Side a
161.8
Side b
100
a + b
261.8
Phi = 1.6180339887. The golden rule: a / b = (a + b) / a.
Frequently asked questions
What is the golden ratio?
A proportion of about 1.618 to 1, found in nature, art and classic design. Dividing a longer segment by 1.6180339887 gives its golden-ratio shorter partner.
How do I use this calculator?
Enter the longer side and press Find b, or enter the shorter side and press Find a. The tool also shows the total length and draws a true-proportion golden rectangle.
Where is the golden ratio used in design?
For balanced layouts: hero image proportions, logo spacing, typography scales and card dimensions. It is a guide for pleasing proportions, not a strict rule.
Preview
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