Enter the area to be covered and the desired grass seed density into the calculator to determine the amount of grass seed needed in kilograms; this calculator can also evaluate any of the variables given the others are known.

Grass Seed Coverage Formula

The following formula is used to calculate the grass seed coverage:

C = (A * D) / 1000

Variables:

  • C is the amount of grass seed needed in kilograms
  • A is the area to be covered in square meters
  • D is the desired grass seed density in kilograms per square meter

To calculate the grass seed coverage, multiply the area to be covered by the desired grass seed density, and divide the result by 1000. This will give you the amount of grass seed needed in kilograms.

What is a Grass Seed Coverage?

Grass seed coverage refers to the area that a specific amount of grass seed can effectively cover when sowing a lawn. This measurement is usually given in square feet or square meters and can vary depending on the type of grass seed and the desired thickness of the lawn. The coverage rate is typically provided by the seed manufacturer and can be found on the seed packaging. It’s important to follow these guidelines to ensure that the grass grows evenly and densely. Over-seeding can lead to overcrowding and competition for resources, while under-seeding can result in sparse patches. The coverage rate may also depend on whether you’re seeding a new lawn or overseeding an existing one, as existing lawns typically require less seed.

How to Calculate Grass Seed Coverage?

The following steps outline how to calculate the Grass Seed Coverage.


  1. First, determine the area to be covered (in square feet).
  2. Next, determine the recommended seeding rate (in pounds per square foot).
  3. Next, gather the formula from above = Grass Seed Coverage = Area / Seeding Rate.
  4. Finally, calculate the Grass Seed Coverage.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Area to be covered (in square feet) = 500

Recommended seeding rate (in pounds per square foot) = 0.5