Rectangle Area and Perimeter Calculator
Enter the length and width — get the area, perimeter and diagonal (by Pythagoras) all at once. Perfect for land, room or plot calculations.
Enter values — the result will show live here.
How to use
- Enter the length and width in the same unit (feet, meter etc).
- The area, perimeter and diagonal will all show in the result.
Note: Formulas: Area = length x width, Perimeter = 2(length + width), Diagonal = √(length² + width²). The result will be in the same unit you entered.