Length multiplied by width equals the square footage of a room. If the room is L-shaped, you can break the space down into several different squares or rectangles. You may want to measure in inches to figure out the total square inches. Then divide that by 144 to figure out the total square footage.

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For example, let's say you have an L-shaped room that measures 10 feet by 12 feet and another section that measures 6 feet by 8 feet.

First, convert the measurements to inches:
10 feet = 120 inches
12 feet = 144 inches
6 feet = 72 inches
8 feet = 96 inches

Next, calculate the area of each rectangle:
Rectangle 1: 120 inches x 144 inches = 17,280 square inches
Rectangle 2: 72 inches x 96 inches = 6,912 square inches

Add the areas of the two rectangles together:
17,280 square inches + 6,912 square inches = 24,192 square inches

Finally, divide the total square inches by 144 to get the total square footage:
24,192 square inches / 144 = 168 square feet

Therefore, the total square footage of the L-shaped room is 168 square feet.