How Much Grass Seed Do I Need? (2026 Guide)
How much grass seed do I need? A new lawn takes about 5–10 lb per 1,000 sq ft — a 2,000 sq ft yard ≈ 12 lb. Overseeding a thin lawn needs only 2–4 lb per 1,000 sq ft.
New lawn vs. overseeding: two different rates
Seed bags quote a rate per 1,000 sq ft, and which end of that range you need comes down to what you're doing. Seeding a new lawn onto bare soil means every seed has to carry the whole lawn, so the standard rate is 5–10 lb per 1,000 sq ft. Overseeding — sowing into an existing lawn that has thinned out — needs far less, 2–4 lb per 1,000 sq ft, because you're only filling gaps in turf that is already there.
Most estimates below use 6 lb per 1,000 sq ft for new lawns and 3 lb per 1,000 sq ft for overseeding, the midpoints of each range. The grass seed calculator lets you pick your own rate and bag size, then works out the exact number of bags.
How much seed for common lawn sizes
Multiply your lawn area (in thousands of sq ft) by the rate, or just read it off the table:
| Lawn area | New lawn @ 6 lb/1,000 sq ft | Overseeding @ 3 lb/1,000 sq ft |
|---|---|---|
| 500 sq ft | 3 lb | — |
| 1,000 sq ft | 6 lb | 3 lb |
| 2,000 sq ft | 12 lb | 6 lb |
| 5,000 sq ft | 30 lb | 15 lb |
| 10,000 sq ft | 60 lb | 30 lb |
These are planning numbers: seed is sold in 1-lb, 3-lb, 5-lb and 20-lb bags, so round up to the nearest whole bag. A 2,000 sq ft new lawn at 6 lb/1,000 is 12 lb — three 5-lb bags or one 20-lb bag with plenty to spare.
Worked example: seed for a 2,000 sq ft lawn
Let's run the numbers for a 2,000 sq ft lawn you're starting from bare soil:
1. Area in thousands: 2,000 ÷ 1,000 = 2. 2. Multiply by the rate: 2 × 6 = 12 lb of seed. 3. Convert to bags: 12 ÷ 5 = 2.4, so buy three 5-lb bags and keep the half-bag left over for patch repairs.
Coverage works the same way in reverse: one 5-lb bag at 6 lb per 1,000 sq ft covers about 830 sq ft (5 ÷ 6 × 1,000 ≈ 833). Overseeding the same lawn at 3 lb/1,000 drops the total to 6 lb — two 3-lb bags or just one 5-lb bag.
Getting the rate right: three tips
- Check your bag, not the average — the printed rate varies a lot by variety: tall fescue and ryegrass blends often call for 8–10 lb per 1,000 sq ft, while fine fescues and bluegrass mixes need less. The label on the exact bag you bought always wins over any rule of thumb.
- Loosen the soil before you sow — rake the top inch or two of bare soil, clear debris and break up clods so seed makes real contact; then roll or walk it in. Seed sitting on a hard surface germinates unevenly no matter how much you spread.
- Time it to the season — cool-season grasses germinate best in early fall or spring, warm-season grasses in late spring to early summer, and always wait for the last frost. Water lightly and often until seedlings are up.
Measuring a new lawn instead? Work out the area first, then compare your options: sod for a new lawn gives an instant green surface, while topsoil for a lawn tells you how much to spread before seeding.
FAQ
How much grass seed do I need per 1,000 square feet?
For a new lawn, sow 5–10 lb per 1,000 sq ft, with 6 lb a good mid-range target — a 2,000 sq ft lawn ≈ 12 lb. When overseeding a thin lawn, 2–4 lb per 1,000 sq ft is enough.
What is the difference between seeding a new lawn and overseeding?
New-lawn seeding goes onto bare soil to establish grass from scratch, so it uses a heavier rate of about 5–10 lb per 1,000 sq ft. Overseeding spreads seed into an existing, thinning lawn to thicken it up, so 2–4 lb per 1,000 sq ft usually does the job.
How large an area does a 5-lb bag of grass seed cover?
About 830 sq ft at the new-lawn rate of 6 lb per 1,000 sq ft (5 ÷ 6 × 1,000 ≈ 833). At the overseeding rate of 3 lb per 1,000 sq ft, the same bag stretches to about 1,700 sq ft.
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