Rhombus Calculator
Calculate area, perimeter and angles of a rhombus from its side and diagonals.
Inputs
units
units
Area
48.0000sq units
Perimeter
28.8444units
Side Length
7.2111units
Acute Angle
67.3801°
Obtuse Angle
112.6199°
Step by step
Area from diagonals
A = (12 × 8) / 2
= 48
Side length
s = √((12/2)² + (8/2)²)
= 7.2111
Perimeter
P = 4 × 7.2111
= 28.8444
How it works
A rhombus has four equal sides with diagonals that bisect each other at right angles. Area = ½ × d₁ × d₂. Each side = √((d₁/2)² + (d₂/2)²).
Formulas
Area
A = (d₁ × d₂) / 2
- d₁
- First diagonal
- d₂
- Second diagonal
Side
s = √((d₁/2)² + (d₂/2)²)
- d₁
- First diagonal
- d₂
- Second diagonal
Frequently Asked Questions
Is a square a special rhombus?
Yes — a square is a rhombus where both diagonals are equal.
Do the diagonals of a rhombus bisect the angles?
Yes — each diagonal bisects a pair of opposite vertex angles.