Seed quantity
lawn_area ÷ 1,000 × seed_rateScales the chosen pounds-per-thousand-square-feet rate to the lawn.
Inputs
Adjust the project details to update the estimate.
Planning estimates use standard formulas. Verify quantities with your supplier before ordering.
Estimate
A seed plan matched to the lawn area.
Grass seed
Estimated pounds using the selected grass and project rate.
40.0 lb
Starter fertilizer
A planning quantity that should be checked against the label.
20 lb
Material range
A purchase estimate before soil preparation, delivery, and labor.
$160–$320
Seed quantity: lawn_area ÷ 1,000 × seed_rate
Estimates use standard planning formulas. Verify quantities with your supplier or contractor before ordering.
See your project with AISeed and fertilizer
Lawn Calculator
Plan seed and starter fertilizer for a new lawn or an overseeding job. Choose a grass type so the coverage rate better matches your project.
Free to use Instant results Planning estimate
How to calculate grass seed
Measure lawn sections separately and subtract beds, paving, buildings, and tree rings. Add the remaining areas for the total seedable square footage.
A new lawn generally uses a different rate from overseeding, and grass varieties differ in seed size and recommended density. Use the calculator as a starting point, then follow the seed label.
Successful establishment also depends on soil preparation, timing, moisture, sunlight, and mowing height. Fertilizer should be selected and applied according to a soil test or product instructions.
Formulas used
Starter fertilizer
lawn_area ÷ 250Provides a simple planning quantity; the product label controls application.
Coverage check
seed_weight ÷ seed_rateShows the approximate area covered by the planned seed amount.
Frequently asked questions
What to know before you order.
How much seed do I need for a new lawn?
Multiply the lawn area in thousands of square feet by the recommended rate for the chosen grass. New lawns usually need more than overseeding.
Can I use this for overseeding?
Yes. Select overseeding so the estimate uses a lighter application rate than a bare-soil installation.
Should I fertilize at the same time?
Starter fertilizer can help, but soil testing and the product label should guide both product choice and timing.
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