Grass Seed Calculator
Calculate the amount of grass seed needed for new lawn installation or overseeding projects
About this calculator
This grass seed calculator helps homeowners and landscapers determine the precise amount of grass seed required for lawn installation or overseeding projects. By calculating seed quantities based on lawn area and grass type, it prevents costly over-purchasing while ensuring adequate coverage for healthy, uniform grass growth. The tool accounts for different seeding rates required by various grass species and project types.
How to use
Enter your lawn's dimensions in square feet or measure length and width to calculate area automatically. Select your grass type from the dropdown menu, then choose whether you're seeding a new lawn or overseeding an existing one. The calculator instantly provides the recommended seed quantity in pounds.
Frequently asked questions
How much grass seed do I need per square foot?
New lawns typically need 2-8 pounds per 1,000 square feet depending on grass type. Overseeding requires about half that amount for existing lawns.
What's the difference between new lawn and overseeding rates?
New lawns require 2-3 times more seed than overseeding since you're establishing grass from bare soil versus filling existing lawn gaps.
Should I buy extra seed beyond the calculated amount?
Purchase 10-15% extra seed to account for areas that may need reseeding and to ensure consistent coverage across the entire lawn area.