Free calculator
How big is your lawn?
Get the area right before you buy seed, fertilizer, or water. Measure the lawn, subtract the hardscape, and use the number everywhere else.
Lawn area
4,000sq ft
Square yards
444sq yd
Acres
0.092ac
Square meters
372m²
Gross area
4,000sq ft
How the area is calculated
Rectangle: length × width. Circle: π × radius². Triangle: ½ × base × height. Trapezoid: the average of the two parallel sides × the distance between them. The non-lawn deduction is subtracted from the gross area.
For an irregular lawn, split it into rectangles, circles, and triangles, calculate each one, and add the results. A phone measuring app can help with long distances, but check the result against a tape measure on at least one side.
Why the number matters
Almost every product rate is expressed per 1,000 sq ft. A lawn that is 20% larger than you think gets 20% more product than intended. That is both a cost problem and a label-compliance problem.
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