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Rectangle Calculator

Calculate area, perimeter, diagonal, and other properties of rectangles

Rectangle Dimensions

cm
cm

Results

Area
50.00
cm²
Perimeter
30.00
cm
Diagonal
11.18
cm
Aspect Ratio
2:1
Width:Height

Rectangle Visualization

Rectangle Properties & Formulas

About Rectangles

A rectangle is a quadrilateral with four right angles. Opposite sides are parallel and equal in length.

Area

The area of a rectangle is the amount of space it covers. It's calculated by multiplying length by width.

Perimeter

The perimeter is the total distance around the rectangle. It's calculated by adding all four sides.

Diagonal

The diagonal is the straight line connecting opposite corners. It divides the rectangle into two right triangles.

Calculation Formulas

Area (A):

A = length × width

Perimeter (P):

P = 2 × (length + width)

Diagonal (D):

D = √(length² + width²)

Aspect Ratio:

Aspect Ratio = length : width