Lawn Seed Calculator
Estimate lawn-seed weight, full bags, purchased coverage, unused seed and material cost from lawn dimensions and the product application rate.
Default project preview
1 bags
Lawn area
1,500 ft²
Base seed weight
12 lb
Purchased seed
20 lb
Unused allowance
6.8 lb
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Seed weight = lawn area ÷ rate-area basis × product application rate × applications. The spreading allowance is added and bag quantity is rounded up.
FAQ
Lawn Seed Calculator questions
Do new lawns and overseeding use the same rate?+
Often not. New lawns commonly use more seed than overseeding, so follow the product label for the intended use.
Why add a spreading allowance?+
It covers overlap, calibration differences and irregular boundaries, but excessive seeding can also cause problems.
Does the calculator choose a grass species?+
No. Species and blend selection depend on climate, sunlight, soil, irrigation and intended use.