Linear Feet to Square Feet Calculator
12 linear feet at 4 feet wide = 48 square feet — enter length and width below.
Metric conversion uses 1 square foot = 0.092903 square meters.
How the linear feet calculator works
A linear foot is a straight-line length — 12 inches measured along a board, a wall, or a roll of flooring. It tells you how long something is, but nothing about the area it covers.
Multiply that length by the width and you get the area in square feet. That single step is the core of flooring and material estimates, where products are priced and packaged by the area they cover.
sq ft = linear ft × width ft
Related tools
Once you know the area, the Price Per Square Foot Calculator turns it into a budget figure, while the Tile Calculator estimates how many tiles that area needs.
Linear feet to square feet FAQ
What's the difference between a linear foot and a square foot?
A linear foot measures straight-line length (12 inches in a line); a square foot measures area (a 12×12 inch square). Length × width converts one to the other.
Can you give a flooring example?
A room 12 linear feet long and 4 feet wide needs 48 square feet of flooring, before waste.
Do I need this calculation for fencing?
Fence runs are measured in linear feet; you need square feet only when buying materials priced by area (stain, sealant).
How many linear feet are in a square foot?
It depends on width: 1 square foot at 1 foot wide = 1 linear foot; at 6 inches wide = 2 linear feet.