Grass Seed Calculator
Not sure how much grass seed your lawn needs? This Grass Seed Calculator helps Southern California homeowners estimate the right amount of seed for new lawns or overseeding existing grass—without overbuying or wasting product.
Because our climate, sun exposure, and watering restrictions are different from other regions, using a rough national estimate often leads to poor results. This calculator is designed with realistic lawn conditions in mind.
How to Use the Calculator
Measure the length and width of your lawn in feet
Enter the total square footage (exclude patios, walkways, and garden beds)
Select whether you are seeding a new lawn or overseeding an existing one
Select the type of grass
The calculator will estimate how much grass seed you’ll need
What the Results Mean
The amount of grass seed needed depends on how established your lawn already is.
New lawns require more seed to ensure full, even coverage. Overseeding uses less seed to thicken existing grass, repair thin areas, and improve overall density.
Results are estimates and can vary based on grass type, soil condition, watering consistency, and time of year. For best results, proper soil preparation and consistent watering are just as important as seed quantity.
Need Help With Seeding or Lawn Prep?
If you’re unsure whether your lawn needs overseeding, repair, or a full renovation, we can help. We offer lawn preparation, overseeding, and ongoing lawn care services throughout Southern California.
Contact us for a free estimate or an honest evaluation of your lawn’s needs.