Math
Kite area from diagonals
Calculate the area of a kite from its two perpendicular diagonals; the diagonals alone do not determine its perimeter.
Calculators / Math / Rhombus from diagonals
Rhombus from diagonals calculator
Use the perpendicular diagonals of a rhombus to find its area; their half-lengths form a right triangle that determines each side and the perimeter.
On this page
Area24units²
Perimeter20units
Calculator controls
How to calculate
Use the perpendicular diagonals of a rhombus to find its area; their half-lengths form a right triangle that determines each side and the perimeter.
Area = a*b/2 units²; Perimeter = 2*sqrt(a^2+b^2) units
Worked example
First diagonal: 6; Second diagonal: 8.
Area: 24 units²; Perimeter: 20 units.
Assumptions and limits
Use the perpendicular diagonals of a rhombus to find its area; their half-lengths form a right triangle that determines each side and the perimeter. Use the same length unit throughout. Angles marked degrees use degrees. Results describe ideal geometric shapes.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Use the perpendicular diagonals of a rhombus to find its area; their half-lengths form a right triangle that determines each side and the perimeter.
When this tool is useful
Area = a*b/2 units²; Perimeter = 2*sqrt(a^2+b^2) units
Understanding your inputs
| Input | What to enter |
|---|---|
| First diagonal | Enter a number of at least 1e-12 and no more than 1000000000000. |
| Second diagonal | Enter a number of at least 1e-12 and no more than 1000000000000. |
Frequently asked questions
What assumptions does this calculation use?
Use the perpendicular diagonals of a rhombus to find its area; their half-lengths form a right triangle that determines each side and the perimeter. Use the same length unit throughout. Angles marked degrees use degrees. Results describe ideal geometric shapes.
How is the result calculated?
Area = a*b/2 units²; Perimeter = 2*sqrt(a^2+b^2) units