Grass seed take-off — area ÷ 1,000 × rate = pounds, then round up to bags
The take-off is area ÷ 1,000 × the species rate = base pounds, then round up to whole bags. A 5,000 ft² tall-fescue lawn: 5 × 8 = 40 lb base; the optional 10% touch-up buffer makes it 44 lb to buy = three 20-lb bags. The 10% is a purchase cushion for bare spots, never added to the seeding rate — extension rates are already as-sold bulk figures.
What this diagram shows
A left-to-right flow turning a lawn area into bags of seed, worked on a 5,000 square foot tall fescue lawn. First chip: area 5,000 square feet divided by 1,000 equals 5. Second chip: times the 8-pound tall fescue rate. Third chip: equals 40 pounds of base seed. Fourth chip: plus a 10 percent touch-up buffer equals 44 pounds to buy. An arrow drops to a result box that rounds up to whole bags — three 20-pound bags to cover the 44 pounds needed, drawn as three bag glyphs. A caution on the left states the 10 percent is a cushion for bare-spot repair, not a heavier seeding rate — doubling the rate hurts rather than helps. A note on the right states that extension seeding rates are already as-sold bulk figures, so no separate waste factor is baked in.
Grass Seed Calculator
Free grass seed calculator with extension-cited rates by species for new lawns, overseeding & winter overseed. Get pounds to buy, bags, and starter fertilizer.
