Perimeter of a Rectangle Calculator

Example Calculation

For a rectangle with a length of 14 feet and a width of 6 feet:

$$P = 2 \times (L + W) = 2 \times (14 + 6) = 2 \times 20 = 40 \, \text{feet}$$

Another example: For a rectangle with an area of 35 square feet and a length of 7 feet, find the width and then the perimeter:

$$\text{Area} = L \times W \Rightarrow W = \frac{\text{Area}}{L} = \frac{35}{7} = 5 \, \text{feet}$$ $$P = 2 \times (7 + 5) = 2 \times 12 = 24 \, \text{feet}$$