### Quick Answer

**Linear feet is calculated by adding the lengths of points connected by straight lines.** For example, the perimeter around a house can be measured in linear feet. Square feet measures area, and linear feet measures length.

### Full Answer

Two areas that measure the same square feet can have different perimeters, hence differing values for linear feet, if they’re shaped differently. For example, a rectangle that measures 8 feet long and 2 feet wide has an area of 16 square feet (length x width) and a perimeter of 20 linear feet (2 x (length + width), while a square that measures 4 feet by 4 feet has the same area but a perimeter of 16 linear feet.