What formulas does this calculator use for a kite shape?

Area = 0.5 × diagonal1 × diagonal2; perimeter = 2 × (side1 + side2).

What makes a quadrilateral a kite?

It has two pairs of adjacent equal sides, and its diagonals intersect at right angles.

How is a kite different from a rhombus?

A rhombus has all four sides equal; a kite has only two pairs of equal adjacent sides.

Kite Area & Perimeter Calculator

Calculate the area and perimeter of a kite from its diagonals and side lengths.

Diagonal 1 (d₁)

Diagonal 2 (d₂)

Short Side (a) – optional

Long Side (b) – optional

Area0

Perimeter—

What Is a Kite?

In geometry, a kite is a quadrilateral (four-sided shape) with two pairs of adjacent sides that are equal in length, and one pair of opposite angles that are equal. Its two diagonals are perpendicular to each other, and one diagonal bisects the other — this perpendicularity is exactly what makes the area formula so simple.

How to Use This Calculator

Enter the lengths of the two diagonals (d₁ and d₂) to calculate the area.
Optionally enter the two distinct side lengths (a and b) to also calculate the perimeter.
Click "Calculate Kite" to see the results instantly.

Formulas Used

Area = (d₁ × d₂) ÷ 2

Perimeter = 2 × (a + b)

Worked Example

For a kite with diagonals of 12 and 8 units: Area = (12 × 8) ÷ 2 = 48 square units. If the two distinct side lengths are 5 and 7 units, Perimeter = 2 × (5 + 7) = 24 units.