Lawn Area Calculator

Enter Calculation

Section 1 Length (ft)

Section 1 Width (ft)

Section 2 Length (ft)

Section 2 Width (ft)

Section 3 Length (ft)

Section 3 Width (ft)

Results

Total Lawn Area

1,000

square feet

Square yards	111.11 yd²
Square meters	92.9 m²
Acres	0.023 ac

What Is the Lawn Area Calculator?

This tool estimates the total surface area of your lawn or yard so you can buy the right amount of grass seed, sod, fertilizer, or weed control. Because most yards aren't a single neat rectangle, the calculator lets you break your lawn into up to three rectangular sections and adds them together. The result is shown in square feet, square yards, square meters, and acres.

How to Use It

Walk your yard and measure each rectangular patch of grass with a tape measure or measuring wheel. For irregular shapes, divide the lawn into the closest rectangles you can — driveways, flower beds, and the house footprint should be left out. Enter the length and width of each section in feet. Leave unused sections at zero. The calculator multiplies length by width for each piece and sums them.

The Formula Explained

The area of a rectangle is length times width. The total lawn area is simply the sum of all sections:

$$\text{A} = (\text{L}_1 \times \text{W}_1) + (\text{L}_2 \times \text{W}_2) + (\text{L}_3 \times \text{W}_3)$$

To convert square feet to square yards, divide by 9 (since 1 yard = 3 feet, \(1\,\text{yd}^2 = 9\,\text{ft}^2\)). To convert to acres, divide by \(43{,}560\,\text{ft}^2\). For square meters, multiply by \(0.09290304\).

A lawn divided into rectangular sections; total area is the sum of each section's length times width.

Worked Example

Suppose the front yard is 40 ft × 25 ft and the back yard is 50 ft × 30 ft. Front = 1,000 ft², back = 1,500 ft², total = 2,500 ft². That's about 277.78 yd², roughly 232.26 m², or 0.0574 acres.

$$\text{Front} = 40 \times 25 = 1{,}000\,\text{ft}^2$$

$$\text{Back} = 50 \times 30 = 1{,}500\,\text{ft}^2$$

$$\text{Total} = 1{,}000 + 1{,}500 = 2{,}500\,\text{ft}^2$$

Worked example: add the area of each rectangle to get the total lawn square footage.

FAQ

How accurate does this need to be? For seed and fertilizer, round up slightly — it's better to have a little extra than to come up short mid-job.

What if my lawn is curved or L-shaped? Split it into rectangles that approximate the shape and enter each one. The sum will be close enough for most landscaping purposes.

How much seed do I need? Check the product bag, but a common rate for new lawns is about 4–5 lbs of seed per 1,000 ft².