Rhombus Calculator

  • Enter the values for side length, altitude, diagonal 1, diagonal 2, angle A, and angle B.
  • Select the appropriate units for each input.
  • Click "Calculate" to perform the calculations and view the results.
  • Click "Clear" to reset the input fields, results, and calculation details.
  • Click "Copy" to copy the results to the clipboard.

Calculation Details:

Calculation History:


The Rhombus Calculator is a valuable mathematical tool that enables users to compute various properties and attributes of rhombi, a type of quadrilateral characterized by its equal-length sides and opposite angles. This tool is designed to simplify complex calculations involving rhombi, making it an indispensable resource for students, teachers, mathematicians, and professionals in various fields.

Understanding the Rhombus

A rhombus, also known as a diamond or rhomb, is a quadrilateral with several distinct characteristics:

  1. Equal-Length Sides: All four sides of a rhombus have the same length, denoted as “s.”
  2. Opposite Angles: The opposite angles of a rhombus are congruent. In other words, if one pair of opposite angles measures θ degrees, the other pair also measures θ degrees.
  3. Diagonals Bisect Each Other: The diagonals of a rhombus intersect at a right angle and bisect each other. This means that they divide the rhombus into four congruent right triangles.

Key Formulae for Rhombi

To fully understand and utilize the Rhombus Calculator, it’s essential to be familiar with the fundamental formulae associated with rhombi:

1. Perimeter (P)

The perimeter of a rhombus can be calculated as: P = 4s Where “s” is the length of one side of the rhombus.

2. Area (A)

The area of a rhombus can be determined by: A = (d₁ * d₂) / 2 Where “d₁” and “d₂” are the lengths of the two diagonals of the rhombus.

3. Diagonal Length (d)

The length of a diagonal in a rhombus can be found using the Pythagorean theorem, given by: d = √(s² + s²) d = s√2

4. Angle Measures (θ)

The measure of each angle in a rhombus can be calculated as: θ = arccos(1/2) θ ≈ 63.43 degrees

Example Calculations

Let’s demonstrate how to use the Rhombus Calculator with some example calculations:

Example 1: Perimeter and Area

Suppose we have a rhombus with side length (s) of 6 units, and we want to find its perimeter and area.

  1. Perimeter (P): P = 4s P = 4 * 6 P = 24 units
  2. Area (A): A = (d₁ * d₂) / 2 A = (6 * 6) / 2 A = 18 square units

Example 2: Diagonal Length

Given a rhombus with a side length (s) of 8 units, let’s find the length of its diagonals.

Diagonal Length (d): d = s√2 d = 8√2 ≈ 11.31 units

Real-World Use Cases

The Rhombus Calculator has practical applications in various fields:

Architecture and Construction

Architects and engineers use rhombi in designing structures such as diamond-shaped windows or decorative tiles. The calculator helps determine the dimensions required for these elements.

Land Surveying

Surveyors use rhombus properties when working with land plots or property boundaries. Calculating diagonal lengths accurately is essential for accurate land measurements.

Graphic Design

Graphic designers incorporate rhombus shapes into logos, packaging, and other design elements. The calculator aids in creating symmetrical and visually pleasing rhombus-based designs.

Mathematics Education

In educational settings, the Rhombus Calculator serves as a valuable learning tool, helping students grasp the geometric properties of rhombi and reinforcing their understanding of mathematical formulae.


The Rhombus Calculator simplifies complex calculations related to rhombi, making it a versatile tool for a wide range of applications. With its ability to compute perimeter, area, diagonal length, and angle measures, it is an invaluable resource for professionals in architecture, construction, land surveying, graphic design, and mathematics education. By streamlining rhombus analysis, this tool enhances efficiency and accuracy in various fields, making it an indispensable asset for both students and professionals.


  1. Johnson, R. (2009). Advanced Geometry for Architectural Design. Wiley.
  2. Surveying and Land Information Systems. (1999). John Wiley & Sons.
  3. Reimer, L., & Reimer, K. (2014). Graphic Design for Architects: A Manual for Visual Communication. Taylor & Francis.

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