Grass Seed Calculator
Your estimate
Seed needed16 lb7.3 kg
- Rate (lb per 1,000 ft² / g per m²)
- 8
- Area
- 2,000 ft²222.22 yd² · 185.81 m²
Seed for a new lawn or for overseeding, using the seeding rate of each grass.
Updated 2026-10-20 · Based on: supplier bulk densities (gravel ≈ 1.4 tons per yd³).
How to use the Grass Seed Calculator
- Enter the lawn size.
- Choose the grass.
- Choose new lawn or overseeding (half rate).
Formula
Seed = area ÷ 1,000 × rate per 1,000 ft². New-lawn rates: tall fescue 8 lb, perennial ryegrass 8 lb, fine fescue 5 lb, Kentucky bluegrass 3 lb, bermuda 2 lb.
Worked example
With the values preset in the calculator above:
- Length
- 50 ft
- Width
- 40 ft
- Grass type
- Tall fescue
- Job
- New lawn
- Seed needed
- 16 lb (7.3 kg)
- Rate (lb per 1,000 ft² / g per m²)
- 8
- Area
- 2,000 ft² (222.22 yd²)
Frequently asked questions
How much grass seed per 1,000 sq ft?
Tall fescue: 7–9 lb for a new lawn. Kentucky bluegrass: 2–3 lb. Overseeding uses about half.
How much seed for 5,000 sq ft?
Tall fescue for a new lawn: 40 lb.
When is the best time to seed?
Cool-season grasses in early fall; warm-season grasses (bermuda, zoysia) in late spring.
More calculators
Estimates only — check quantities with your supplier and local building code before you order.