## Measurement unit: gigaparsec

**Full name:** gigaparsec

**Plural form:** gigaparsecs

**Symbol:** Gpc

**Category type:** length

**Scale factor:** 3.085678E+25

## SI unit: metre

The SI base unit for length is the metre.

1 metre is equal to 3.2407788498994E-26 gigaparsec.

Valid units must be of the **length** type.

You can use this form to select from known units:

## Definition: Gigaparsec

The SI prefix "giga" represents a factor of
10^{9}, or in exponential notation, 1E9.

So 1 gigaparsec = 10^{9} parsecs.

The definition of a parsec is as follows:

The parsec (symbol pc) is a unit of length used in astronomy. It stands for "parallax of one arc second", and is approximately 19,131,554,073,600 (19 trillion) miles.

## Sample conversions: gigaparsec