Rhombus Area Calculator
Calculate the area of a rhombus from its diagonals or base and height.
The diamond shape
A rhombus is a four-sided shape with all sides equal, like a tilted square or a diamond. Its area can be found from its two diagonals, or from a base and height. This calculates it either way.
Enter the diagonals or base and height to find the area.
Two routes to the same area
The rhombus is interesting because it offers two neat ways to find its area. Like any parallelogram, it is base times height. But it also has an elegant diagonal formula: half the product of its two diagonals, which works because the diagonals of a rhombus cross at right angles and cut each other in half, dividing the shape into four right triangles whose areas add up to exactly that. This diagonal method is often the more practical one, since the diagonals of a diamond shape are frequently easier to measure than its slanted height. The rhombus sits in a neat family — a square is a rhombus with right angles, and a rhombus is a parallelogram with equal sides — so understanding its area connects several shapes. It shows up in tiling patterns, jewellery, and design wherever a diamond motif appears.
Frequently asked questions
What are the two ways to find a rhombus's area?
Base times height, like any parallelogram, or half the product of its two diagonals — the diagonal method is often easier to measure.
Why does the diagonal formula work?
Because a rhombus's diagonals cross at right angles and bisect each other, splitting it into four right triangles whose areas sum to half the diagonals' product.
Is anything uploaded?
No. The calculation happens in your browser.