What does this tool do?
Seed rates are given in pounds per 1,000 square feet and vary between new lawns and overseeding. This calculator converts the lawn area into seed weight and rounds up to whole bags.
The Formula
Area = length × width; seed (lb) = area ÷ 1000 × rate; bags = ceiling(seed ÷ bag size)Frequently Asked Questions
What seed rate should I use?
New lawns often need 4 to 8 lb per 1,000 square feet depending on the grass, while overseeding uses roughly half. Check the rate on the seed bag for the specific mix.
When is the best time to seed?
Late summer to early autumn is ideal in many climates: the soil is warm, weeds are less aggressive and autumn rain helps establishment.