How Much Sod Do I Need?

Don't order a spare pallet

Every other material calculator on this site tells you to buy a little extra. This one doesn't, and the reason is that sod is alive.

It's harvested to order, usually cut within a day of delivery, and should be laid within about 24 hours in mild weather — much less in heat, where a stacked pallet begins composting in the middle from its own warmth.

Spare tile keeps for years. Spare sod is a pallet of dying grass and a disposal problem.

The arithmetic

A 40 × 30 lawn:

40 × 30 = 1,200 sq ft

+10% waste = 1,320 sq ft (146.7 sq yards — sod is often priced by the yard)

÷ 450 sq ft per pallet = 2.93 → 3 pallets, covering 1,350

Ask what a pallet actually holds

It varies by region and supplier, commonly 400–500 sq ft, which is why the calculator asks rather than assuming.

Worth knowing before it turns up: a full pallet is very heavy, and heavier again after rain. Check the delivery access and have a plan for moving it before it's sitting on your drive.

How much waste

Lawn	Allowance
Rectangular, straight edges	10%
Curves, island beds, tree rings	15–20%

Curves cost more than they look. Every curved edge means cutting a straight piece to fit, and unlike a straight offcut, the leftover wedge rarely fits anywhere else.

Measure in rectangles

Break an irregular lawn into rectangles, work out each, and add the areas before applying waste.

Measuring the bounding box of an L-shaped lawn includes ground that isn't lawn — you'd be paying for grass to cover a flower bed.

The preparation is the job

The arithmetic here takes five minutes. The work that decides whether the lawn lives takes far longer, and all of it has to happen before delivery — because of the clock.

• Clear the old turf, weeds and debris
• Grade so water runs away from buildings
• Till, and work in any soil amendment
• Rake level and lightly firm

Sod laid on unprepared ground fails in a way that's expensive and completely visible. And you can't do the preparation after it arrives, because by then you're racing.

Treat the delivery date as the start of a countdown, not the start of the project.

Laying it

• Start along the longest straight edge
• Stagger the joints like brickwork — never line them up
• Butt edges tight; gaps dry out and never close
• Cut curves with a sharp knife against the finished edge
• Don't stretch pieces to close a gap — they shrink back and leave one
• Roll or firm it so the roots contact soil
• Water deeply the same day, and keep watering for weeks
• Stay off it while it roots

That last pair is where most new sod actually fails. It needs far more water, for far longer, than people expect.

Sod or seed?

Different trade-offs, not better and worse.

Sod is an instant lawn, lays across a wider seasonal window, and resists erosion immediately — which genuinely matters on a slope. It costs considerably more per square foot and demands heavy consistent watering to root.

Seed is far cheaper and establishes deeper roots over time, but takes weeks to look like anything and is vulnerable to rain washing it out, birds, and being walked on.

Print the ordering and laying sheet — the "before delivery" checklist is the half that matters.