Board Foot Calculator — Calculate Lumber Volume

Board Foot Calculator

Calculate board feet for your woodworking projects with our comprehensive calculator. Determine lumber volume needs based on dimensions, wood type, and waste factor for accurate material planning.

Step 1: Board Dimensions

Understanding Board Feet

One board foot equals 144 cubic inches of wood (1″ thick × 12″ wide × 12″ long). The formula is: (Thickness × Width × Length) ÷ 12 × Quantity = Total Board Feet.

Step 2: Calculation Parameters

10%

About Waste Factor

The waste factor accounts for cutting losses, defects, and material that can’t be used. For most projects, 10-15% waste is typical. Higher quality wood or complex projects may require 20% or more.

Board Foot Calculation Results

Summary
Wood Comparison
Breakdown

Total Board Feet Needed

4.0 BF
1″ × 6″ × 8′ board with 10% waste
Board Dimensions
1″ × 6″ × 8′
Board Feet (Net)
4.0 BF
Board Feet (with Waste)
4.4 BF
Estimated Cost
$36.30

Wood Type Cost Comparison

Wood Type Price/Board Foot Cost for This Project Board Feet Needed

Board Foot Calculation Breakdown

Board Foot Formula

Board Feet = (Thickness (in) × Width (in) × Length (ft)) ÷ 12 × Quantity

To calculate board feet: Multiply thickness (inches) by width (inches) by length (feet), divide by 12, then multiply by the number of boards. Add waste factor by increasing total by the waste percentage.

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