How Much Grass Seed to Repair a 500 sq ft Patch?
Calculate the pounds of grass seed needed to repair or reseed a 500 square foot bare patch in a lawn.
How to use this tool
- Measure your lawn area in square feet (length × width).
- Check the seed bag label for the recommended seeding rate in lbs per 1,000 sq ft.
- Add a 10% waste factor for uneven spreading.
- The calculator shows base seed needed and total to purchase.
Reseeding a bare patch in your lawn takes precise quantities — this calculator shows how much seed to buy for a 500 square foot area.
Frequently asked questions
- How much grass seed do I need per square foot?
- Seeding rate is usually given per 1,000 sq ft. New lawns typically need 5–8 lbs/1,000 ft², while overseeding an existing lawn needs 3–4 lbs/1,000 ft².
- When is the best time to seed a lawn?
- Cool-season grasses (fescue, bluegrass, ryegrass) seed best in early fall or spring. Warm-season grasses (bermuda, zoysia) establish best from late spring to early summer.