Area of a Rhombus Calculator

A = (d₁ × d₂) / 2 — half the product of the diagonals.

Inputs

Result

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General calculation reads

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How to use this calculator

  • Measure both diagonals.
  • Read the area.

About this calculator

A rhombus has four equal-length sides and diagonals that meet at right angles. The diagonal formula (d₁ × d₂ / 2) is convenient because diagonals are easy to measure with a tape across the corners. Equivalent: A = side² × sin(angle).

Frequently asked

Are the rhombus diagonals always perpendicular?+
Yes — that's a defining property. They also bisect each other (cross at their midpoints).
How is a rhombus different from a square?+
A square is a rhombus with right angles between sides. Both have 4 equal sides.
Can I use base × height for a rhombus?+
Yes — same formula as a parallelogram, since a rhombus is a parallelogram.
How do I find side length from diagonals?+
s = ½ × √(d₁² + d₂²) — half each diagonal forms a right-triangle leg.
What's a kite vs a rhombus?+
Both have perpendicular diagonals. A rhombus has all 4 sides equal; a kite has two pairs of consecutive equal sides (so two distinct lengths).

Related calculators

Area of a Square Calculator
A = s² where s is the side length.
Area of a Parallelogram Calculator
A = base × height (perpendicular height).
Area of a Rectangle Calculator
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Area of a Trapezoid Calculator
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Pythagorean Theorem Calculator
a² + b² = c². Solve for hypotenuse or missing leg of a right triangle.
Distance Between Two Points (2D + 3D)
d = √(Δx² + Δy² [+ Δz²]). Pythagorean distance in the plane or 3-space.

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