Grass Seed Calculator
Find out how much grass seed to buy. Enter your lawn area and whether you’re seeding a new lawn or overseeding to get the pounds of seed needed and an estimated cost.
Your project
Estimate
Seed needed
- Lawn area
- 2,000ft²
- Estimated cost
- $48.00
Estimates are guidance only and exclude tax, labor, and site conditions unless stated. Confirm with a local pro.
How it's calculated
No black boxes — here is the exact math behind your estimate, so you can check it or adapt it for your own quote.
- 1
Lawn area (ft²) = length × width - 2
Pounds of seed = (area ÷ 1,000) × seeding rate - 3
Cost = pounds × price per pound
Worked example
A 50 ft × 40 ft new lawn seeded at 6 lb per 1,000 ft².
Inputs
- Lawn length
- 50 ft
- Lawn width
- 40 ft
- Seeding rate
- 6
- Price per pound
- 4 $/lb
Result
- Seed needed
- 12 lb
- Lawn area
- 2,000 ft²
- Estimated cost
- $48.00
Tools & materials for this project
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- Grass seed Pick a blend suited to your sun and climate.
- Broadcast spreader Spread seed evenly over the lawn.
- Starter fertilizer High-phosphorus feed to establish new grass.
Compare local pros for lawn seeding
An estimate gets you a budget. A few competing quotes get you the real price. Tell us about the job and we'll help you find vetted contractors nearby.
Grass Seed cost by state
The calculator does the quantity math exactly. What it can't know is what a fair unit price looks like where you live — lawn seeding runs 60% more in the priciest US market than the cheapest.
Grass Seed cost in all 50 states + DC US average $0.18 per square foot · regional averages, full ranked table, and typical project totals.