Earth radius
The Earth radius here is the mean volumetric radius, 6,371 kilometres, the radius of a sphere with the same volume as the Earth. It is the value used in almost every geophysical formula that treats the planet as a sphere, and it is the standard unit for reporting the sizes of rocky exoplanets.
Watch out: The Earth is an oblate spheroid, so there is no single radius. The equatorial radius is 6,378.137 km and the polar radius 6,356.752 km, a difference of 21 km. The IAU nominal value used for exoplanet radii is the equatorial one, so an exoplanet quoted at "1.0 R⊕" is being compared against 6,378 km rather than the 6,371 km here.
| 1 | 6,371,000 |
One earth radius in every length unit
| 3.94183e+41 | Planck length (lP) | |
| 6.37100e+21 | femtometer (fm) | |
| 6.37100e+18 | picometer (pm) | |
| 1.20394e+17 | bohr radius (a0) | |
| 6.37100e+16 | angstrom (Å) | |
| 6.37100e+15 | nanometer (nm) | |
| 6,371,000,000,000 | micrometer (μm) | |
| 250,827,000,000 | thou (thou) | |
| 18,059,500,000 | point (pt) | |
| 6,371,000,000 | millimeter (mm) | |
| 1,504,960,000 | pica (pc) | |
| 637,100,000 | centimeter (cm) | |
| 250,827,000 | inch (in) | |
| 63,710,000 | decimeter (dm) | |
| 62,706,700 | hand (hh) | |
| 31,670,000 | link (li) | |
| 20,902,200 | foot (ft) | |
| 20,902,200 | US survey foot (ftUS) | |
| 6,967,410 | yard (yd) | |
| 6,371,000 | meter (m) | |
| 3,483,710 | fathom (ftm) | |
| 1,266,800 | rod (rd) | |
| 316,700 | chain (ch) | |
| 34,400.6 | cable length (cb) | |
| 31,670 | furlong (fur) | |
| 6,371 | kilometer (km) | |
| 3,958.76 | mile (mi) | |
| 3,440.06 | nautical mile (nmi) | |
| 1,319.59 | league (lea) | |
| 6.371 | megameter (Mm) | |
| 1 | Earth radius (REarth)this unit | |
| 0.0212514 | light-second (ls) | |
| 0.0165739 | lunar distance (LD) | |
| 0.00915768 | solar radius (Rsun) | |
| 0.000354189 | light-minute (lmin) | |
| 0.0000425875 | astronomical unit (AU) | |
| 6.73415e-10 | light-year (ly) | |
| 2.06470e-10 | parsec (pc) | |
| 2.06470e-13 | kiloparsec (kpc) | |
| 2.06470e-16 | megaparsec (Mpc) | |
| 2.06470e-19 | gigaparsec (Gpc) |
Solvers that use length