Perimeter Calculator
Calculate the perimeter of a rectangle from its length and width.
Calculate
Enter your values below.
Result
Perimeter
0
Formula used
Perimeter = 2 × (Length + Width)
Example: 2 × (8 + 5) = 26 units.
How to use this calculator
- Enter Length, Width.
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
What is perimeter?
The total distance around the outside edge of a shape.
Is this only for rectangles?
Yes — for a general polygon, use the Polygon Calculator.
Can I use this for a square?
Yes, set length equal to width.
What units does the result use?
The same linear unit you entered — no squaring is applied to perimeter.