Enter either the length or width of a golden rectangle into the calculator to determine the missing side length.

## Golden Rectangle Ratio Formula

The following formula is used to calculate a golden rectangle ratio.

(a+b)/a = a/b = 1.6180339..

- Where a is the length
- b is the width
- and 1.6180399 is the golden ratio

## Golden Rectangle Ratio Definition

A golden rectangle is defined as a rectangle whose length to width ratio is equal to the golden ratio which is approximately 1.6180399.

## Golden Rectangle Ratio Example

How to calculate a golden rectangle ratio?

**First, determine the length or width.**Determine or calculate the length or width of the rectangle.

**Next, determine the missing value.**Calculate the missing length or width using the golden ratio and equation above.

## FAQ

**What is a golden rectangle ratio?**

A golden rectangle is a rectangle whos ratio of length to width is equal to the golden ratio of 1.6180399.