Grass Seed Calculator
Lawn & Garden · Updated July 2026
Enter your lawn area and seeding rate to find how many pounds of grass seed you need for a new lawn or overseeding.
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Estimates only. Add extra for waste and confirm with your supplier.
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How much grass seed do I need?
Multiply lawn area (in thousands of sq ft) by the seeding rate — about 5 lb per 1,000 sq ft for a new lawn, 3 lb for overseeding.
Seeding rates
Use about 5 lb of seed per 1,000 sq ft for a new lawn and 3 lb per 1,000 sq ft for overseeding. Rates vary by grass type — check the bag, since fine fescues and ryegrass differ from Kentucky bluegrass.
Getting good germination
Sow into loosened, raked soil, keep the surface consistently moist until seedlings establish, and hold off on mowing until the grass reaches about 3 inches. Spring and early fall give the best results.
How to use this calculator
- 1Measure your lawn area in square feet.
- 2Pick new-lawn or overseeding rate.
- 3Read the pounds of seed needed.
Frequently asked questions
How much grass seed per acre?
At 5 lb per 1,000 sq ft, an acre (43,560 sq ft) needs roughly 218 lb of seed for a new lawn.
How much grass seed do I need?
About 5 lb per 1,000 sq ft for a new lawn, 3 lb per 1,000 sq ft for overseeding.
How much grass seed for an acre?
At 5 lb per 1,000 sq ft, an acre needs roughly 218 lb for a new lawn.
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