Unit Converter

Square Feet to Linear Feet Calculator

Convert area (square feet) to length (linear feet) based on your material width. Essential for ordering flooring, decking, fencing, siding, and trim.

The Short Answer: Linear feet = Square feet ÷ Material width (in feet). A 200 sq ft room with 6-inch-wide boards needs 400 linear feet of material. Always add 10% for waste from cuts.

Sq Ft to Linear Ft Converter

Enter your area and material width.

Linear feet needed
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Board/piece count
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Area confirmed
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Add 10% to linear feet for waste from cuts and fitting. Diagonal layouts may require 15–20% extra.

Simple formula: area ÷ width
Works for any material width

How to Convert Square Feet to Linear Feet

Square feet measures area. Linear feet measures length. To convert between them, you need one more piece of information: the width of the material you're using. The formula is straightforward:

This conversion comes up constantly in building projects. Flooring is sold by the square foot but cut from boards measured in linear feet. Fencing is measured by the linear foot but covers an area. Siding, trim, decking — all linear materials that cover square footage.

Common Material Widths

Why This Conversion Matters

Getting the conversion wrong means buying too much or too little material. A 300 sq ft room with 3¼-inch hardwood flooring needs about 1,108 linear feet of boards. With 8-foot boards, that's 139 boards. Guess wrong by even 10% and you're either making a return trip or stacking leftover boxes in the garage. This calculator eliminates the guesswork.

Frequently Asked Questions

Divide the total square footage by the width of your material in feet. For example, 150 sq ft of 6-inch-wide boards: 150 ÷ 0.5 = 300 linear feet. The calculator above handles the unit conversion automatically — enter width in inches and it converts for you.

Yes. Linear feet and running feet are the same measurement — they both mean the total length of material in a straight line, regardless of width or thickness. Lumber yards and flooring stores use both terms interchangeably.

Add 10% for standard straight layouts. For diagonal or herringbone patterns, add 15–20%. Rooms with many cuts around obstacles (cabinets, closets, angles) may need closer to 15%. It's always better to have a few extra pieces than to run short — matching dye lots and production runs on a reorder isn't guaranteed.

It depends entirely on the material width. One square foot of 12-inch-wide material is 1 linear foot. One square foot of 6-inch-wide material is 2 linear feet. One square foot of 3-inch-wide material is 4 linear feet. The narrower the material, the more linear feet you need per square foot.

The Bottom Line

Square feet to linear feet is one of those conversions you'll use on almost every building project. The formula is simple — area divided by width — but doing it in your head with fractional inch widths is where mistakes happen. Use this converter, add your waste factor, and you'll know exactly how many boards or pieces to buy before you leave for the store.

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