## Measurement unit: parsec

**Full name:** parsec

**Plural form:** parsecs

**Category type:** length

**Scale factor:** 3.0856776E+16

## SI unit: metre

The SI base unit for length is the metre.

1 metre is equal to 3.2407792700054E-17 parsec.

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

You can use this form to select from known units:

## Definition: Parsec

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: parsec