Perimeter Calculator
Rectangle perimeter.
P = 2(L + W).
How the Math Works
The perimeter of a rectangle is calculated by adding up the lengths of all four sides. Since opposite sides of a rectangle are equal, this simplifies to multiplying the sum of one length and one width by 2, or equivalently, adding twice the length to twice the width. The formula is P = 2l + 2w, where P is the perimeter, l is the length, and w is the width.
Practical Applications
To use this calculator, simply enter the length and width of your rectangle into the designated fields. The calculator will automatically apply the perimeter formula and display the total distance around the rectangle. This is useful for determining how much materials you need to enclose a rectangular area, such as fencing for a garden or trim for a room.
Day-to-Day Use
Knowing the perimeter of rectangular spaces helps in everyday tasks like buying the right amount of wallpaper border, carpeting baseboards, or fencing for your backyard. It's also helpful when planning layouts for furniture or appliances where you need to know how much space something will take up around the edges of a room.
FAQ
Other shapes?
Use the shape-specific calculators.