Grass Seed Calculator

Plan your perfect lawn! Estimate the amount of seed you'll need for a new lawn or for thickening up your existing grass.

Seed Needed (lbs) = (Area / 1000) × Seeding Rate (lbs per 1000 sq ft)
Scenario: A 2,000 sq ft new lawn.

Calculation:
1. Area: 2,000 sq ft.
2. Rate: 3.5 lbs per 1,000 sq ft.
3. Total: (2,000 / 1,000) × 3.5 = 7 lbs.

Result: You need approximately 7 lbs of grass seed.

How much grass seed do I need for a new lawn?

For a brand-new lawn, you typically need 3 to 4 pounds of grass seed per 1,000 square feet. This ensures dense coverage and helps prevent weeds from taking hold. Always check the specific seed bag for the manufacturer's recommended coverage rate.

What is the seeding rate for overseeding an existing lawn?

Overseeding requires less seed than a new lawn. Generally, 1 to 2 pounds of seed per 1,000 square feet is sufficient to thicken up a thinning lawn and improve its overall health and color.

When is the best time to plant grass seed?

For cool-season grasses (like Fescue or Kentucky Bluegrass), late summer to early fall is best. For warm-season grasses (like Bermuda or Zoysia), late spring to early summer is ideal when soil temperatures are consistently above 65°F.

How long does it take for grass seed to germinate?

Germination varies by grass type. Perennial Ryegrass can sprout in 5-10 days, while Kentucky Bluegrass can take up to 21-30 days. Consistent moisture is the most critical factor during the germination period.