🌿 Grass Seed Calculator
Plan lawn renovations by converting area measurements and seeding rates into total seed requirements.
Check seed tag recommendations for species or overseeding vs. renovation.
How to Use This Calculator
Measure your lawn
Break irregular yards into rectangles or use mapping apps for acreage.
Enter recommended rate
Refer to your seed variety for ideal pounds per 1,000 sq ft.
Plan material purchase
Buy slightly extra seed for patching thin spots and calibration losses.
Formula
Seed (lb) = Area (sq ft) ÷ 1000 × Seeding Rate
Bags = Seed ÷ Bag Weight
Convert acres to square feet by multiplying by 43,560. Adjust seeding rate for overseeding (lower) versus new seedings (higher).
Full Description
Proper seeding rates ensure even turf establishment and reduce disease pressure. Overseeding helps fill bare spots, while renovations may require doubling the seeding rate depending on species.
Calibrate your spreader and split applications in two directions for uniform coverage.
Frequently Asked Questions
What seeding rate should I use?
Cool-season turf grasses range 2–6 lb/1,000 sq ft; warm-season blends vary. Follow seed tag guidance.
How do I adjust for slopes?
Increase rates slightly on slopes to account for erosion or wash-off.
Can I mix species?
Yes. Combine compatible species and calculate rates based on each component’s recommended coverage.
Should I seed before or after fertilizing?
Apply starter fertilizer at seeding to support root development, following label directions.