Hi mpamr,
A Linear Foot is just a measurement of length and does not take into
account its width or thickness.
A Board Foot is a measurement of volume, the standard being 12" x 12"
x 1" is one board foot.
Square Feet measures area, simply width x length.
It is not possible to convert linear footage into square footage
because a linear foot is only one dimension and a square foot is two
dimensions, and additionally, a "board foot" is an example of three
dimensions. However, if you know the linear footage as well as the
width, you can divide the width by 12 and multiply by the linear
footage - that should give you the square footage of a particular
bundle of flooring.
GLOSSARY:
"BOARD FOOT - A unit of measurement of lumber represented by a board 1
foot long, 12 inches wide, and 1 inch thick or its cubic equivalent.
In practice, the board foot calculation for lumber 1 inch or more in
thickness is based on its nominal thickness and width and the actual
length. (Width x Thickness / 12 x Length)"
"SQUARE FOOTAGE ? A unit of measurement to determine that total
amount of
flooring required for a given area. In practice, calculate by
multiplying the length times the width of the space. For the purpose
of determining the amount of square footage per width in a given
flooring bundle, calculate by dividing the width of the flooring by 12
and then multiplying be the total linear footage (length of layers x
number of layers)."
http://vintagelumber.net-links.com/PDFs/glossary.pdf
CALCULATORS:
Hardwood Lumber Board Footage Calculator:
http://www.woodweb.com/cgi-bin/calculators/calc.pl?calculator=hardwood_bd_ft
Softwood Lumber Board Footage Calculator:
http://www.woodweb.com/cgi-bin/calculators/calc.pl?calculator=softwood_bd_ft
Tile Square Foot Calculator:
http://www.classicceramictile.com/default.asp?LINKNAME=SQFOOTCALC
FORMULAS:
"Square foot vs board foot:
"A board foot is equal in volume to a square foot of lumber 1" thick."
"In one-inch thick lumber or less, the board feet and square feet are
the same. We call this surface measure, not square foot measure. Any
thickness over one inch must multiply surface measure by the thickness
for your board foot measure. But flooring, siding and paneling is
usually sold by the square foot, no matter what the thickness. Some
mills also sell this by the board foot... Moulding is usually sold by
the linear foot or running foot"
http://www.woodweb.com/knowledge_base/Square_foot_vs_board_foot.html
TO FIGURE BOARD FOOTAGE (AVERAGE ONLY)
BOARD FOOTAGE = {length in feet) * (width in inches) * (thickness in
inches) / 12
SQUARE FOOTAGE COVERAGE
This formula will give you the amount of material less waste you will
actually need to cover an area. For this, you first need to know the
face size in inches. If it is multiple size faces, like in multiple
width flooring, add al the widths together.
LINEAR FOOTAGE NEEDED = {square footage in feet) * 12} / aggregate
face size in inches
Example :-
* Square footage in feet = 100 sq. ft.
* Aggregate faces in inches = 6" faces
LINEAR FOOTAGE NEEDED = {100 sq. ft.) * (12) / 6" faces = 200 Linear
Feet Needed.
http://www.rexlumber.com/lumberformulas.htm
Additional Link:
Dr. Math:
http://mathforum.org/library/drmath/view/56468.html
I hope this helps. If you have any questions, please post a
clarification request before rating my answer.
Thank you,
hummer
Search Terms Used:
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