Linear footage is a measurement used in construction to determine length for purchasing construction materials. You can calculate the linear footage of a room by measuring the length of each wall and adding the sums of the length measurements. Many construction products, including floor boards, moldings and trim, are sold by linear feet.

## Step 1

Measure the length of a wall in a room. For example, assume a wall measures 8 feet.

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## Step 2

Measure the length of the opposite wall in the same room. For example, assume the opposite wall also measures 8 feet.

## Step 3

Measure the remaining walls in the room. For example, assume the two remaining walls both measure 12 feet.

## Step 4

Add the length measurement of all of the room's walls. Continuing the same example, 8 + 8 + 12 + 12 = 40 linear feet. This figure represents the linear footage of the room.