Sod gives you an instant lawn, but it is perishable and sold in fixed quantities, so the order has to be right and the timing tight. This calculator converts your lawn dimensions into square feet, adds a trimming allowance, and breaks the total into rolls and pallets so you know exactly what to order and when to have it delivered.
How sod quantity is calculated
With waste = area × (1 + waste factor)
Rolls = area ÷ coverage per roll
Pallets = area ÷ ~450 sq ft per pallet
Sod waste is lower than for hard materials because turf can be cut and the offcuts laid into gaps, but you still lose some at curved edges and around obstacles. Five percent suits a clean rectangle; ten percent is wiser for a lawn with beds, trees and curves.
Measuring the lawn
- Rectangular lawns: length × width.
- Irregular lawns: split into rectangles and triangles, calculate each, and add. Subtract large beds and paved areas that will not be turfed.
- Curved edges: measure to the outer extent and rely on the waste allowance to cover the trimming.
Preparing the ground first
Sod only roots well into good soil. Before it arrives: clear the area of old grass and weeds, loosen the top few inches, level and lightly firm the surface, and ideally lay a few inches of quality topsoil amended with compost. The related topsoil and compost calculators size that base. Rake the surface smooth so the sod sits flat with no air pockets.
A worked example
A 40×25 ft back lawn, simple rectangle, 5% waste, rolls covering 10 sq ft:
- Area = 40 × 25 = 1,000 sq ft
- With 5% waste = 1,050 sq ft
- Rolls = 1,050 ÷ 10 = 105 rolls
- Pallets = 1,050 ÷ 450 = 2.3 → 3 pallets
Laying for a seamless lawn
Lay sod like brickwork — stagger the joints between rows so seams do not line up, and butt pieces tightly without overlapping or stretching. Start along a straight edge such as a path or driveway and work across. On slopes, lay the rolls across the gradient and peg them if needed. Cut around beds and trees with a sharp knife as you go.
The first two weeks decide everything
Fresh sod needs water immediately and generously — the soil beneath should stay moist, not waterlogged, for the first couple of weeks while roots take hold. Keep off the new lawn during this period, and delay the first mow until the sod resists a gentle tug, a sign it has rooted. Get the watering right and the seams disappear within weeks into a single, established lawn.
Preparing the ground for success
Sod lives or dies on what is underneath it. Before the pallets arrive, strip out old grass and weeds, then loosen the top few inches of soil so the new roots can penetrate rather than hitting a hard pan. Grade the surface smooth and to a gentle slope away from the house for drainage, and lightly firm it so the sod sits flat without air pockets. Laying a few inches of quality topsoil amended with compost gives the sod the best possible start — the related topsoil and compost calculators size that base. A day spent on ground prep does more for the lawn than any amount of fussing after it is laid.
Laying like a professional
Lay sod in a brickwork pattern, staggering the joints between rows so seams do not line up, and butt the pieces tightly together without overlapping or stretching them. Start along a long straight edge — a path, driveway or string line — and work across, kneeling on a board to avoid denting freshly laid turf. On slopes, run the rolls across the gradient rather than down it, and peg them if they threaten to slide. Cut around beds, trees and edges with a sharp knife as you go. Once a section is down, roll it lightly to press the roots into contact with the soil and remove air pockets.
The critical first weeks
Newly laid sod has almost no root system and depends entirely on you for water. Water it immediately and thoroughly, soaking through the sod into the soil below, then keep both consistently moist — not waterlogged — for the first two to three weeks while roots establish. This usually means watering daily, or more in heat. Stay off the new lawn during this period so you do not shift the pieces or compact the soft ground. Delay the first mow until the sod resists a gentle tug, the sign that roots have gripped, and keep that first cut high.
Timing and cost considerations
Sod can be laid through most of the growing season, but it establishes best in mild conditions — spring and early autumn — rather than the peak heat of summer, when keeping it watered is a constant battle. Order it to arrive the morning you are ready to lay, not before, because sod deteriorates on the pallet within a day or two. Sod costs considerably more than seed up front, but it delivers an instant, weed-free lawn and can be walked on far sooner, which for many projects justifies the premium. Buy slightly more than the area suggests to cover trimming and the odd damaged piece.
Estimating cost versus seed
Sod delivers an instant, weed-free, usable lawn, and you pay for that immediacy — it costs considerably more than seeding the same area, between the sod itself, delivery, and the labour of laying it. Seed is cheap but slow, taking weeks to establish and months to become a tough lawn, and it is vulnerable to washout, birds and weeds in the meantime. Sod's premium buys speed, erosion control on slopes, and a near-guaranteed result if watered properly. The calculator's square footage, roll and pallet figures let you price sod accurately and compare it against the seed alternative for your area and timeline. For a slope, a high-visibility front lawn, or a project needing the space usable quickly, sod usually justifies its cost; for a large, flat, patient back lawn, seed may make more sense. Either way, the ground preparation beneath is what determines the result, so do not economise there.
Frequently asked questions
How much sod do I need?
Measure your lawn area in square feet and add 5–10% for trimming and waste. A 40×25 ft lawn is 1,000 sq ft, or about 1,050 sq ft of sod with a 5% allowance — roughly 2.5 pallets.
How many square feet does a pallet of sod cover?
A standard pallet covers about 400 to 500 square feet, with 450 sq ft being a common figure. Pallet size varies by supplier and region, so confirm before ordering.
How big is a roll of sod?
A typical sod roll or slab covers about 10 square feet (often 2 × 5 ft), though sizes vary. Bigger rolls cover more but are heavier to lift and lay.
When should sod be laid after delivery?
As soon as possible — ideally within 24 hours. Sod is living grass and begins to deteriorate on the pallet, especially in heat. Order it to arrive when your soil is prepped and you are ready to lay.