Calculating S.F.

Discussion in 'Turf Renovation' started by aperfectlawn, Mar 23, 2004.

  1. aperfectlawn

    aperfectlawn LawnSite Member
    Posts: 175

    What is the best way to calculate square tootage it it is a irregular or multi-curved area? I understand (lenght x width), just not sure about curves.
     
  2. aperfectlawn

    aperfectlawn LawnSite Member
    Posts: 175

    What is the best way to calculate square footage if it is a irregular or multi-curved area? I understand (lenght x width), just not sure about curves. Not a typeist.
     
  3. D Felix

    D Felix LawnSite Bronze Member
    Posts: 1,898

    I generally try to figure what the average length and width is. Break the area into sections if you have to. Add a little as 'fudge' factor too.


    Dan
     
  4. Critical Care

    Critical Care LawnSite Bronze Member
    Posts: 1,654

    Like Dan said, you may want to break the area down into sections. Length*width is for a rectangle, parallelogram, or square, but from that you can easily figure a triangle. A triangle is just half. Picture a business card with a line drawn from the top left corner down to the bottom right, that divides the rectangle into two triangles. And a circle is pi*r(2), but if you see a “D” shaped area you could get close by figuring it as one half of pi*r(2). And some things you can average out, like when you see an “S” shape edge. If you drew a line right down those curves it would look like “$” with equal areas to the left and right.

    When I have to calculate areas such as for an irrigation plan, I take several key measurements and with an engineers rule I draw an outline of the area to scale onto graph paper. One inch may equal ten, twenty feet, or whatever. Or, one square may equal that. If your drawing is fairly accurate, you can have the whole area scaled down into lots of little 100 or 400 s.f. squares which you can add up for your total.
     
  5. DJL

    DJL LawnSite Member
    Posts: 237

    You could try this:

    Take a walking meter and run it along the curves. Multiply that times an average width. I find it works pretty well. I can get within 1/2 yard. Of course you want to make sure you aren't short 1/2 yard.
     
  6. KenH

    KenH LawnSite Bronze Member
    from CT
    Posts: 1,622

    There is a tool called a planimeter. Draw the area to scale, trace over it with the planimeter, do a calculation, and done. I use it to find sqaure footage of irregular shaped pools and patios. Got mine on Ebay for 30$.
     

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