Grass Seed Calculator
Estimates pounds of grass seed needed based on lawn area and seed type
Length of the lawn area in feet
Width of the lawn area in feet
Type of grass seed
New lawn or overseeding existing grass
Enter length and width to calculate area
Select all options to see seed estimate
Number of 5 lb bags to purchase
Approximate seed cost
Frequently Asked Questions
How much grass seed do I need per 1,000 square feet?
It varies by grass type. Kentucky bluegrass needs 2-3 lbs, tall fescue needs 6-8 lbs, bermuda needs 1-2 lbs, and perennial ryegrass needs 6-8 lbs per 1,000 square feet for a new lawn. For overseeding, use half these rates.
What is the best grass seed for my climate?
Cool-season grasses (fescue, bluegrass, ryegrass) thrive in the northern US with cold winters. Warm-season grasses (bermuda, zoysia, St. Augustine) are best for the southern US with hot summers. The transition zone (mid-Atlantic to mid-South) can use either type.
What is the difference between seeding and overseeding?
Seeding is planting grass on bare soil for a new lawn. Overseeding is spreading seed over an existing lawn to fill in thin spots and improve density. Overseeding uses about half the seed rate because existing grass already covers part of the area.
When should I plant grass seed?
Plant cool-season grasses in early fall (mid-August to mid-October) when soil is warm but air is cool. Plant warm-season grasses in late spring to early summer when soil temperatures reach 65-70 degrees F. Avoid planting in extreme heat or cold.
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