Convert Gigameters to Parsecs
Convert Gigameters (Gm) to Parsecs (pc) instantly and accurately.
Conversion Formula
pc = Gm × 3.240779289e-8
About Gigameters
A gigameter (Gm) is one billion meters (10⁹ m), making it useful for planetary measurements and inner solar system distances. The Sun's diameter is about 1.39 Gm, while Jupiter's diameter is roughly 0.14 Gm. The distance from Earth to the Moon is approximately 0.38 Gm. This unit bridges the gap between terrestrial measurements (megameters) and astronomical distances, providing a convenient scale for describing planetary sizes and nearby celestial distances in our solar system.
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
| Gigameters (Gm) | Parsecs (pc) |
|---|---|
| 1 Gm | 3.241 × 10-8 pc |
| 2 Gm | 6.482 × 10-8 pc |
| 5 Gm | 1.62 × 10-7 pc |
| 10 Gm | 3.241 × 10-7 pc |
| 25 Gm | 8.102 × 10-7 pc |
| 50 Gm | 1.62 × 10-6 pc |
| 100 Gm | 3.241 × 10-6 pc |