Free tool
Grass Seed Calculator
Seeding rates vary a lot by grass species and whether you're starting from bare soil or overseeding existing turf. Pick your grass type and get the right number for both.
Seed needed
35.0 lb
Rate used
7 lb / 1,000 sq ft
How this is calculated
Seed needed (lb) = (area ÷ 1,000) × the seeding rate (lb per 1,000 sq ft) for your grass type and application.
New-lawn rates are higher than overseed rates because you're establishing a full stand from bare soil rather than filling gaps in existing turf. Rates are based on commonly cited university extension seeding guidelines; see our grass seed & sod guide for species-specific planting windows.