Use this free grass seed calculator to plan a home-improvement or DIY project from the measurements and product information you already have.
HomeCalc shows the formula behind the result and keeps product-dependent assumptions editable where possible, so the calculation can match the material, package or supplier you actually plan to use.
Grass seed is normally specified as a weight per unit area. HomeCalc calculates lawn square footage and multiplies it by the pounds-per-1,000-sq-ft rate you enter.
FREE GRASS SEED ESTIMATOR
Grass Seed Calculator: Pounds of Seed Needed
Estimate grass seed quantity using lawn area and an editable pounds-per-1,000-sq-ft application rate.
Estimated result
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Use the seed rate for the exact grass product
Grass seed is normally specified as a weight per unit area. HomeCalc calculates lawn square footage and multiplies it by the pounds-per-1,000-sq-ft rate you enter.
lawn sq ft ÷ 1,000 × seeding rate = pounds of seed
What to check before using the result
- Use the seeding rate printed on the exact seed blend or species.
- New-lawn and overseeding rates can be different for the same product.
- Exclude patios, buildings and planting beds from the lawn area.
- Do not increase seed rate blindly; follow the product and local turf guidance.
Different grasses and uses can require very different application rates. A universal pounds-per-acre assumption would make the calculator less useful, so HomeCalc lets the product rate drive the result.