil it is zero, because we found no authoritative figure.
When the number on the bag or from your supplier differs from the one a calculator used, go by the bag or the supplier.
Not professional advice
The calculators do not design anything. They do not tell you how thick a slab must be, how deep a footing must go, what mix to use or what your building code requires. For structural work, anything that carries a load, or anything that needs a permit, consult a qualified professional or your local building department.
Prices
The site has no prices of its own. An estimated cost is the quantity multiplied by the price you type in. It leaves out delivery, tax, tools and labor.
No guarantee
We check the formulas against published examples and list every source on the methodology page. Even so, we cannot guarantee that every result is right for your situation, and we accept no liability for decisions made from them. The terms say this in full.
Advertising
The site carries no advertising and no affiliate links. If that changes, pages that carry them will say so.
Found a mistake?
Use the “Report a problem” link under any result, or the contact page.