Rhombus Calculator
Calculate the area, side length, and perimeter of a rhombus from its two diagonals.
- Side length
- 5
- Perimeter
- 20
Formula: A = (d₁ × d₂) / 2
About Rhombus Calculator
Rhombus Calculator is a free online calculator that gives you an instant, accurate result as you type. Calculate the area, side length, and perimeter of a rhombus from its two diagonals.
The calculation uses the standard formula A = (d₁ × d₂) / 2 and updates live with every change to the inputs. Everything runs client-side in your browser — fast, private, and free to use as often as you like.
The diagonals of a rhombus always bisect each other at right angles, which is why the side length can be found from the diagonals alone.
Frequently Asked Questions
Is Rhombus Calculator free to use?
Yes. Rhombus Calculator is completely free, with no sign-up, no downloads, and no usage limits. You can use it as many times as you like on any device with a web browser.
How accurate is this calculator?
The calculator applies the standard formula (A = (d₁ × d₂) / 2) with full floating-point precision and rounds only the displayed result. For most practical purposes the results are exact.
Is a rhombus the same as a diamond?
Informally yes — a "diamond" shape is a rhombus: a quadrilateral with four equal sides. A square is a special rhombus with right angles.
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