# Grass Seed Calculator

## How to use the grass seed calculator?

Using the grass seed calculator is easy. To calculate how much grass seed you need for your lawn, follow these few simple steps:

**1.** Start by **choosing the shape of your lawn** and input its dimensions so that the calculator can determine its **area**:

- For a rectangular lawn, type in its
**width**and**length**. - For a circular lawn, type in its
**radius**. - For an elliptical lawn, put in the lengths of
**axis A**and**axis B**. - For a triangular lawn, put in the lengths of the
**base**and the**height**of the shape.

**2.** To get the **estimated amount of seeds** you need (in pounds or kilograms, as these are the units lawn grass seeds are typically sold in), input the **seed’s coverage rate**, and the grass seed calculator will return **how much grass seed do you need**.

## Using the grass seed calculator – example

Let’s go through an example of a lawn grass seed calculation:

- Imagine you want a circular lawn with a radius of 50 feet. To calculate the area of the circle, you will have to use the following formula:
`circle area = π * radius²area = π * (50ft)² = 7,854ft²`

- To calculate the amount of grass seeds you need, you have to know the coverage rate of your chosen species of grass. Let’s say your lawn grass has a CR of 5 pounds per 1000ft². Now, let’s calculate the number of seeds:
`seeds = coverage rate * area / 1000seeds = 5 * 7,854 / 1000 = 39.35 lbs`

- Thanks to these simple calculations we now know that to cover this area with grass, you need to buy 39.35 pounds of grass seeds.
- For the areas of the remaining shapes, the equations are as follows:
`rectangle area = width * lengthellipses area = axis A * axis B * πtriangle area = 1 /2 * height * base`

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