Rectangle Perimeter and Area Calculator
Enter the length and width of a rectangle to calculate its area and perimeter.
Rectangle Perimeter and Area Calculator
Calculate the area and perimeter of a rectangle from its length and width.
This calculator provides an estimate for general informational purposes only. It is not a substitute for professional financial, mechanical or engineering advice.
A rectangle's area is its length times its width, and its perimeter is twice the sum of length and width — two of the most commonly needed measurements in everyday and construction math.
Example
- With the default values shown above, this calculator returns: Area ≈ 60.00; Perimeter ≈ 32.00.
Frequently Asked Questions
What are the formulas?
Area = Length × Width. Perimeter = 2 × (Length + Width).
What if it's a square?
A square is just a rectangle with equal length and width — enter the same value for both.