Free online rectangle calculator – Calculate the area, perimeter, and diagonal of a rectangle with our easy-to-use Rectangle Calculator. Simply enter the length and width of the rectangle and get instant results
What is a rectangle?
The rectangle is a basic shape with four straight sides and four right angles. It is a parallelogram, and its opposite sides are parallel and equal in length. A rectangle with four sides of equal length is a square.
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- Area of a rectangle = length x breadth = a x b
- Perimeter of a rectangle = 2(length + breadth) = 2(a + b)
- Diagonal of a rectangle = √(length²+breadth²) = √(l²+b²)
- Where a→ length and b→ breadth
Properties of a rectangle
☉ Opposite sides of a rectangle are equal in length, and the two angled sides on the parallelogram are each equal in length to its base.
☉ A rectangle is a four-sided object that has exactly 90-degree angles at each of its corners
☉ In a rectangle, because a diagonal bisects the rectangle into two congruent triangles, those two triangles will also be congruent to each other.
How to use this Rectangle calculator
Rectangle calculator is a tool with the help of which you can calculate the area of a rectangle, the diagonal of a rectangle and the perimeter of a rectangle. Enter the length of the rectangle and the width of the rectangle and click on the ‘calculate’ button.