A rhombus calculator computes area and perimeter from the diagonals or side length and angle. A rhombus is a parallelogram with all four sides equal

How accurate is the Rhombus calculator?

The calculator uses the standard published formula for rhombus. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Rhombus calculator use?

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Rhombus calculator use?

The core formula is: Area (diagonals): A = (d₁ × d₂) / 2. Each step in the calculation is shown so you can verify the result manually.

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Rhombus Area Calculator

Rhombus Calculator

A = (p×q)/2 | Side = √((p/2)²+(q/2)²) | All sides equal

Diagonal p

Diagonal q

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Reviewed October 2026

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Rhombus Area Calculator

Rhombus Calculator

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