Finding **the perimeter of a rectangle** is one of the easiest first steps towards becoming a geometry genius. The formula is simple and quick, and with a little practice, you’ll be finding the perimeter of every rectangle in sight!

So what is **the perimeter of a shape**, exactly? Picture a large, grassy field with a fence around the outside. The fence represents the perimeter – it’s just the outermost boundaries of the shape. When we calculate the perimeter, we’re looking for how long the distance around the shape is.

The formula used to **calculate the perimeter of a rectangle** is 2(l + w). L stands for length, which is found by measuring the longer side of the rectangle. W stands for width, which is found by measuring the shorter side of the rectangle. Let’s say the length of a rectangular field is 10 feet, and the width is 5 feet. To find** the perimeter of the rectangle**, we would add 5 and 10, which equals 15. To finish the equation, we would multiply 15 by 2 for a grand total of 30 feet. It’s really that simple, but if it still doesn’t make sense we would recommend speaking with an online math tutor.

Now that you know** how to calculate the perimeter of a rectangle**, practice on any rectangle you can find. Your computer screen, your kitchen table, and your windows are just a few that are right inside your house. You’ll be a perimeter master in no time! Ready for another challenge? Check out this guide to measuring the volume of a cylinder.