# Greek Capital Letter Tau

Τ
Symbol Format Data
Τ Code Point
U+03A4
TeX
\Tau
SVG

## Usage

The capital Greek letter (capital tau) is visually very similar to the Latin capital letter T. For that reason, refer to the usage of Capital T for how the symbol appears in math.

## Related

The Greek letter τ (tau) is used in trigonometry as a constant to represent a full rotation around a circle in radians. The value of τ is approximately 6.28 and can be calculated by dividing any circle's circumference by its radius.