Calculate quadrilaterals

Online calculators for all types of quadrilateral calculations

18+

Calculators

Areas

Calculations

Diagonals

& Perimeter

All Types

Quadrilaterals

Basic quadrilaterals

Quadrilateral (Square)
Square

Perfect symmetry - four equal sides and right angles.

Quadrilateral (Rectangle)
Rectangle

Classic shape - parallel sides and right angles.

Quadrilateral (Golden Rectangle)
Golden Rectangle

Harmonious proportions based on the golden ratio φ ≈ 1.618.

Quadrilateral (Square - Rectangle)
Rectangle and Square

Comparison calculator for rectangles and squares.

Parallelograms and rhombuses

Parallelogram
Parallelogram

Calculation from given sides and angles.

Parallelogram
Parallelogram Area

Area calculation from side and height.

Parallelogram
Rhombus (Diamond)

Equal-sided parallelogram with four equal sides.

Parallelogram
Rhombus Area

Area calculation from diagonals e and f.

Kite quadrilaterals

Kite
Kite

Symmetric quadrilateral with two pairs of equal adjacent sides.

Kite
Kite Area

Area calculation from diagonals e and f.

Kite
Half-Square Kite

Special kite quadrilateral formed from half a square.

Kite
Right Kite

Kite quadrilateral with at least one right angle.

Special and complex quadrilaterals

General Quadrilateral
General Quadrilateral

Arbitrary quadrilateral with four different sides.

Cyclic Quadrilateral
Cyclic Quadrilateral

Quadrilateral inscribed in a circle - Ptolemy's theorem.

Concave Quadrilateral
Concave Quadrilateral

Non-convex quadrilateral with inward-pointing vertex.

Arrow Quadrilateral
Arrowhead Quadrilateral

Arrow-shaped quadrilateral for navigation and design.

Crossed Quadrilateral
Crossed Square

Self-intersecting quadrilateral with crossing geometry.

Frame Quadrilateral
Frame

Rectangular frame - inner and outer area.

Trapezoids

Collection of trapezoid calculators and formulas.

What makes our quadrilateral calculators special?
Complete calculations

All parameters: area, perimeter, diagonals, angles and special properties for every quadrilateral type.

All quadrilateral types

From simple squares to complex crossed quadrilaterals - all shapes covered.

Mathematical depth

Detailed formulas, calculation methods and geometric relationships for understanding and learning.

Related calculator categories
2D Geometry
3D Geometry
Related areas
Mathematical foundations of quadrilaterals
Classical geometry

Quadrilaterals form a fundamental class of geometric figures. From Euclid's Elements through modern differential geometry - quadrilaterals are essential for understanding plane geometry, trigonometry and analytical methods.

Practical applications

These calculators are indispensable in architecture, surveying, mechanical engineering, computer graphics, urban planning and everywhere precise quadrilateral calculations are required for design, construction or analysis.

Special features of our quadrilateral calculators
Precise algorithms

High-accuracy mathematical calculations for all quadrilateral parameters

Visual representation

Graphical display of calculated quadrilaterals and their properties

Learning support

Detailed formulas and explanations for education and understanding

Responsive design

Optimized for all devices - smartphone, tablet and desktop