Enter your Lawn Shape and dimensions — Length/Width, Radius, or Base/Height — and the Grass Seed Calculator returns your Grass Seed Needed, Total Lawn Area, Coverage Rate, and Estimated Seed Cost so you know exactly what to buy.
Grass Seed Needed
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Total Lawn Area
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Coverage Rate
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Estimated Seed Cost
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The amount varies by grass type and whether it's a new lawn or overseeding. New lawns typically need 2-8 lbs per 1,000 sq ft, while overseeding requires about half that amount.
Kentucky Bluegrass needs 2-3 lbs per 1,000 sq ft for new lawns, Perennial Ryegrass needs 5-9 lbs, Tall Fescue needs 6-12 lbs, and Fine Fescue needs 3-5 lbs per 1,000 sq ft.
For irregular shapes, break your lawn into smaller regular shapes (rectangles, circles, triangles), calculate each section separately, then add the totals together.
Yes, it's recommended to purchase 10-20% extra seed to account for uneven application, poor germination areas, or future spot repairs.
New lawn seeding requires full coverage rates, while overseeding existing lawns typically uses about 50% of the new lawn rate since you're filling in gaps rather than starting from bare soil.
Cool-season grasses (Kentucky Bluegrass, Fescue, Ryegrass) are best planted in early fall or early spring. Warm-season grasses (Bermuda, Zoysia) should be planted in late spring to early summer.
Germination time varies by grass type: Perennial Ryegrass (5-10 days), Tall Fescue (7-12 days), Kentucky Bluegrass (14-30 days), and Fine Fescue (7-14 days).