Linear Feet Calculator
A linear feet calculator finds the total length of material you need, measured in a straight line regardless of width. For boards or planks, divide your area by the board width to get linear feet. For runs like trim or fencing, it is simply the total length. Enter your figures below to get the linear feet.
linear feet = area (sq ft) / (board_width_in / 12); also supports direct run length.
- Area
- 0 sq ft
- Board width
- 0 in
Enter the area and board width to get linear feet.
Estimate only. Densities, yields and prices vary by supplier, moisture and region; confirm before ordering.
How Do You Calculate Linear Feet?
Linear feet is just length measured in a straight line, with width ignored. For trim, fencing or molding, add up the run lengths. For boards covering an area, divide the square footage by the board width in feet: 120 square feet of flooring with 0.5 foot wide boards needs 240 linear feet. The calculator handles both the area-to-linear conversion and simple run totals.
What Is the Difference Between Linear Feet and Square Feet?
Linear feet measures length only, while square feet measures area (length times width). A material sold by linear foot, like trim or lumber, is priced by how long it is, not how much surface it covers. When you need to cover an area with fixed-width boards, you convert square feet to linear feet using the board width. The calculator makes that conversion so you can order correctly.
Used by these material calculators
Related calculators
Frequently asked questions
- How do I calculate linear feet?
- For runs like trim or fencing, add the lengths. For boards covering an area, divide square footage by board width in feet. 120 sq ft with 6 inch boards is 240 linear feet.
- What is the difference between linear feet and square feet?
- Linear feet measures length only; square feet measures area. Materials like trim and lumber are sold by linear foot.