Golden Ratio Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter a known length.
- Read the longer (×φ) and shorter (÷φ) parts.
How it works
The golden ratio φ ≈ 1.618; multiplying or dividing by it gives the harmonious partner length.
Worked example
100. Longer 161.8, shorter 61.8.
Common mistakes
- Treating it as exact — φ is irrational, so results are rounded.
- Overusing it; good design isn't only proportions.
Frequently asked questions
What is the golden ratio?
A proportion (≈1.618) where the whole relates to the larger part as the larger does to the smaller — common in art and design.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.