Kite Area Calculator
The area of a kite from its two diagonals — half their product, the same rule as a rhombus.
A kite has two pairs of equal adjacent sides, and its diagonals meet at right angles — which is all the area formula needs.
How the kite area calculator works
A kite has two pairs of equal adjacent sides, and its diagonals meet at right angles — which is all the area formula needs. Half the product of the diagonals works for any quadrilateral whose diagonals are perpendicular, which is why kites, rhombuses and squares all share it.
Formula: square a²; rectangle ab; triangle ½bh; circle πr²; parallelogram bh; trapezoid ½(a+b)h; ellipse πab
Worked examples
| Inputs | Area | Note |
|---|---|---|
| Diagonals 12 and 7 | 42 | 42 |
| A traditional kite shape | 2,700 | 2,700 cm² |
| Equal diagonals | 32 | 32 |
FAQFrequently asked questions
What is the area of a kite?
Half the product of its diagonals — the same formula as a rhombus.
Why is it the same as a rhombus?
Because the rule holds for any quadrilateral whose diagonals cross at right angles, which both shapes do.
What makes a shape a kite?
Two pairs of equal-length sides that are adjacent rather than opposite.
Which diagonal is which?
It does not matter for the area — the product is the same either way.
How much material does a kite need?
The area, plus a hem allowance around the perimeter.
Where these figures come from
- NIST Digital Library of Mathematical Functions — reference definitions for elementary and special functions
- Wolfram MathWorld — definitions and formulas for every topic on this page
- NIST/SEMATECH e-Handbook of Statistical Methods — the statistical formulas (mean, variance, z, confidence intervals, sample size)
- Australian Curriculum (ACARA) — Mathematics — the terms and methods taught in Australian schools
Last checked: September 2026. Formulas are fixed by mathematics and do not change with tax years or regulations.