Quadrilateral Calculator

Calculate common measurements for rectangles, parallelograms, trapezoids, rhombi, and kites.

Last updated: June 2026 | By Patchworkr Team

Length

Width

Math check: area = length x width

Result

Enter values for the selected shape to compute its properties.

Formula

rectangle: area = length x width

parallelogram: area = base x height

trapezoid: area = (base1 + base2) x height / 2

rhombus / kite: area = diagonal1 x diagonal2 / 2

A rectangle with length 5 and width 3 has area 15, perimeter 16, and diagonal about 5.830952.

A trapezoid with bases 60 and 40, height 30, and leg 35 has area 1500 and perimeter 170.

This calculator treats each quadrilateral type separately so the inputs and formulas stay consistent with the chosen shape.

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