Material Calculators

Every calculator here works the same way: enter the dimensions of your project and it returns how much to buy in that material's real unit. The bulk calculators — mulch, topsoil, compost, gravel, river rock, and sand — give cubic yards, cubic feet, bags, and approximate weight in tons. Concrete comes back in cubic yards plus a count of 60 lb and 80 lb bags. Paint is in gallons, sod in rolls and pallets, grass seed in pounds, and tile and pavers as a piece count. The sizing tools work from room or house size instead: the generator calculator returns running and starting watts, the AC calculator gives BTU and tonnage, and the ceiling fan calculator gives blade span and airflow.

To find your area, split the project into rectangles, multiply length by width in feet for each one, and add them up — an L-shaped bed is just two rectangles. For a circle, multiply the radius by itself and then by 3.14. Bulk materials also need a depth, which you enter in inches (2–3 inches for mulch, 4 inches for a concrete patio, and so on); the calculator handles the cubic-yard conversion (area × depth in feet ÷ 27) for you. Where the trade normally builds in a cushion, the result already includes it — 10% extra on concrete and tile, 5% on sod and pavers — so the number shown is what to actually order, not the bare minimum.

Frequently asked questions

How much extra should I order for waste?
It depends on the material and the layout. The concrete and tile calculators add 10% (push tile toward 15% for diagonal or busy patterns); sod and pavers add 5%. Straight runs waste less than curves and corners. For loose materials like mulch and gravel, order to your measured number and keep a bag or two in reserve.

How do I measure square footage?
Multiply length by width in feet for each rectangular section, then add the sections together. For a round area, multiply the radius by itself and by 3.14. Measuring to the nearest half-foot is close enough — rounding up slightly is cheaper than a second trip to the yard.

Do these account for depth?
The bulk-material calculators do. You choose a depth in inches and they convert to cubic yards, because mulch, gravel, and soil are filled to a thickness. Paint, tile, sod, and paver counts are driven by area alone, since those go down in a single layer.

Bagged or bulk — which should I buy?
Bags suit small jobs and are easy to haul. Bulk by the cubic yard is much cheaper once you pass roughly one yard, which is about 13–14 of the 2 cu ft mulch bags. Each calculator shows both the yardage and the bag count so you can compare before ordering.

Are the results exact?
They are solid planning estimates built on standard coverage rates. Confirm final quantities with your supplier, since bag yields, sod pallet sizes (usually 400–500 sq ft), and product coverage vary by brand.