Grass Seed for 4,000 Square Feet
For 4,000 sq ft at a overseeding rate of 3 lb per 1,000 sq ft, you need about 12 lb of grass seed (1 bags). Switch between new-lawn and overseeding rates below.
Grass seed
12 lb
Lawn area
3,969 sq ft
Seed needed
11.9 lb3 lb per 1,000 sq ft
25-lb bags
1 bag
Cost (est.)
$71~$6/lb
Doing this for work? Estimate the whole job in minutes.
JRIQ turns plans and site photos into full material + labor estimates with AI — built by the team behind these calculators.
Try it free →
Want the full guide — tools, step-by-step, common mistakes and FAQ? See the Grass Seed Calculator.