Free Quadrilateral Calculator - Given 4 points entered, this determines the area using Brahmaguptas Formula and perimeter of the quadrilateral formed by the points as well as checking to see if the quadrilateral (quadrangle) is a parallelogram.

This calculator has 4 inputs.

This calculator has 4 inputs.

Perimeter of ABCD = AB + BC + CD +AD

s = ½P

A = √(s - a)(s - b)(s - c)(s - d)

For more math formulas, check out our Formula Dossier

s = ½P

A = √(s - a)(s - b)(s - c)(s - d)

For more math formulas, check out our Formula Dossier

- parallelogram
- simple quadrilateral with two pairs of parallel sides.
- perimeter
- The distance around a shape or object
- quadrilateral
- Polygon with 4 edges/sides and 4 corners/vertices