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Lawn seed coverage chart calculator
Put your lawn area, seeding rate and bag size in: 5,000 square feet at 6 lb per 1,000 square feet is 30.00 lb of seed, 1.20 bags exact in 25 lb bags — order 2.
★ CONSTRUCTION · HOME & GARDEN · LAWN SEED
Lawn Seed Coverage Chart: 30 Lb of Seed, Order 2 Bags
On the defaults — 5,000 square feet at 6 lb per 1,000 square feet in 25 lb bags — the lawn needs 30.00 lb of seed, 1.20 bags exact, so order 2 bags. This is the LAWN SEED version — seed by weight for a measured lawn — the sod-vs-grass-seed page is the SOD version — instant turf against seed by area; the seed-spacing-chart page is the SPACING version — seed by row spacing rather than by area; and the mulch-coverage-chart page is the MULCH version — coverage by volume for beds rather than by weight for lawns.
What does 30.00 lb of lawn seed mean?
It means a 5,000 square foot lawn seeded at 6 lb per 1,000 square feet needs 30.00 lb of seed, which is 1.20 bags exact in 25 lb bags — so you order 2 bags and keep the leftover 20 lb for patching thin spots later. The two figures answer different questions: seed needed tells you how much grass seed the lawn actually takes, while bags to order tells you what to buy, and the gap between them is the rounding-up that keeps you from running short mid-lawn. The part people get wrong is buying the exact figure: 1.20 bags cannot be bought, and buying 1 bag leaves 5 lb short — a fifth of the lawn unseeded. The other part people get wrong is the rate: a new lawn and an overseed do not take the same rate, and a rate picked for one job prices the other wrong by pounds, not ounces.
Lawn seed lookup table: 25 lb bags
Seed needed is area times rate divided by 1,000; bags exact is seed divided by 25 lb per bag, rounded up to whole bags. Read across from your lawn area to your seeding rate.
| Lawn area (sq ft) | Seeding rate (lb per 1,000 sq ft) | Seed needed (lb) | Bags exact (25 lb bags) | Order |
|---|---|---|---|---|
| 1,000 | 4 | 4.00 | 0.16 | 1 bag |
| 1,000 | 5 | 5.00 | 0.20 | 1 bag |
| 1,000 | 6 | 6.00 | 0.24 | 1 bag |
| 1,000 | 8 | 8.00 | 0.32 | 1 bag |
| 2,500 | 4 | 10.00 | 0.40 | 1 bag |
| 2,500 | 5 | 12.50 | 0.50 | 1 bag |
| 2,500 | 6 | 15.00 | 0.60 | 1 bag |
| 2,500 | 8 | 20.00 | 0.80 | 1 bag |
| 5,000 | 4 | 20.00 | 0.80 | 1 bag |
| 5,000 | 5 | 25.00 | 1.00 | 1 bag |
| 5,000 | 6 | 30.00 | 1.20 | 2 bags |
| 5,000 | 8 | 40.00 | 1.60 | 2 bags |
| 10,000 | 4 | 40.00 | 1.60 | 2 bags |
| 10,000 | 5 | 50.00 | 2.00 | 2 bags |
| 10,000 | 6 | 60.00 | 2.40 | 3 bags |
| 10,000 | 8 | 80.00 | 3.20 | 4 bags |
Three things to check before you trust the number
Is 5,000 square feet really the lawn, or the lot? Five thousand square feet is the seedable lawn area, and it is the figure the seed line turns on: the 10,000-square-foot branch needs 60.00 lb against the 30.00 lb headline, so doubling the area doubles the seed. Measure the lawn itself — length times width for each section, added together — and subtract the house footprint, driveway, beds, and paths, because seed spread on concrete grows nothing and the lot size overstates every order.
Is 6 lb per 1,000 square feet the right rate for your job? Six pounds is the seeding rate, and it is the figure the seed line turns on: the 4 lb branch needs 20.00 lb against the 30.00 lb headline, so a 2 lb rate difference is 10.00 lb over 5,000 square feet. New lawns generally take a heavier rate than overseeding, and grass types differ — check the bag label for your seed and your job, because a rate borrowed from a different grass is a different lawn, not a saving.
Is 25 lb really the bag you will buy? Twenty-five pounds is the bag size, and it is the figure the order turns on: the 50 lb bag branch orders 1 bag against the 2-bag headline, so the same 30.00 lb is one big bag or two small ones. Buy the bag size the store actually stocks — a 25 lb order priced against 50 lb bags is a short lawn, and a 50 lb order priced against 25 lb bags is a wasted trip.
Worked example
On the defaults: 5,000 square feet, 6 lb per 1,000 square feet, 25 lb bags.
- Seed needed: 5,000 × 6 ÷ 1,000 is 30.00 lb.
- Bags exact: 30.00 ÷ 25 is 1.20 bags.
- Bags to order: 1.20 rounded up is 2 bags — 50 lb bought, 30 lb spread, 20 lb left for patching.
- Check against the table: the 5,000 square foot row at 6 lb reads 30.00 lb, 1.20 bags exact, order 2 — the same answer two ways.
And the other way: the area behind 30.00 lb of seed is 5,000 square feet, the rate behind it is 6 lb per 1,000 square feet, and the bag size behind a 2-bag order is 25 lb. With 0 square feet the model honestly shows 0.00 lb and order 0 bags — an edge that shows the area is entered independently of the rate.
Every branch, checked
- 2,500 sq ft, same rate and bag size: 2,500 sq ft, same rate and bag size: 15.00 lb of seed — 0.60 bags exact, order 1 bag.
- 10,000 sq ft, same rate and bag size: 10,000 sq ft, same rate and bag size: 60.00 lb of seed — 2.40 bags exact, order 3 bags.
- 4 lb per 1,000 sq ft, same area and bag size: 4 lb per 1,000 sq ft, same area and bag size: 20.00 lb of seed — 0.80 bags exact, order 1 bag.
- 50 lb bag, same area and rate: 50 lb bag, same area and rate: 30.00 lb of seed — 0.60 bags exact, order 1 bag.
The reverses, worked backwards
- Area behind 30.00 lb of seed: 5,000 sq ft — at 5,000 sq ft the figures are 30.00 lb of seed — 1.20 bags exact, order 2 bags.; at the lower neighbor the figures are 24.00 lb of seed — 0.96 bags exact, order 1 bag.; at the upper neighbor the figures are 36.00 lb of seed — 1.44 bags exact, order 2 bags..
- Seeding rate behind 30.00 lb of seed: 6 lb per 1,000 sq ft — at 6 lb per 1,000 sq ft the figures are 30.00 lb of seed — 1.20 bags exact, order 2 bags.; at the lower neighbor the figures are 25.00 lb of seed — 1.00 bags exact, order 1 bag.; at the upper neighbor the figures are 35.00 lb of seed — 1.40 bags exact, order 2 bags..
- Bag size behind a 2-bag order: 25 lb bag — at 25 lb bag the figures are 30.00 lb of seed — 1.20 bags exact, order 2 bags.; at the lower neighbor the figures are 30.00 lb of seed — 1.50 bags exact, order 2 bags.; at the upper neighbor the figures are 30.00 lb of seed — 1.00 bags exact, order 1 bag..
What the defaults assume
The defaults are a 5,000 square foot lawn, 6 lb per 1,000 square feet, and 25 lb bags, so the headline is one mid-size lawn seeded at a standard rate with the most common bag size. The model is a multiplication, a division, and a round-up: seed is area times rate divided by 1,000, bags exact is seed divided by bag size, and bags to order is bags exact rounded up to the next whole bag. The area reverse is checked at 1,000 square feet either side, because 1,000 square feet at 6 lb is 6.00 lb; the rate reverse is checked at 1 lb either side, because 1 lb over 5,000 square feet is 5.00 lb; the bag reverse is checked at 5 lb either side, because bag size changes the order, not the seed. The model does not include waste, overlap, or spreader calibration — add 5–10% for those on a real job, and read the sod-versus-seed page before choosing seed over sod.
Output · formula · meaning
| Output | Formula | What it means |
|---|---|---|
| Seed needed | lawn area × seeding rate ÷ 1,000 | 30.00 lb — 5,000 × 6 ÷ 1,000. |
| Bags exact | seed needed ÷ bag size | 1.20 bags — 30.00 ÷ 25. |
| Bags to order | bags exact rounded up to whole bags | 2 bags — 1.20 rounded up. |
| Area behind a target seed weight | target seed × 1,000 ÷ seeding rate | 5,000 sq ft — 30.00 × 1,000 ÷ 6. |
| Seeding rate behind a target seed weight | target seed × 1,000 ÷ lawn area | 6 lb per 1,000 sq ft — 30.00 × 1,000 ÷ 5,000. |
| Bag size behind a target order | seed needed ÷ bags exact at that order | 25 lb bag — 30.00 ÷ 1.20. |
| Leftover seed after spreading | bags ordered × bag size − seed needed | 20.00 lb — 2 × 25 − 30.00, kept for patching. |
| 2,500 sq ft, same rate and bag size | same model | 15.00 lb of seed — 0.60 bags exact, order 1 bag. |
| 10,000 sq ft, same rate and bag size | same model | 60.00 lb of seed — 2.40 bags exact, order 3 bags. |
| 4 lb per 1,000 sq ft, same area and bag size | same model | 20.00 lb of seed — 0.80 bags exact, order 1 bag. |
| 50 lb bag, same area and rate | same model | 30.00 lb of seed — 0.60 bags exact, order 1 bag. |
| Area behind 30.00 lb of seed | reverse | 5,000 sq ft: 30.00 lb of seed — 1.20 bags exact, order 2 bags. |
| Seeding rate behind 30.00 lb of seed | reverse | 6 lb per 1,000 sq ft: 30.00 lb of seed — 1.20 bags exact, order 2 bags. |
| Bag size behind a 2-bag order | reverse | 25 lb bag: 30.00 lb of seed — 1.20 bags exact, order 2 bags. |
| 0 square feet | same model | 0.00 lb of seed — 0.00 bags exact, order 0 bags. |
| Negative area | same model | Lawn area — 0 or more square feet. |
| Negative seeding rate | same model | Seeding rate — 0 or more lb per 1,000 square feet. |
| Bag size 0 lb | same model | Bag size — more than 0 lb. |
Who uses this
- A homeowner seeding a lawn — 5,000 square feet at 6 lb is 30.00 lb and 2 bags, with the table giving the same answer for 1,000 to 10,000 square feet without retyping anything.
- A landscaper quoting a job — the branches price a bigger lawn or a lighter rate at once, so a quote can be checked against the table before seed is ordered.
- A garden-centre shopper — the bag-size branch shows whether one 50 lb bag or two 25 lb bags is the buy, so the trip is one trip, not two.
- A new homeowner overseeding thin spots — the rate note matters most here: overseeding takes a lighter rate than a new lawn, and the table keeps the two jobs apart.
Accuracy & limitations
Figures are the model’s own arithmetic on the numbers you type, computed from unrounded values and displayed rounded HALF_UP to 2dp. The main limitation is the inputs, not the arithmetic: whether the area is the seedable lawn rather than the lot, whether the rate matches your grass and your job, and whether waste and overlap are allowed for are all judgement calls, and this page prices the figures you enter without checking them. This page is a calculation tool, not landscaping advice.
Cite this calculator
Seed needed 30.00 lb, order 2 bags: 5,000 sq ft, 6 lb per 1,000 sq ft, 25 lb bags. Source: Bright Side Kit, https://brightoolbox.com/lawn-seed-coverage-chart/, accessed 29 October 2026.
Frequently asked questions
What counts as the lawn area?
The seedable lawn only: length times width for each lawn section, added together, minus the house footprint, driveway, beds, and paths. Seed spread on concrete grows nothing, so the lot size overstates every order.
What seeding rate should I use?
The rate on the bag label for your grass type and your job: new lawns generally take a heavier rate than overseeding, and grass types differ. This chart defaults to 6 lb per 1,000 square feet as a mid-range figure — check your bag before ordering.
Why round bags up instead of buying the exact figure?
Because bags are sold whole: 1.20 bags cannot be bought, and 1 bag leaves 5 lb short. The leftover from rounding up is not waste — it patches thin spots later in the season.
Should I add extra for waste and overlap?
On a real job, yes: add 5–10% to the seed figure for spreader overlap, edges, and spills. This chart shows the exact arithmetic; the waste allowance is your judgement on top of it.
What if my bag size is not 25 lb?
Type your actual bag size into the calculator: the seed figure does not change, but the order does — 30.00 lb is 2 bags at 25 lb and 1 bag at 50 lb, as the branches show.
How is lawn seed different from sod?
Seed is bought by weight and grows in over weeks, while sod is bought by area and gives an instant lawn at a higher price. The sod-versus-seed page compares the two; this chart prices the seed side only.