About DIY Calculator

DIY Calculator is a set of free calculators for home and garden projects: how much gravel, mulch, topsoil or concrete to order, how many tiles, pavers or blocks to buy, and how big an area really is.

How we calculate

Every calculator shows its formula under the result. Volumes are exact for the measurements you enter; weights use typical material densities, which vary by supplier, moisture and stone size — each calculator lets you change the density. Most calculators add a small extra percentage for waste, settling or cuts, which you can also change.

Results are estimates for planning and ordering. For structural work (foundations, retaining walls, load-bearing slabs), follow local building codes and a professional’s advice.

Privacy

The calculators run entirely in your browser. Nothing you type is sent to our server. See the privacy policy.

Contact

Found a mistake, or want a calculator we don’t have yet? Email hello@diycalculator.org.