Free Online Rhombus Calculator

Calculate Rhombus Properties

Please enter a positive value for the side length.
Angle must be between 0 and 180 degrees (exclusive).
Please enter an angle between 0 and 180 degrees.

Unlock the geometry of a rhombus with our intuitive Rhombus Calculator. Easily compute the area, perimeter, side length, and both diagonals using just two known measurements: its side length and one interior angle. This tool is perfect for students, educators, and professionals needing quick, accurate calculations for rhombus properties without complex manual formulas.

Formula:

This calculator determines the properties of a rhombus using its side length (s) and one interior angle (α). The key formulas are:

  • Area (A) = s2 × sin(α)
  • Perimeter (P) = 4 × s
  • Diagonal 1 (d1) = 2 × s × sin(α/2)
  • Diagonal 2 (d2) = 2 × s × cos(α/2)

Where α is the input angle in degrees, converted to radians for trigonometric functions, and s is the length of one side.

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