Mis à jour July 2026

Lawn Square Footage Calculator

Measure your grassed area, subtract the house, driveway, and beds, and get the exact square footage that sod, seed, fertilizer, and weed control are sold by.

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Longueur du terrain

Largeur du terrain

Utilisez la surface totale pour planifier le gazon, le paillis, les semences ou la clôture. Divisez les terrains irréguliers en rectangles et additionnez les résultats.

Surface du terrain

4,000sq ft

Yards carrés

444.4 yd²

Acres

0.092 ac

1 acre = 43,560 sq ft. Le gazon et les semences se vendent généralement au pied carré ou au yard carré.

Ce que cela signifie

To calculate lawn square footage, measure the length and width of the grassed area in feet and multiply them (length × width). Subtract everything that isn't grass — the house footprint, driveway, patio, and planting beds. For irregular yards, split the lawn into rectangles, measure each, and add them together. This total drives how much sod, seed, fertilizer, and weed control to buy, since they're rated per 1,000 sq ft or per sq ft.

Formule et guide

Comment le calcul est effectué

A lawn is measured as area — length times width of the grass, minus every hard surface and bed inside the lot. Odd shapes are just a set of rectangles added together.

1Measure the overall length and width of the lot in feet and multiply them for the gross area.
2Measure the house footprint, driveway, patio, and beds, then add those non-grass areas together.
3Subtract the non-grass total from the gross area to get the actual lawn square footage.
4For an irregular yard, split the lawn into rectangles, calculate each, and sum them instead.

Exemple résolu

En chiffres

Lot area (80 ft × 60 ft)	4,800 sq ft
House footprint	− 900 sq ft
Driveway + walkway	− 300 sq ft
Lawn to treat	3,600 sq ft

80 ft × 60 ft lot = 4,800 sq ft, minus 1,200 sq ft of house and driveway = 3,600 sq ft of lawn.

Précision et hypothèses

Subtract every non-grass area — house, garage, driveway, patio, and planting beds — from the lot size.
Split irregular or curved yards into rectangles, measure each, and add them for the total.
For large yards, pace it off (a stride is roughly 3 ft) or use a measuring wheel instead of a tape.
One acre equals 43,560 sq ft, so divide your lawn area by 43,560 to convert to acres.

Conseils et règles clés

Sod is sold by the square foot and by the pallet — a pallet covers roughly 450–500 sq ft.
Grass seed is rated per 1,000 sq ft, with new lawns needing about double the overseeding rate.
Fertilizer, weed control, and lime bags all list coverage per 1,000 sq ft on the label.
Round the lawn figure up when buying — it's cheaper to have a little extra than to come up short.

Cas d'usage

À qui s'adresse cette calculatrice

Sod and seed ordering

Divide your lawn square footage by a pallet's coverage for sod, or by 1,000 to read seed bag rates.

Fertilizer and treatments

Fertilizer, weed-and-feed, and lime are dosed per 1,000 sq ft — your total tells you how many bags to buy.

Robotic mower sizing

Robotic mowers are rated by maximum coverage area, so match the model to your lawn's square footage.

How to measure lawn square footage accurately

Lawn square footage is the total area of grass you actually mow, seed, and treat — not the size of your whole lot. That distinction matters, because everything you buy for a lawn is priced by the area it covers. Start with the gross rectangle: measure the length and width of the property in feet and multiply them. Then measure each surface that isn't grass — the house and garage footprint, the driveway, walkways, the patio, and any planting beds — and subtract that total. What's left is the number sod and seed are sold by.

Most yards aren't a single clean rectangle, so the reliable approach is to break the lawn into pieces. Sketch the yard from above, draw each grassed section as its own rectangle, and measure the length and width of each. Multiply length by width for every piece and add them together. If you'd rather measure the whole property first, our yard calculator handles the same open-area math, and this page focuses on subtracting out the hard surfaces to leave just the turf.

Measuring big or irregular lawns

For a large lawn, a tape measure is slow and inaccurate on its own. Pace the distances instead — count your steps across a run and multiply by your stride length, which is close to three feet for most adults. A measuring wheel is more precise and worth borrowing for an acre or more. For curved edges, don't chase the curve; draw the largest rectangle that fits inside the lawn, then add smaller rectangles or triangles to fill the gaps until your shapes roughly cover the grass.

Once you have the square footage, converting to acres is easy: divide by 43,560. A 3,600 sq ft lawn is about 0.08 acres, while a half-acre lot has roughly 21,780 sq ft before you subtract the house. When you're ready to price the job, feed the lawn area into the cost calculator with your price per square foot for sod or per bag for seed and fertilizer.

Turning square footage into what to buy

Lawn products come in two rating systems, and your square footage plugs straight into both. Sod is sold by the square foot and by the pallet, where a pallet typically covers 450 to 500 sq ft — so a 3,600 sq ft lawn needs about eight pallets. Seed, fertilizer, weed control, and lime are all dosed per 1,000 square feet, so divide your lawn area by 1,000 to read the bag rate directly. A 3,600 sq ft lawn is 3.6 units of coverage.

Always round up. Edges, overlap, and uneven spreading mean real-world coverage runs a little short of the label, and a second trip to the store for one more bag costs more than the extra you'd have on the shelf. For new lawns and bare-patch repair, use the higher seeding rate on the bag, which is often close to double the maintenance overseeding rate.

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FAQ

FAQ de la calculatrice Lawn

Measure the length and width of the grassed area in feet and multiply them, then subtract everything that isn't grass — the house, driveway, patio, and beds. For an 80 ft by 60 ft lot that's 4,800 sq ft; take off 1,200 sq ft of house and driveway and you have 3,600 sq ft of lawn to seed or sod.

Split the lawn into rectangles. Sketch the yard from above, draw each grassed section as its own rectangle, and measure the length and width of each in feet. Multiply length by width for every piece and add them together. For curved edges, fit the largest rectangle inside the grass, then add smaller rectangles to cover the leftover strips.

One acre is 43,560 square feet. To convert your lawn to acres, divide its square footage by 43,560 — a 3,600 sq ft lawn is about 0.08 acres, and a half-acre is roughly 21,780 sq ft. Remember that lot acreage includes the house and driveway, so your actual grass area is smaller.

Read the coverage rate on the bag and divide your lawn area by 1,000. A 3,600 sq ft lawn is 3.6 units, so multiply that by the per-1,000 rate. New lawns and bare patches use roughly double the overseeding rate. Round up when buying, since edges and uneven spreading make real coverage fall a little short of the label.

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