Grass Seed Calculator

How to use this calculator

Enter Area (sq ft), Pounds per 1,000 sq ft. The result updates in your browser as you edit an input. The prefilled values are examples only.

How the estimate works

Multiply area in thousands of square feet by the product rate printed on the label.

What can change the answer?

A product label can specify different application rates for new planting, overseeding, or maintenance. Keep the units aligned with the label and follow its safety directions.

Before relying on the result

Check that the figures use the same units and period. Compare the result against a current label, quote, contract, employer policy, or official dataset when appropriate. This estimate does not include factors you have not entered.

Further reference

For source data or a more detailed method, see NOAA: U.S. Climate Normals. The calculator does not automatically import data from this source.

Worked example with the default inputs

At an illustrative label rate of five pounds per 1,000 square feet, a 2,000-square-foot lawn requires 10 pounds of seed. This is product weight; choose the rate for the intended seeding operation.

Interpret the result in a planning record

Enter lawn area in square feet and the pounds of seed required per 1,000 square feet. The grass seed calculator scales that rate to your area. Check whether the label describes a new lawn or overseeding an existing one. These uses may call for different rates, and a geometric estimate cannot decide which seed or planting method suits your site.

Save the input values, units and result together. Change one uncertain input at a time so you can see which assumption moves the answer. A displayed decimal is arithmetic precision, rather than evidence that the measurements or rates are equally precise.

More tools

Read the How to Measure a Lawn and Read Product Rates guide →