# Phi Symbol

The Greek letter phi (φ) is used in geometry as a constant to represent the golden ratio.

Symbol Format Data
φ Unicode
966

TeX
\phi
SVG

### Usage

Golden Ratio | Concept

The golden ratio is a number represented by the greek letter ϕ (phi). The value of ϕ is approximately 1.618 and is a naturally occurring number in nature. The golden ratio is often associated with the golden rectangle whose sides form a ratio equal to ϕ.

Golden Rectangle | Concept

The golden rectangle is a rectangle whose width divided by height is equal to the golden number (approximately 1.618).

Greek Alphabet | Concept

The Greek Alphabet is used throughout math to represent variables, constants, and coeffecients within math expressions, formulas, and equations.

### Related Symbols

Capital Phi | Symbol

The capital Greek letter (Φ).