Board Foot Calculator

Calculate board feet for hardwood and rough lumber, which is sold by the board foot rather than by the piece.

Use nominal thickness for rough lumber (e.g. 2 in for 8/4).
$

Board feet

80

  • Per piece8 bd ft
  • Cubic feet6.67 ft³

Estimates only. Round up when you order, and confirm structural details with your local building code.

How to use it

  1. Enter thickness and width in inches and length in feet.
  2. Enter the number of pieces.
  3. Optionally add the price per board foot.

The formula

Board feet = thickness (in) × width (in) × length (ft) ÷ 12

Worked example

Thickness2 in
Width6 in
Length8 ft
Number of pieces10
Price per board foot (optional)0 $

Result

Board feet80
Per piece8 bd ft
Cubic feet6.67 ft³

Tips before you order

  • Rough lumber thickness is given in quarters: 4/4 = 1 in, 8/4 = 2 in.
  • One board foot = 144 in³ (12 × 12 × 1 in).

Questions

How many board feet in a 2×4×8?

5.33 board feet using nominal dimensions.