Convert Kilometers to Parsecs
Convert Kilometers (km) to Parsecs (pc) instantly and accurately.
Conversion Formula
pc = km × 3.240779289e-14
About Kilometers
A kilometer (km) is 1,000 meters and the standard unit for measuring longer distances in most of the world. It takes about 10-12 minutes to walk one kilometer at a normal pace. Common references include: a typical city block might be 100-200 meters (0.1-0.2 km), most cars display speed in km/h, and marathon races are 42.195 kilometers long. Road signs, GPS systems, and maps globally use kilometers to indicate distances between cities and locations.
About Parsecs
A parsec (pc) is approximately 3.26 light years or 30.86 trillion kilometers, defined as the distance at which one astronomical unit subtends an angle of one arcsecond. Despite being less familiar than light years, parsecs are preferred by professional astronomers because they relate directly to stellar parallax measurements - the apparent shift in a star's position as Earth orbits the Sun. Most nearby stars are within a few dozen parsecs, our galaxy is about 30,000 parsecs across, and distant galaxies are measured in millions of parsecs (megaparsecs).
Quick Reference Table
| Kilometers (km) | Parsecs (pc) |
|---|---|
| 1 km | 3.241 × 10-14 pc |
| 2 km | 6.482 × 10-14 pc |
| 5 km | 1.62 × 10-13 pc |
| 10 km | 3.241 × 10-13 pc |
| 25 km | 8.102 × 10-13 pc |
| 50 km | 1.62 × 10-12 pc |
| 100 km | 3.241 × 10-12 pc |