Golden Ratio Online Calculator

A rectangle with a side measuring: is more wonderful if it is designed with the golden ratio.

Enter the


of side

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Funny how a small dimension change makes a noticeable difference!

The golden ratio is a special number approximately equal to 1.6180339887

It appears many times in geometry, art, architecture and other areas.

In geometry, a golden rectangle is one whose side lengths are in the golden ratio ( 1:1.6180339887 approximately).

For example, if we want to design a frame, a picture, a business card, a poster, an item for the home or other object, we decide a suitable measure and insert its value here.

The calculation gives us two useful measures to complete the design of the object. We use the measurement of the left field in blue if the entered length corresponds to the shorter measurements, we use instead the right, always in a blue field, in the case that the measure inserted is the longest.

If we follow these instructions, each object will be proportioned according to the golden rule, followed by artists, designers, by the best craftsmen.

In fact, a rectangle with sides as a segment and its golden section, is called the golden rectangle.


golden.ratiogolden.sectiongolden.goldenSezione aurea di un rettangolo






The golden ratio is also called the golden section, golden mean. extreme and mean ratio, medial section, divine proportion, divine section, golden proportion, golden cut, golden number. (Latin: sectio aurea) (Italian: Sezione aurea) (German: Goldener Schnitt) (French: Nombre d'or)


In Arts, using the golden ratio has been considered the most pleasing to the eye throughout history. Go to the list of works designed with the golden ratio on Wikipedia.

The use of the Golden Ratio will result in many architectural works: Stonehenge ( prehistoric monument in Wiltshire, England), The Great Pyramid of Giza, The Parthenon (Athenian Acropolis), Arch of Constantine (Rome), Notre Dame de Paris, the headquarters of the United Nations New York City ...

The use of the Golden Ratio will result also in more harmonious design and some famous artists used the Golden Ratio: Leonardo da Vinci, Luca Pacioli, Michelangelo, Albrecht Dürer, Salvador Dali, Piet Mondrian, Le Corbusier ...