Grass Seed Calculator | LandscapeCalculating.com

Grass Seed CalculatorSeeding and overseeding rates by species, with straw or hydro-mulch coverage.Free grass seed calculator with formulas, waste factors, cost estimates and professional guidance.Formula: pounds of seed = (area ÷ 1,000) × seeding rate per 1,000 sq ftHow to use this calculator

Match the rate to species and purpose — overseeding uses roughly half the new-lawn rate.

Seed cool-season grasses in late summer to early fall, warm-season once soil holds above 65°F.

Apply starter fertilizer and keep the top 1/4 in of soil moist for 14–21 days.

Frequently asked questions

How much grass seed per 1,000 sq ft?

Tall fescue 7–9 lb new or 4–5 lb overseed, Kentucky bluegrass 2–3 lb, perennial rye 6–8 lb, hulled bermuda 1–2 lb.

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