Rectangle Calculator

rectangle diagram

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.

check also- square meter calculator


Rectangle formula 

  • 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.

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