Sod vs Seed Calculator
Price a new lawn both ways — sod pallets against pounds of grass seed — from one measurement, with the coverage figures US farms and bags actually use.
Length × width; split odd shapes into rectangles.
Overseeding an existing lawn uses roughly half the seed of bare ground.
Sod costs about $1,040 more here than seeding — the premium buys an instant lawn and a far wider planting window. Seed is cheaper but is season-critical and takes a year to establish fully.
What this calculator does
A new lawn is one measurement and two very different shopping lists. Sod is sold by the pallet and delivers a finished lawn the same day at a premium price. Seed is sold by the pound at a fraction of the cost and delivers the same lawn a year later, if the season and the watering cooperate.
This calculator prices both routes from the same area, so the premium you are paying for instant grass is a number rather than a feeling.
The sod arithmetic
Sod is cut into rolls or slabs and stacked on pallets, and the pallet is the ordering unit:
pallets = area ÷ coverage per pallet, rounded up450 square feet per pallet is the common US figure, but 400 and 500 exist regionally — confirm with the farm, because on a 5,000 square foot lawn the difference is a full pallet. A 2,000 square foot yard at 450 per pallet is 5 pallets, and at a typical delivered price that is real money before anyone has lifted a roll.
Two practical notes that outrank the arithmetic. Sod is perishable: it must go down within about 24 hours of harvest, less in summer heat, because it composts itself on the pallet. Prepare the ground before delivery. And a pallet weighs 1,500–3,000 pounds — plan where the truck drops it, because nobody moves one twice.
The seed arithmetic
Seed is dosed per 1,000 square feet, and the rate depends on the job:
pounds = area ÷ 1,000 × rate- New lawn on bare soil: about 6 lb per 1,000 sq ft for typical mixes
- Overseeding an existing lawn: about 3 lb per 1,000 sq ft
The same 2,000 square foot yard needs roughly 12 pounds of seed as a new lawn — usually a tenth the cost of the sod route or less.
Rates vary by species: bluegrass seed is tiny and doses low, tall fescue doses high, and the bag states its own figure. When the bag disagrees with a generic rate, believe the bag. And resist the more-is-better instinct — seed sown past the recommended rate produces crowded seedlings that compete with each other, not a thicker lawn.
What the premium actually buys
The gap between the two costs is the price of three things:
- Time. Sod is a lawn today; seed is dirt for weeks and thin grass for a season. A full year passes before a seeded lawn takes real traffic.
- A wider window. Sod can go down through most of the growing season. Seeding is season-critical — early fall for the cool-season grasses of the northern US, late spring for warm-season grasses across the South. Miss the window and most of the bag is wasted.
- Erosion control. On a slope, seed washes into the low corner with the first storm. Sod holds immediately, which is why it is standard on graded new-construction lots.
If none of those three matter to your situation, seed wins on price by a wide margin. If any of them does, the premium is usually worth paying.
What both routes need
The failure mode of new lawns is almost never the grass — it is the ground and the watering. Neither is included in the calculator:
- Soil preparation: kill or strip the old surface, till, grade, and rake. If the yard needs imported soil, note that topsoil is ordered by the ton like any aggregate — the gravel calculator includes a topsoil density, and how many tons of gravel explains the volume-to-weight conversion.
- Starter fertilizer, dosed per 1,000 square feet like the seed.
- Water, seriously. Sod needs daily soaking for the first weeks; seed needs the surface kept continuously moist until germination. Most dead new lawns died of a dry week.
For the hard-landscaping parts of the same project, the concrete calculator covers paths and pads, and beds around the new lawn are the mulch calculator’s territory.
Measuring the yard
Length × width, splitting odd shapes into rectangles — the same discipline as every other coverage estimate on this site. Subtract the house, the driveway and any beds, which on a typical lot removes more area than people expect. Measuring the whole parcel and papering over the difference with “waste” is how a five-pallet job becomes seven.
For regional guidance on species selection and planting windows — which matter more than any quantity on this page — your state extension service is the best free resource, and the USDA NRCS publishes the underlying soil data.
How this is calculated
sod: pallets = ceiling( area ÷ sq ft per pallet ) — 450 sq ft is common seed: pounds = area ÷ 1,000 × rate new lawn ≈ 6 lb per 1,000 sq ft · overseeding ≈ 3 lb
Frequently asked questions
- How much does a pallet of sod cover?
- Most US farms cut pallets that cover about 450 square feet, though 400 and 500 square foot pallets exist regionally. Confirm the figure with the farm before dividing, because a 10 percent difference in pallet size on a large lawn is a whole pallet either way.
- Is sod or seed better?
- They produce the same lawn on different timelines and budgets. Sod is an instant result, can be laid through most of the growing season, and costs several times more. Seed is far cheaper but is season-critical, vulnerable to washout and weeds, and takes a full year to establish. Neither survives without soil preparation and consistent watering.
- When should I seed a lawn?
- For the cool-season grasses that dominate the northern US, early fall is best — warm soil, cooler air and fewer competing weeds — with spring a second choice. Warm-season grasses across the South establish best in late spring and early summer. Seeding outside the window wastes most of the bag.
- How fast does sod need to be laid?
- Within about 24 hours of harvest, less in hot weather. It arrives as living grass rolled with an inch of soil, and it composts itself sitting on the pallet. Have the ground fully prepared before the truck arrives — sod delivered to an unready site is money on a countdown.
- How much should I overseed an existing lawn?
- At roughly half the new-lawn rate — about 3 pounds per 1,000 square feet for typical mixes. More is not better, either. Seedlings crowded past the recommended rate compete with each other and with the established grass, and most of the extra seed feeds the birds.