Grass Seed Calculator

Calculate how many pounds of grass seed you need for your lawn. Covers new lawns, overseeding, and different grass types.

Lawn Dimensions
ft
ft
sq ft
Seeding Rate: 2-3 lbs per 1,000 sq ft
$
lbs

Quick Tips

Best Time to Seed
Early Fall
Cool-season grasses
Warm-Season Grasses
Late Spring
Bermuda, Zoysia, Buffalo
Germination Time
7-21 days
Keep soil moist
Avoid Foot Traffic
4-6 weeks
Until grass establishes

Grass Seed Results

Calculated
Seed Needed
0 lbs
Kentucky Bluegrass
Bags Needed
0
5 lb bags
Lawn Area: 0 sq ft
Project Type: New Lawn
Seeding Rate: 2-3 lbs/1,000 sq ft
Tip: Use the higher amount for better coverage. Keep soil moist until grass establishes.

How Much Grass Seed Do I Need?

The amount of grass seed you need depends on your lawn size, the type of grass, and whether you're planting a new lawn or overseeding an existing one. Different grass types have different seeding rates.

Seeding Rates by Grass Type

Grass Type New Lawn (lbs/1000 sq ft) Overseeding
Kentucky Bluegrass2-31-2
Tall Fescue6-83-4
Perennial Ryegrass8-104-5
Bermuda Grass1-20.5-1
Zoysia Grass1-20.5-1
Buffalo Grass3-62-3
Fine Fescue4-52-3
Centipede Grass1-20.5-1

New Lawn vs. Overseeding

  • New lawn: Starting from bare soil requires more seed for full coverage
  • Overseeding: Adding seed to thin existing lawn needs about half the amount
  • Bare spot repair: Small areas need same rate as new lawn application

Best Time to Plant Grass Seed

  • Cool-season grasses: Early fall (best) or early spring
  • Warm-season grasses: Late spring to early summer
  • Avoid: Hot summer months and winter

Tips for Successful Seeding

  • Test and amend soil before seeding
  • Rake soil surface to create seed bed
  • Use a spreader for even distribution
  • Lightly rake seed into top 1/8" of soil
  • Keep soil consistently moist until germination
  • Apply starter fertilizer at planting
  • Avoid heavy foot traffic for 4-6 weeks

Choosing the Right Grass

  • Cool climates: Kentucky Bluegrass, Tall Fescue, Fine Fescue
  • Warm climates: Bermuda, Zoysia, Centipede, Buffalo
  • Shade tolerance: Fine Fescue, Tall Fescue
  • Heavy traffic: Perennial Ryegrass, Tall Fescue, Bermuda
  • Drought tolerance: Buffalo Grass, Bermuda, Zoysia