I want to create a raised flower bed. Is there a way to figure out
how much dirt I will need?
I want the flower bed to be relatively circular, about six feet
in diameter, and about six inches deep.
Is there some way to get this dirt without buying a bunch of bags
of dirt? In other words, if I go to a nursery or somewhere else,
is there someone who will deliver the amount of dirt I want?
Thanks in advance.
On Thu, 07 Apr 2005 23:44:48 +0000, Suzie-Q wrote:
A yard will cover 108 square feet at 3" deep. A cubic yard is 27 cubic
feet. If you were buying bags of dirt and the bags were 2 cubic feet, then
you would need 14 bags.
Most soil suppliers will deliver for a fee and sell in cubic yards. With
all things in life though, they won't bring you a cubic yard though, it
will be under a bit over over a bit. They just dump it in the truck and go.
You can borrow/rent a full size truck and it will carry a yard.
Good luck to you.
Feet times feet times inches equals cubic yards? Ummm. No.
Yards times yards times yards equals cubic yards (when you're dealing with
square corners). More accurately, square yards times height in yards equals
cubic yards. Or square feet times height in feet divided by 27 equals cubic
One key to computing area or volume is to have each measurement in the same
unit. All feet. All yards. All inches. And then what you get is that unit
squared (for area) or cubed (for volume). Mixing unit times gives you a
worthless result. A number no better than a random number.
Also, the original poster had a circular bed. The area of a circle is not
length times width. It's Pi times square radius. Multiply that by the height
in the same unit as the radius to get volume. Again, the measurements must
be in the same unit. If the radius is measured in feet, then the height must
be in feet, too.
If we were dealing with a triangular area, expand it so that it's a 4-sided
area, with one edge going from corner to corner. Now use the same formula as
for a 4-sided area, but divide by two.
To convert from cubic feet to cubic yards, you need to remember that a cubic
yard is 3-feet by 3-feet by 3-feet. Or put another way, three layers of
3-feet by 3-feet, or 3 layers of 9 cubes, thus 27 cubic feet in a cubic
But whatever formula is used, each measurement must be in the same unit. All
feet. All yards. Or all inches. No mixing.
I formatted that incorrectly.
_L'xW'xD"_= cubic yard/s
The formula I gave was not as an answer to the OP but just as a general
How much mulch or soil is needed?
To determine how much mulch is needed for a specific area, measure the
area to be covered and use the following formula:
Area to cover (in square feet) x depth of mulch or soil desired (in
inches) x 0.0031 = cubic yards of mulch or soil required
-- or use this alternate method -- Area to cover (in square feet) x
depth of mulch or soil (in inches) / 324 = cubic yards of mulch or soil
For example, to cover an area of 100 square feet with 3 inches of mulch:
100 square feet x 3 inches deep x 0.0031 = 0.93 cubic yards needed
Note: If buying mulch in 1 cubic foot bags, multiply the cubic yards
needed by 27 (there are 27 cubic feet in 1 cubic yard) to find the
number of bags needed.
Travis in Shoreline (just North of Seattle) Washington
USDA Zone 8b
The formula to determine the volume of a cylinder is:
Pi * (Radius squared) * height = 3.14 * (3 * 3) * .5 = 14.14 cubic
That's a little more then half a cubic yard. Don't know that they
sell half yards, but I've never tried. If that's all I needed, I'd
probably just buy 5 3 cubic foot bags, but if you can pick it up
yourself it may be cheaper to buy by the yard. I'm sure you can
probably put the rest to use somewhere. The soil will also compact
and settle somewhat, especially after the first heavy rain, so you may
need a little more then the original estimate.
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