Convert Kilometers to Megaparsecs
Convert Kilometers (km) to Megaparsecs (Mpc) instantly and accurately.
Conversion Formula
Mpc = km × 3.240779289e-20
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 Megaparsecs
A megaparsec (Mpc) is one million parsecs or 3.26 million light years, the standard unit for measuring intergalactic distances. The Andromeda Galaxy is about 0.77 megaparsecs away, while most galaxies in the observable universe are measured in megaparsecs. The Local Group of galaxies spans about 3 megaparsecs. Astronomers use megaparsecs in combination with redshift measurements to calculate distances to distant galaxies and study the expansion of the universe. The Hubble constant, describing cosmic expansion, is expressed in kilometers per second per megaparsec.
Quick Reference Table
| Kilometers (km) | Megaparsecs (Mpc) |
|---|---|
| 1 km | 3.241 × 10-20 Mpc |
| 2 km | 6.482 × 10-20 Mpc |
| 5 km | 1.62 × 10-19 Mpc |
| 10 km | 3.241 × 10-19 Mpc |
| 25 km | 8.102 × 10-19 Mpc |
| 50 km | 1.62 × 10-18 Mpc |
| 100 km | 3.241 × 10-18 Mpc |