Area of a Rhombus Calculator
A = (d₁ × d₂) / 2 — half the product of the diagonals.
Result
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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).
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