Lumber Calculator

Calculate board feet and total lumber needed for your woodworking or construction project. This tool processes all data locally in your browser. No information is ever sent to any server. Completely free, no registration required.

How to Use the Lumber Calculator

1. Enter your input values above
2. Results update automatically
3. Copy or download the output

What is a Lumber Calculator?

A Lumber Calculator estimates the number of boards, studs, joists, and sheet goods needed for framing, decking, and sheathing projects. It converts between linear feet, board feet, and piece counts, and calculates total material cost. Whether building a deck, framing a wall, or ordering wood for a woodworking project, this calculator ensures you order the right amount of lumber.

How Does It Work?

Enter project type (wall framing, deck, fence, or custom), dimensions, and material specifications (2×4, 2×6, 5/4 decking, plywood sheets). The calculator determines: stud count (16\

Formula

Board Feet = (Thickness\

Who Uses This Tool?

• Home builders estimating lumber for framing, decking, and fencing
• DIYers planning deck and fence projects
• Woodworkers calculating board feet for furniture projects
• Contractors pricing materials for bids and client quotes

Pro Tips

• Stud spacing: 16\
• OC may be allowed for non-load-bearing or with advanced framing
• Board feet is a volume measurement (1 BF = 144 cubic inches). Don't confuse with linear feet — a 2×4×8 is 5.33 BF but 8 linear feet
• Lumber is sold in nominal dimensions: a 2×4 is actually 1½\
• . Factor this into your actual dimensions

Free online Lumber Calculator — no signup, 100% client-side processing. All data stays in your browser.