Rhombus Area Calculator

Work out rhombus area instantly with clear inputs, formula shown and shareable results.

About Rhombus Area Calculator

The diagonals of a rhombus bisect each other at right angles, so the shape splits into four congruent right triangles and the area is half the product of the diagonals.

Formulas

Area from diagonals

A = ½ · d₁ · d₂

Side

s = √[(d₁/2)² + (d₂/2)²]

Worked example

With the default values below, Rhombus Area Calculator returns Area of 40.0000. Change any input above and every figure here is recalculated in your browser.

Inputs used

Diagonal 1minimum 0: 10
Diagonal 2minimum 0: 8

Results

Area: 40.0000
Side length: 6.4031
Perimeter: 25.6125
Perpendicular height: 6.2470

Step by step

1Values used
2Area from diagonals
3Side
4Area= 40.0000
5Side length= 6.4031
6Perimeter= 25.6125
7Perpendicular height= 6.2470

Assumptions and limits

The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Is every rhombus a parallelogram?

Yes. A rhombus is a parallelogram with all four sides equal; a square is a rhombus with right angles.

Can I use the diagonal formula on any quadrilateral?

Only if the diagonals are perpendicular. Otherwise use A = ½·d₁·d₂·sin θ.