How to measure a lawn for sod
Start by measuring the area you actually want covered in feet, not the whole lot. Skip the driveway, patio, walkways, and any beds you are not sodding. For a simple rectangular yard, multiply length by width to get square feet. For a lawn with a curved edge or an odd corner, break it into smaller regular shapes, rectangles and circles you can measure easily, calculate each one separately, and add the results together. A lawn shaped like an L is just two rectangles pushed together; a round planting bed cut out of a square lawn is a rectangle minus a circle. This calculator's preview panel scales to match what you enter, but the underlying math is exactly what you would do with a tape measure and a calculator: length times width for a rectangle, pi times radius squared for a circle.
If your yard slopes noticeably, keep in mind the sod will need slightly more material than the flat, bird's-eye measurement suggests, since the actual ground surface is longer than its horizontal projection. For most residential slopes this difference is small enough that the waste buffer below covers it, but a steep bank may need a separate estimate.
Slabs vs. rolls, and why pallet coverage differs
Sod ships in one of two formats, and which one you get usually depends on where you live and what grass you are planting. Warm-season grasses common in the southern United States, St. Augustine, Zoysia, Bermuda, Centipede, are typically cut and sold as slabs, individual pieces around 16 inches by 24 inches, about 2.67 square feet each. Cool-season grasses common in the north, tall fescue, Kentucky bluegrass, perennial ryegrass, are typically cut and rolled, with each roll around 2 feet by 5 feet, 10 square feet.
Slabs are heavier per square foot than rolls, since a roll is thinner and includes less soil per unit of coverage. That is the practical reason a slab pallet covers less ground than a roll pallet even though both are built to a similar maximum weight for a forklift or pallet jack: around 450 square feet of slabs weighs about as much as 500 to 600 square feet of rolled sod. Neither number is fixed by any industry body. It is simply what a given farm's harvester and pallet setup produces, which is why this calculator makes pallet coverage an editable field instead of a hardcoded constant.
Why order 5 to 15 percent extra
Straight edges along a driveway or fence line waste very little sod, but curves, tree rings, flower beds, and any cutting around obstacles use up whole pieces to fill small gaps. A simple rectangular lawn with few obstacles needs only about 5 percent extra. A typical yard with a walkway, a couple of trees, and a curved bed edge needs closer to 10 percent. A lawn with lots of curves, multiple beds, or a first-time installer doing the cutting should plan for 15 percent or more. It is far cheaper to have a handful of leftover pieces sitting on the driveway than to come up a few square feet short after the truck has already left, since fresh-cut sod dries out and starts to decline within about 24 to 48 hours of harvest and cannot simply be reordered same-day.
Why "confirm with your supplier" matters
Every number on this page, pallet coverage, piece size, pieces per pallet, is a reasonable industry-wide figure, not a guarantee from any specific farm. Sod is an agricultural product cut by machines that are set up differently from farm to farm, and a pallet built for a lighter cool-season grass will legitimately cover more ground than one built for a heavier warm-season variety. Before you place an order, ask your supplier three things: how many square feet their pallet covers, how big each individual piece is, and how many pieces are on a pallet. Those three numbers should be internally consistent (pieces times piece size should roughly equal pallet coverage), and having them in writing on your quote means you can catch a shortfall before delivery day instead of after.
Sod is not the only way to start a new lawn. Seed is slower to establish but far cheaper per square foot and offers more grass variety choices; if you are weighing the two, the grass seed calculator uses the same species-and-area approach to work out how many pounds a seeded lawn would take instead.
How to read a pallet quote
A sod quote should show quantity in pallets (since that is the delivery unit), the coverage per pallet, and the total square footage that covers. If a quote only lists square feet, ask for the pallet count and per-pallet coverage before you agree to a delivery slot. This matters because delivery trucks and pallet jacks are sized around whole pallets, a supplier cannot easily drop off half a pallet, and rounding up to the next whole pallet, exactly what this calculator does, is standard practice for that reason.
If you are also mulching the beds around your new lawn, the mulch calculator uses the same measure-and-add-up approach for depth and bags. Edging the lawn with a gravel border or path uses the same idea again, just sold by the ton instead of pieces or bags, see the gravel calculator. If the ground needs leveling or new soil before sod goes down, the topsoil calculator handles that layer.