Lawn Seed Calculator
Calculate how much grass seed you need for your lawn
About this calculator
The Lawn Seed Calculator helps you determine the exact amount of grass seed needed for your lawn project, whether you're seeding a new lawn or overseeding an existing one. By calculating the precise seed quantity based on your lawn's dimensions and grass type, this tool prevents costly overbuying or disappointing results from under-seeding. Getting the right amount ensures optimal grass coverage, healthy growth, and eliminates waste while staying within your landscaping budget.
How to use
Simply measure and enter your lawn's length and width in feet to calculate the total square footage. Select your grass type from the dropdown menu, as different varieties require different seeding rates. The calculator will instantly display the exact amount of seed needed in pounds, ensuring proper coverage for successful lawn establishment.
Frequently asked questions
How much grass seed do I need per square foot?
Most grass types require 2-8 pounds per 1,000 square feet, depending on the variety. Cool-season grasses typically need more seed than warm-season varieties.
Should I use different amounts for new lawns vs overseeding?
Yes, new lawns require full seeding rates, while overseeding typically uses 25-50% less seed since you're filling gaps in existing grass.
What happens if I use too much or too little seed?
Too much seed causes overcrowding and weak grass growth. Too little results in thin, patchy coverage that's vulnerable to weeds and disease.