Grass Seed Calculator
Find how many pounds of grass seed you need for a new lawn or overseeding, by grass type, with a bag mix.
Change the values and press Calculate to work out your own figures.
Lawn area
Enter the area and choose the grass.
Show the working
- seed = area ÷ 1,000 × rate per 1,000 sq ft
Length and width
Enter the lawn's length and width.
Show the working
- seed = area ÷ 1,000 × rate per 1,000 sq ft
How to use it
Enter the area and choose the grass. Enter the lawn's length and width.
Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.
Key facts
seed = area ÷ 1,000 × rate per 1,000 sq ft overseeding rate = new-lawn rate ÷ 2
Rates vary
Seed blends and coated seed differ; the rate on your bag's label is the one to follow.
Questions
How much seed for 5,000 sq ft of bluegrass overseeding?
6.25 lb at 1.25 lb per 1,000 sq ft.
Formulas
seed = area ÷ 1,000 × rate per 1,000 sq ft overseeding rate = new-lawn rate ÷ 2
Sources
Limitations
- Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
- Tank results are the geometric volume; real tanks have wall thickness and fittings.