Help needed for soil calculation

Discussion in 'Starting a Lawn Care Business' started by RapidRide2, Apr 4, 2007.

  1. RapidRide2

    RapidRide2 LawnSite Member
    Posts: 6

    I 'm a Newbie,,, I need to fill in where an above ground swimming pool once was and then seed. I am pretty sure a dirt hauling place could calculate this for me , however I would like to learn for myself.

    The old swimming pool hole is 21' diameter and 8'' deep. Can someone give me the formula on how much dirt i will need. If possible show me how it's calculated so i can use the formula for future references???? Thanks in advance.
     
  2. chris638

    chris638 LawnSite Member
    Posts: 149

    Come on, that's a high school math question, not a landscape question. Pie x R squared x Depth. That will give you cubic ft. and divide by 27 to get cu. yds.
     
  3. RapidRide2

    RapidRide2 LawnSite Member
    Posts: 6

    Thanks,, I knew piex3.14 however i didn't know to divide by 27 to get cu. yds. That's why i put it in the starting a landscaping and lawn section. I guess that's what i get for wanting to learn something.
     
  4. FATWEASEL

    FATWEASEL LawnSite Senior Member
    from NC
    Posts: 326

    Pie means nothing unless its cherry or pecan or..um..well...okay, we won't go there, but anyway....pi IS 3.14. 'r' is radius, half the distance across the circle or in your case 10.5 feet. Approximately 22 cubic feet is needed. I'm sure you'll use every bit of a full yard (27 cubic feet) to account for settling.

    Andy:)
     
  5. chris638

    chris638 LawnSite Member
    Posts: 149

    One yard wouldn't even touch it. Try 8.5 yds. 3.14 x 10.5 x 10.5 = 346 x 2/3. = approx. 230 divided by 27 = 8.5 cubic yds.
     
  6. FATWEASEL

    FATWEASEL LawnSite Senior Member
    from NC
    Posts: 326

    DOH!!!:rolleyes: 'r' squared :hammerhead: Eh, what do ya want at 4am?:laugh:
     
  7. Runner

    Runner LawnSite Fanatic
    Posts: 13,494

    Don't forget to allow for settling, either. Not trying to be a smart alek, but the measure will be taken with raw soil, that is fluffed. You can allow about 25% for settling.
     
  8. lawnpro724

    lawnpro724 LawnSite Silver Member
    Posts: 2,201

    Do you mean 8' instead of 8" deep? If its 8' and 21' around you will need 130yds of topsoil to fill it in. In case you don't know how much that is its 170ton.
     
  9. paul vroom

    paul vroom LawnSite Senior Member
    Posts: 260

    Go to the top off this page, there is a "free tool" tab. Go to the mulch and soil calculator. It works awesome.
     
  10. chris638

    chris638 LawnSite Member
    Posts: 149

    I haven't seen too many 8' deep above ground pools?????????????????
     

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