Board Feet Calculator
Calculate board feet for lumber pricing and project planning with waste factor
About this calculator
A Board Feet Calculator helps woodworkers, contractors, and lumber buyers accurately determine the volume of lumber needed for projects. Board feet is the standard measurement for pricing lumber, calculated by multiplying length × width × thickness in feet. This calculator includes a waste factor feature to account for cuts, mistakes, and unusable pieces, ensuring you purchase sufficient materials while minimizing costly return trips to the lumber yard.
How to use
Enter the lumber dimensions (length, width, thickness) in feet or inches, then input the quantity of boards needed. Add a waste factor percentage (typically 10-20%) to account for cuts and mistakes. The calculator will display the total board feet required and help estimate lumber costs for accurate project budgeting.
Frequently asked questions
What is a board foot?
A board foot equals 144 cubic inches of lumber, typically a piece 1 inch thick, 12 inches wide, and 12 inches long.
What waste factor should I use?
Most projects require 10-15% waste factor for experienced woodworkers, while beginners should consider 15-20% for cuts and mistakes.
Can I mix different lumber sizes?
Calculate each lumber size separately, then add the total board feet together for your complete material list and pricing estimate.