How to Calculate Board Feet
Board footage is calculated using the standard US lumber formula:
Board Foot Formulas:
1. Board Feet = (Thickness in Inches × Width in Inches × Length in Feet) ÷ 12
2. Total Board Feet = Single Piece Board Feet × Quantity of Pieces
Frequently Asked Questions
Why are nominal dimensions larger than actual lumber dimensions?
Nominal sizes (such as "2x4") refer to the green, rough-sawn lumber size before it is planed and kiln-dried. The actual dimensions of a finished modern 2x4 are 1-1/2" × 3-1/2". However, board foot volume and pricing are traditionally calculated using the nominal size.