Earth Radii to Kilometers
1 Earth Radius = 6,371.009 Kilometers · fixed factor via canonical reference constants · no offset
Direct Answer
1 Earth Radius equals 6,371.009 Kilometers
This conversion uses a fixed factor based on canonical reference constants.
For 2 Earth Radii, the result equals 12,742.018 Kilometers.
Converter Calculator
6,371.009 Kilometers (km)
SwitchExplanation
Formula: Kilometers = Earth Radii × 6,371.009. Why: AU, lunar distance, and planetary radius or diameter units are tied to fixed astronomy reference constants, so the route moves through one meter-based normalization path.
Earth Radii (R_earth): a planetary scale unit based on Earth's reference radius, useful for comparative astronomy and planetary science.
Kilometers (km): a metric distance unit often used for planetary, orbital, and near-Earth scale reporting.
This route is useful when translating everyday metric or imperial distances into astronomy reference scales, or when expressing astronomy scales in more familiar distance units.
This conversion is purely multiplicative because both units reduce through meters using fixed astronomical or geometric reference constants with no offset.
Common Conversion Values
| Earth Radii (R_earth) | Kilometers (km) |
|---|---|
| 1 | 6,371.009 |
| 2 | 12,742.018 |
| 5 | 31,855.044 |
| 10 | 63,710.088 |
| 100 | 637,100.88 |
| 1,000 | 6,371,008.8 |
Frequently Asked Questions
How is Earth Radii to Kilometers calculated?
The factor is derived by reducing both units to meters and applying the fixed planetary or solar radius/diameter reference constants for the route.
How do I reverse Earth Radii to Kilometers?
Use the mirror Kilometers to Earth Radii route; it applies the inverse relationship for the opposite direction with the same assumptions.
How many kilometers are in 1 Earth radius?
1 Earth radius is about 6,371.0088 kilometers using the fixed Earth-radius constant on this page.