Grass Seed Calculator
Free grass seed calculator—estimate pounds from lawn area and seeding rate.
Results
5Pounds to buy
- 5Exact pounds
How it works
Pounds = (area ÷ 1,000) × seeding rate (lb per 1,000 sq ft). We round up for purchase.
Worked example
Example: 5,000 sq ft lawn at 4 lb / 1,000 sq ft → 20 lb exact, so buy 20+ lb bags to cover.
New lawn vs overseeding
New lawns usually need a higher rate than overseeding. Check the seed bag—cool-season blends and warm-season varieties differ a lot.
Typical rates
Many cool-season mixes use roughly 3–6 lb per 1,000 sq ft for overseeding and more for bare soil. Always prefer the manufacturer’s chart.
Soil prep tips
Rake bare spots, water lightly after seeding, and keep the surface moist until germination. Seed alone cannot fix compacted or shady soil problems.
Frequently asked questions
How much grass seed per 1,000 square feet?
It depends on the mix. Many bags list separate rates for new lawns and overseeding—use that number in the calculator.
Can I use this for sod instead?
Use the Sod Calculator for pallet coverage. Seed and sod are sized differently.
Should I buy extra seed?
Rounding up helps with uneven spreading and thin spots. Keep leftover seed sealed and dry for touch-ups.
Estimates only. Verify coverage rates and local requirements before purchasing materials. Not a substitute for professional advice.