How to Measure Your Lawn’s Square Footage

When you start planning a project that involves landscaping rock, a common question that we ge t asked is, how much landscaping rock do I need?

Calculating this accurately can save you a bunch of money and headaches.

You don’t want to order too much as you will waste money and all that extra labor spreading it around. If you order too little, you won’t have enough to cover the landscape adequately.

There aretwo main factors you need to consider when calculating how much landscaping rock you need for your project:

  • The size of the project area you will be covering
  • How deep you want the rock to be

Tools you will need:

  • Measuring Tape
  • Calculator


Use rock as mulch only in beds for plants that require minimal moisture like alpine plants and cacti.

Install barriers around rock areas that are next to yards. This will keep the rock in its area and keep it from spilling over onto your lawn, where it could cause extensive damage to your lawnmower. 


Determining the Size of Area

Step 1: Inspect the Area

The first piece of information you need to know is the shape and dimensions of your lawn, particularly the width and length. You will want to measure and multiply the area length times the width in feet until the square footage is 1,000 sq. ft. and mark off this area with the help of a marking tool like washable paint or objects to distinguish the treatment areas border line. 

Step 2: Convert Measurements

If your yard is rectangular or square, measure the length and width then multiply together (length X width = square footage). For example, if your yard has a length of 10 feet and width of 8 feet, you would multiply 10 by 8 to get 80 square feet.

Be aware for triangle shaped lawns, you will measure the length and width, multiply together, then divide by two ( length X width / 2 = square footage).

If your lawn is a not a perfect rectangle, break the lawn into different sections to measure more easily, then add measurements together to get the area’s total square footage.

For treatment areas with flowerbeds and other obstructions in the yard you will measure the square footage of the object and subtract from your yards total square footage.

Example, you have a property that is 12,000 sq. ft. and in the middle you have a landscape bed with a length of 3 feet and width of 2 feet. You will multiply 3 by 2 to get 6 feet, then subtract from your yard total.

  • 3 ft. X 2 ft. = 6 sq. ft. 
  • 12,000 sq. ft. – 6 sq. ft. = 11,994 sq. ft. 

Therefore, you will treat an area with 11,994 sq. ft. 

Save Your Information

Save and edit your addresses: keep emails, phone numbers, names, and notes. Whether you are a homeowner or a contractor, it’s super useful to have your area measurements at hand.

FREE Lot Size Calculator

You can use our lawn/lot size calculator as many time as you like. No fees, no hussle. Keep your information on file. Global Syn-Turf offers services free of charge. Create your account today and save it all in one place: it’s free, no obligations, no questions asked.


The area of a circle is the radius squared (r2) multiplied by π = 3.14. The radius is equal to one-half the diameter of the circle.

Area = π r2

Area = (3.14)r2

Example 2:

Calculate the area of a circle with a radius of 30 ft.

Area = (3.14)r2

Area = (3.14)(30 ft)2 remember, square the radius first then multiply by 3.14

Area = 2,826 ft²

Reader Interactions


  1. CooperCooper says

    I never would have thought to use Google Maps to measure my lawn!! This is SUCH a helpful tip! Now I don’t have to go out and buy one of those measuring wheels!! Thank you so much!!!



The area of a triangle is one-half the base (b) multiplied by the height (h).

Area = [(b)(h)] / 2

Example 4:

Calculate the area of a triangle where the base is 60 ft and the height is 30 ft.

Area = [(b)(h)] / 2

Area = [(60ft)(30ft)] / 2

Area = 900 ft²

How to Find Your Property’s Square Footage with Online Tools

Mobile applications for your smartphone or other devices make measuring easier and more accurate for you.

Here are some lawn measuring apps:

  • Global Syn-Turf
    • Enter your address, and then use the Pen tool to mark your grass areas
  • Google Earth
    • Enter your address, and use the ‘Measure distance and area’ tool to mark the grassy areas of your lawn
  • Measure My Lawn
    • Use the measurement tools provided to mark the lawn areas of your yard
  • Planimeter.
    • Download this mobile app for $2.99 to measure the square footage of your yard

Put Your Info to Use!

Once you have all of your measurements, it’s time to go to your favorite store to purchase grass seed and fertilizer. Do you have crabgrass or weedy lawn issues? Give GreenView Fairway Formula Spring Fertilizer with Crabgrass Preventer a try. It prevents crabgrass and other grass and broadleaf weeds (as listed on label) for up to 4 months when applied prior to germination in lawns. It also provides post-emergence control of seedling crabgrass for up to 4 weeks after it germinates. Expect professional-looking results from our favored pro-grade GreenView Fairway Formula lawn care line.


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