Board Feet Chart and Calculator

Board feet is used as a volume measurement of lumber. Calculate board feet using lumber dimensions and optional pricing information.

Board Feet Calculator

Board feet is a volume measurement for lumber. One board foot equals one square foot that is one inch thick.

Formula: BF = (t × w × L) / 12

Where:

  • t = nominal lumber thickness (inches)
  • w = nominal lumber width (inches)
  • L = nominal lumber length (feet)

Default example: 2" × 4" × 6' = 4 board feet

Calculator

Inputs

Results

Board Feet-- bf
Total Cost-- $
DimensionQuick ApproximationFormula
1 × 4Divide length by 3Length × 1/3
1 × 6Divide length by 2Length × 1/2
1 × 8Multiply length by 0.66Length × 2/3
1 × 12Linear length = board feetLength × 1
2 × 4Multiply length by 0.66Length × 2/3
2 × 6Linear length = board feetLength × 1
2 × 8Multiply length by 1.33Length × 4/3
2 × 12Multiply length by 2Length × 2