Lawn & Garden
Enter lawn area directly in square feet, acres, square yards or square meters, then apply the seed-label rate and explicit allowance to estimate pounds and whole bags.
Direct answer
Seed weight = lawn area × application rate. Match the rate units to the area units, use the selected seed label for new-lawn versus overseeding rates, and round purchase quantity to the actual package size separately.
Primary search owner
Best matched searches: grass seed calculator · grass seed calculator per acre
Area-first mode
The application rate is not supplied by Home Measure Lab. Enter the rate from the selected seed label or project specification.
Enter the project measurements and product values that control this quantity.
Visual measurement check
The rectangle confirms lawn length and width before seed rate, extra allowance and bag rounding are applied. Planning diagram only. Numeric inputs are authoritative; verify field conditions, product instructions and applicable requirements before acting.
Diagram ready. Change a measurement to update this preview.
Project result
Estimate lawn area, seed weight with allowance, bag quantity and optional package cost.
At a glance
Planning estimate only. Verify product coverage, package size, supplier specifications and project requirements before purchasing.
Field execution geometry
Use the execution schedule with the live measurement diagram above. Numeric inputs and calculator results remain authoritative; verify field conditions, product instructions, code and structural requirements before construction or cutting.
Budget scenario
Use a current supplier subtotal or reuse a priced calculator result, then add optional delivery, tax and contingency. Home Measure Lab does not fetch or guess live prices.
Enter a current supplier subtotal or reuse a priced calculator result.
Budget values are local planning inputs, not live quotes. Verify tax treatment, delivery, labor and supplier pricing before purchasing.
Methodology
length × width
Use total seedable area.
area ÷ 1,000 × seeding rate
Rate should match the grass seed label and whether you are seeding new turf or overseeding.
base seed × (1 + extra allowance %)
Adds a small purchasing or application buffer.
planned seed ÷ bag size, rounded up
Whole packages are used for the purchase plan.
Measure the lawn area that will actually be seeded and subtract patios, buildings or established beds when they are significant. For irregular lawns, divide the space into rectangles and triangles or use a mapping measurement as a cross-check.
The most important input is the label seeding rate. New-lawn and overseeding rates can differ substantially, and seed blends vary by species. The calculator does not choose a grass type for your climate; it only converts your selected rate into a project quantity.
Reference
| Project type | Rate source | Why it matters |
|---|---|---|
| New lawn | Seed label new-lawn rate | Often higher than overseeding. |
| Overseeding | Seed label overseeding rate | Existing turf reduces required seed. |
| Patch repair | Product instructions | Small areas may use a different application method. |
| Seed blend | Exact package label | Species and blend composition affect recommended rate. |
Source evidence
These references document specific assumptions used or discussed on this page. The exact product label, technical data sheet, project drawings and applicable requirements take priority.
Supports: A manufacturer example shows different published coverage for a new lawn versus overseeding and instructs users to follow the product label.
Boundary: This is an example demonstrating why label rates differ; HomeMeasureLab does not use this product as a universal seed-rate default.
Questions
Use the rate printed on the exact seed product for your project type. This calculator intentionally keeps the rate editable instead of assuming one universal value.
No separate germination factor is applied. Use the product rate and your chosen extra allowance; seed quality, soil preparation and watering affect establishment.
Yes. Enter the overseeding rate from the product label rather than the new-lawn rate.
Planning guides
Lawn & Garden
Understand seeding rates per 1,000 square feet and why overseeding and new-lawn rates should come from the exact seed product.
Read guide →Estimate sod coverage and whole rolls, pieces or pallets from lawn area plus waste; use Sod Cost Calculator when the main question is material budget.
Open calculator → LandscapingEstimate general topsoil volume for lawns, grading and broad landscape areas; use Garden Bed Soil for raised or rectangular bed fill planning.
Open calculator → LandscapingEstimate mulch volume in cubic yards and bags with editable depth, allowance, package size, bag price and bulk price.
Open calculator →