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