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`PC = f( km )`

Enter a value for all fields

The **Kilometers to Parsecs**calculator converts a measurement of length in kilometers to parsecs.

**INSTRUCTIONS:** Choose units and enter the following:

- (
**km**) This is the distance in kilometers

**Parsec(PC)**: The calculator returns the distance in parsecs. However, this can be automatically converted to other units via the pull-down menu.

A parsec was traditionally defined as the distance where one astronomical unit subtends an angle of one arcsecond. A parsec was redefined in 2015 to `648000/π` astronomical units. Proxima Centauri, is the nearest star to the Sun and is approximately 1.3 parsecs (4.2 light-years) from the Sun.

Parsecs are often used in astronomy calculations is a simple linear transform.