A 50 lb bag of grass seed covers between 5,000 and 25,000 square feet depending on the grass type and whether you’re starting a new lawn or overseeding. Here’s the quick answer:
| Grass Type | 50 lb Bag — New Lawn (sq ft) | 50 lb Bag — Overseeding (sq ft) |
|---|---|---|
| Kentucky Bluegrass | 14,286 | 28,571 |
| Tall Fescue | 5,556 | 11,111 |
| Perennial Ryegrass | 6,667 | 13,333 |
| Bermuda Grass | 14,286 | 28,571 |
| Fine Fescue | 10,000 | 20,000 |
| Zoysia Grass | 25,000 | 50,000 |
Coverage by Bag Size
Not buying a 50 lb bag? Here’s coverage for every common bag size using Tall Fescue (9 lbs/1,000 sq ft) as the example, since it’s the most popular grass type in the US:
| Bag Size | New Lawn Coverage (sq ft) | Overseeding Coverage (sq ft) | Typical Price |
|---|---|---|---|
| 1 lb | 111 | 222 | $4–$8 |
| 5 lb | 556 | 1,111 | $15–$25 |
| 10 lb | 1,111 | 2,222 | $25–$40 |
| 25 lb | 2,778 | 5,556 | $40–$65 |
| 50 lb | 5,556 | 11,111 | $55–$90 |
Why Coverage Varies by Grass Type
The difference comes down to seed size and density. Small seeds like Kentucky Bluegrass contain roughly 2.2 million seeds per pound, so a little goes a long way. Large seeds like Tall Fescue have only about 227,000 seeds per pound, requiring more weight for the same ground coverage.
New Lawn vs. Overseeding — Same Bag, Different Coverage
The same bag covers twice the area when overseeding compared to a new lawn. This is because overseeding rates are 50% of new-lawn rates — existing turf already occupies the ground.
For a new lawn: 1 bag of Tall Fescue covers ~5,500 sq ft. For overseeding: the same bag covers ~11,000 sq ft. Always check the bag label — different brands may use slightly different rates.
How Many Bags Do I Need for My Lawn?
Use our grass seed calculator for precise bag counts. Enter your lawn dimensions, select your grass type, and the calculator shows exact lbs needed plus estimated bag count based on standard sizes (5, 10, 25, or 50 lbs).
Enter dimensions → select grass type → see bags needed.
Open CalculatorFrequently Asked Questions
Is a 50 lb bag enough for 1/4 acre?
1/4 acre = 10,890 sq ft. For Kentucky Bluegrass (3.5 lbs/1,000 sq ft), you need ~38 lbs — one 50 lb bag is enough with seed left over. For Tall Fescue (9 lbs/1,000 sq ft), you need ~98 lbs — you’d need two 50 lb bags. For large areas, see our per acre guide.
Does bag coverage account for waste and overlap?
No. Coverage numbers assume 100% of the seed lands on target. In practice, 5–15% is lost to wind, uneven spreading, birds, and overlap between passes. Add a 10% buffer to your calculated amount — our calculator has a buffer slider built in.
Are smaller bags more expensive per pound?
Yes. A 5 lb bag typically costs $3–$5 per pound, while a 50 lb bag drops to $1–$1.80 per pound. If your lawn needs more than 25 lbs, buying a single 50 lb bag is almost always more economical than multiple smaller bags.