Construction Formulas

Construction Formulas
Linear Feet is probably the simplest quantity to calculate.
Lumber yards sometimes sell lumber by the linear foot which
makes it easy to calculate the cost per piece.
Linear feet = number of items X the item length

Board Feet
adds two other dimensions to calculating the cost of
materials. Lumber suppliers sometimes sell their lumber per
thousand board feet. A board foot is one linear foot of lumber -
one foot wide - one inch thick. A 1x12 piece of pine which is 12
feet long will equal 12 board/feet. In the same way a 2x6 piece of
pine 12 feet long will equal 12 board/feet.
Board feet = Linear feet X ((thickness inches X width
inches) / 12 inches)

Square Feet
is a simple process of multiplying the length X the
width. You will need to know how many square feet there is in the
foundation in order to estimate how much vapor barrier to buy
and to determine how much the termite pre-treat will cost.
Square Feet = Length X Width

Cubic Feet
adds one other dimension to square feet. This
dimension is
depth.
Items that require you to know how the amount of cubic feet are fill
dirt and concrete. Concrete and fill dirt are both sold by the cubic
yard. There is 27 cubic feet in a cubic yard of fill dirt and concrete.
Cubic Feet = Length X Width X depth

Cubic Yard
is used to determine how yards of concrete or fill dirt
might be needed for the job. There is 27 cubic feet in a cubic yard
of fill dirt and concrete.
Cubic Yard = Total Cubic Feet / 27 cubic feet
 
Construction Formulas
Category Construction Glossary