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Perimeter of a Rectangle
P = 2(l + b)
Where: P = Perimeter, b = breadth (width), l = length
Use the same units for all lengths (e.g. all in cm); areas come out in cm², volumes in cm³.
Solved example
Given: b = 7, l = 5
Find: P (Perimeter)
- Formula: P = 2·b + 2·l
- Substitute the values: P = 2·5 + 2·7
- Result: P = 24
Answer: P = 24
Calculator
How to calculate Perimeter of a Rectangle
- Write down the formula: P = 2(l + b).
- Note the known values (b, l).
- Substitute them and simplify to find P.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Perimeter of a Rectangle?
The formula is P = 2(l + b), where P = Perimeter, b = breadth (width), l = length.
What is Perimeter of a Rectangle when b = 7, l = 5?
P = 24. Substitute the values into P = 2(l + b) and simplify.