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Rectangle Area calculator
Find the area, perimeter and diagonal of a rectangle.
Rectangle Area calculator
Enter your values below and press Calculate to see your result instantly.
Lateral Span (Width / Base)
Vertical Span (Length / Height)
Computed Absolute Area (A)
60.00 UnitsĀ²
GEOMETRIC PERIMETER
34.00 Units
DIAGONAL VECTOR (Hypotenuse)
13.00 Units
Calculations complete.
About the Rectangle Area calculator
Find the area, perimeter and diagonal of a rectangle.
How to use the Rectangle Area calculator
- Enter the Width / Base and the Length / Height.
- Press Calculate Rectangle Area.
Formula and method
Area A = w Ć l, perimeter P = 2(w + l) and diagonal d = ā(wĀ² + lĀ²).
Worked example
A 5 by 12 rectangle has an area of 60, a perimeter of 34 and a diagonal of 13.
Tips
- Use the same unit for both sides, and remember the area is in square units.
Frequently asked questions
How do I find the area of a room?
Multiply its length by its width.