Linear Feet to Square Feet Calculator

Convert linear feet of boards, trim or roll goods into square feet using the material's width.

ft
Board face width, roll width, etc.

Square feet

45.8 ft²

  • Square yards5.09 yd²
  • Linear feet per ft²2.18

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

How to use it

  1. Enter the linear feet.
  2. Enter the material width (the actual face width, not the nominal size).

The formula

Square feet = linear feet × width (ft)

Worked example

Linear feet100 ft
Width of the material5.5 in

Result

Square feet45.8 ft²
Square yards5.09 yd²
Linear feet per ft²2.18

Tips before you order

  • A nominal 1×6 board is actually 5.5 in wide; a 1×4 is 3.5 in.

Questions

How many linear feet of 1×6 in a square foot?

About 2.18 linear feet (12 ÷ 5.5).