BF CALC

Board Foot Calculator

Calculate board feet instantly using thickness, width, and length. Perfect for hardwood lumber, tabletops, shelves, and custom woodworking projects.

Board Foot FAQ

Board feet are the industry standard for measuring lumber volume. Knowing your total board footage helps you price materials accurately, reduce waste, and compare lumber costs across species like walnut, white oak, maple, cherry, ash, and mahogany.

Whether you’re planning a small DIY build or a large custom wood project, accurate board-foot calculations are essential before ordering material.

What is a board foot?

A board foot is a unit of measurement used in the lumber industry. One board foot equals 144 cubic inches of wood (12″ × 12″ × 1″).
How do you calculate board feet?

Board Feet = (Thickness × Width × Length) ÷ 144

All measurements are in inches.
Why is board footage important when buying lumber?

Most hardwood lumber is sold by the board foot. Knowing your board footage allows you to:

  • Estimate material cost accurately
  • Compare pricing between wood species
  • Avoid ordering too little or too much lumber
Can I calculate multiple boards at once?

Yes. This calculator allows you to add multiple boards and automatically totals the combined board footage for your project.
Does this work for rough lumber and surfaced lumber?

Yes. You can calculate board footage for:

  • Rough-sawn lumber
  • S2S, S3S, or S4S boards
  • Finished hardwood components

Just enter the actual board dimensions.
What thickness should I enter for hardwood lumber?

Enter the actual thickness in inches, not nominal sizes. For example:

  • 4/4 lumber ≈ 1″ rough
  • 5/4 lumber ≈ 1.25″ rough
  • Finished boards are often thinner after milling
Can I estimate lumber cost with this calculator?

Yes. If you enter a price per board foot ($/BF), the calculator will estimate material cost based on your total board footage.
Is this calculator accurate for tabletops and shelving projects?

Absolutely. This calculator is commonly used for:

  • Solid wood tabletops
  • Floating shelves
  • Countertops and desktops
  • Furniture components
Does this replace professional material planning?

This calculator provides accurate volume estimates, but professional projects may still require extra allowance for grain selection, defects, milling loss, and waste.