Calculating dirt needed using sq footage and required depth?

Discussion in 'Landscape Architecture and Design' started by Green Pastures, Apr 11, 2007.

  1. Green Pastures

    Green Pastures LawnSite Silver Member
    Messages: 2,456

    There used to be a sticky with a link to a free site that would allow you to calculate the dirt (mulch, stone, whatever) needed (in cubic yards and ot tonnage) to fill a space using the known square footage and depth you wanted to fill.

    I can't find it on this site.

    I did several searches so don't be a smartalec please.

  2. scholzee

    scholzee LawnSite Member
    from NY
    Messages: 130


    1 Cubic yard 1 inch deep will cover 324 Square feet
    1 Cubic yard 2 inch deep will cover 162 Square feet
    1 Cubic yard 3 inch deep will cover 108 Square feet
    1 Cubic yard 4 inch deep will cover 81 Square feet
    1 Cubic yard 5 inch deep will cover 64 Square feet
    1 Cubic yard 6 inch deep will cover 54 Square feet

    (Length in Feet)( Width in Feet)*(Depth in Feet)=cubic feet
    Example: Say you have an area that is 12' x 18 '. You want to cover it with 6" of material.
    Multiply, 12' x 18' x *.5' to get 108 cubic feet. You see, 6" is .5 feet or 1/2 a foot.
    Now, devide 108 cubic feet by 27 cubic feet(1 yard) to get your total yardage at 4 yards.

    If you want a 3" cover you use 1/4' or .25'. A four inch cover is 1/3 foot or .33', etc.
  3. PatriotLandscape

    PatriotLandscape LawnSite Bronze Member
    from MA
    Messages: 1,209

    length (feet) x width (feet) x depth (feet) / 27 = yardage x 1.2 for compaction
  4. OP
    Green Pastures

    Green Pastures LawnSite Silver Member
    Messages: 2,456

    Thanks....found the "free tools" tab at the top of the page.....;)
  5. RICKT761

    RICKT761 LawnSite Member
    Messages: 5

    I have been in this business for twenty-six years and have always used the following formula with good results.
    Multiply your square footage by .003 for 1" coverage
    .0061 for a 2" coverage .0092 for a 3" coverage and
    .0123 for a 4" coverage. It takes 12.3 cubic yards of top soil to cover 1,000 square feet at 4". Hope this helps.
  6. GreenN'Clean

    GreenN'Clean LawnSite Bronze Member
    Messages: 1,510

    areamulchandsoil dot com is what i use

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