How to calculate how much sod you need
Sod is priced by the square foot but delivered as pieces (also called slabs) or rolls stacked on pallets. So the math runs in three steps: measure the lawn area, add a little for waste, then divide by the size of each piece and the coverage of each pallet.
Pieces or rolls = sod to order ÷ sq ft per piece
Pallets = sod to order ÷ sq ft per pallet
Circle area = π × (diameter ÷ 2)²
Worked example: a 30 × 20 ft backyard with 16 × 24 in. pieces
- Area: 30 × 20 = 600 sq ft.
- Add 5% waste: 600 × 1.05 = 630 sq ft.
- Piece size: 16 × 24 = 384 sq in, and 384 ÷ 144 = 2.67 sq ft.
- Pieces: 630 ÷ 2.667 = 236.3, round up to 237 pieces.
- Pallets at 450 sq ft: 630 ÷ 450 = 1.4. That's one full pallet plus 180 sq ft, or two full pallets if your supplier only sells whole pallets.
Most yards aren't one clean rectangle. Split the lawn into rectangles and circles, measure each, and add them up. The square footage calculator handles rectangles, triangles, circles and L-shapes. Subtract patios, beds and walkways that won't get sod.
Sod piece and roll sizes
Piece size depends on the farm and the grass. Slabs are common for many warm-season grasses, while rolls are common in many northern markets. Ask your supplier what they cut before you order, and use the custom option if their size isn't listed.
| Piece or roll | Coverage each | Per 100 sq ft | Per 450 sq ft pallet |
|---|---|---|---|
| 16 × 24 in. piece | 2.67 sq ft | 37.5 | about 169 |
| 18 × 24 in. piece | 3 sq ft | 33.3 | 150 |
| 2 × 5 ft roll | 10 sq ft | 10 | 45 |
Pallets typically hold about 400–500 sq ft, but some farms load more or less depending on grass type and how thick the sod is cut. If your supplier quotes pieces per pallet, multiply by the piece size to get coverage and enter that number. Large commercial "big rolls" cover hundreds of square feet each and need equipment to lay, so they aren't a typical DIY option.
A full pallet is heavy, often a ton or more depending on moisture and soil. Have it dropped as close to the work area as possible and keep the driveway clear.
Prepare the soil first
Sod rarely fails because of the grass. It fails because the soil under it was compacted, bare or poorly graded. Do this before delivery day:
- Remove the old lawn and weeds. A rented sod cutter is the fastest way. Don't lay new sod over existing grass; the roots can't reach the soil.
- Test the soil. Your county extension office can test pH and nutrients and recommend lime or fertilizer.
- Loosen the top 4–6 in. and mix in compost if the soil is heavy clay or sand. If you need to build up the grade, 4–6 in. of good topsoil gives new roots a lot to work with. Use the topsoil calculator to figure cubic yards; for 600 sq ft at 4 in., it's 7.41 cu yd.
- Grade it. Slope the soil gently away from the house and rake out low spots. Finish the soil about 1 in. below sidewalks and driveways so the sod ends up flush.
- Firm and moisten. Roll the area lightly with a half-full lawn roller, then water the day before the sod arrives. Lay sod on damp soil, not dry, dusty soil.
How to lay sod
- Start along the longest straight edge, such as a driveway or sidewalk.
- Push each piece tight against the last one without overlapping or stretching. Gaps dry out and shrink.
- Stagger the joints like bricks in a wall, offsetting each row by about half a piece, so seams don't line up.
- Cut around beds, trees and curves with a sharp utility knife or flat spade. Avoid small slivers along edges; they dry out first. Put full pieces at the edges and do the cutting toward the middle where you can.
- On slopes, lay rows across the slope and pin pieces with sod staples.
- Roll the finished lawn to press the roots into the soil, then water right away.
Watering new sod
This is general guidance; your sod supplier's instructions, your climate and any local watering restrictions come first.
| When | What to do |
|---|---|
| Install day | Water each section within about 30 minutes of laying it. Soak until the soil under the sod is wet; lift a corner to check. |
| First 1–2 weeks | Keep the sod and the soil beneath it moist. That usually means daily watering, sometimes twice a day in hot, dry weather. |
| Weeks 2–4 | Once the sod resists a gentle tug, water less often but more deeply to push roots down. |
| After it roots | Switch to a normal schedule, often about 1 in. of water per week including rain, adjusted for grass type, soil and heat. |
Keep foot traffic off new sod until it roots, typically 2–3 weeks. Make the first mowing at a high setting and never take off more than a third of the blade.
When to install sod in the US
- Cool-season grasses (Kentucky bluegrass, tall fescue, fine fescue, perennial ryegrass), common in the northern US and much of the transition zone: early fall is usually best, followed by spring. Mild temperatures and fall rain help roots establish before winter.
- Warm-season grasses (Bermuda, zoysia, St. Augustine, centipede, bahia), common in the South: late spring through summer, while the grass is actively growing. Laying it late in fall leaves little time to root before it goes dormant.
Sod can be laid almost any time the ground isn't frozen, but it roots fastest and needs the least water during its active growing season. In summer heat, expect to water more.
Edging the new lawn with beds? The mulch calculator covers those. For a patio next to the lawn, see the paver calculator.
Frequently asked questions
How much sod is on a pallet?
Typically about 400–500 square feet, but it varies by farm and grass type. A 450 square foot pallet holds about 169 pieces of 16×24 inch sod or 45 rolls of 2×5 foot sod. Ask your supplier for their exact coverage.
How many pieces of sod do I need for 1,000 square feet?
With 16×24 inch pieces (2.67 sq ft each), you need 375 pieces with no waste, or 394 with a 5% allowance. With 2×5 foot rolls (10 sq ft each), you need 100 rolls, or 105 with 5% waste.
How much extra sod should I order?
Order 5% extra for simple rectangular lawns and 10% or more for yards with curves, planting beds, trees and other obstacles that require cutting.
Can you lay sod over existing grass?
It is not recommended. The old grass and roots keep the new sod from making good contact with the soil, and the dying grass underneath can leave the lawn uneven. Remove the old turf first and loosen the soil.
How long before you can walk on new sod?
Keep foot traffic to a minimum for about 2–3 weeks, until the roots grip the soil and the sod resists a gentle tug. Light walking to move hoses is fine; heavy use and play should wait.
How much topsoil do I need before laying sod?
If your existing soil is poor or you need to raise the grade, 4–6 inches of topsoil is a common target. For 1,000 square feet at 4 inches, that is about 12.3 cubic yards. Use the topsoil calculator for your exact area.
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