Kite Calculator (A = ½d₁d₂)

The calculator applies the exact formula A = ½·d₁·d₂, P = 2(a + b). Worked example: d₁ = 10 cm, d₂ = 6 cm → A = 30 cm²; sides 5,5,7,7 → P = 24 cm. Keep every input in one unit system and the result follows in square units (m², ft², cm²); full precision is kept until the final rounding. All side lengths must share one unit or the area comes out scaled wrongly.

1. 1

   Enter the measurements

   Type the values required by the formula for kite area and perimeter.

2. 2

   Check the units

   One unit system throughout — cm, m, ft or in.

3. 3

   Read the result

   The calculator substitutes, evaluates and rounds only at the end.

• 1

  Area scales with the square of linear dimensions

• 2

  1 m² = 10.764 ft² for quick conversion

• 3

  Sketch and label the shape before entering values

• Unit mix-ups between cm² and m² (factor 10,000)

• Using a slanted length as a perpendicular height

• Treating an irregular shape as regular