Convert Earth's Equatorial Radius to Megaparsec
Convert earth's equatorial radii to megaparsecs instantly. 1 earth's equatorial radius = 2.067013e-16 megaparsec — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Megaparsec to Earth's Equatorial Radius converter for the reverse conversion.
Units explained
Earth's Equatorial Radius
Earth's equatorial radius is the distance from the planet's center to its surface at the equator, defined as exactly 6,378,137 meters by the WGS84 geodetic reference system.
The WGS84 (World Geodetic System 1984) defines Earth's reference ellipsoid for use in GPS and global cartography. The 6,378,137 m equatorial value was determined through satellite and ground geodetic measurements consolidated in 1984.
WGS84's equatorial radius is the standard reference for GPS, satellite imagery, geographic information systems, and aviation navigation. It defines the 'a' parameter of Earth's reference ellipsoid in coordinate transformations.
WGS84 reference ellipsoid adopted in 1984 by the US Department of Defense; subsequently adopted globally for GPS and civilian geodesy.
Megaparsec
A megaparsec is a distance unit equal to one million parsecs (about 3.09×10²² m). It is the standard unit for cosmological-scale distances.
Combines the metric-style prefix mega- with the parsec. Standardised in astronomy for inter-galactic distances and cosmological calculations.
Megaparsecs are used in cosmology to express distances to other galaxies (Andromeda is ~0.78 Mpc), galaxy-cluster separations, and the Hubble constant (typically quoted as ~70 km/s per Mpc).
Exact via the parsec; the megaparsec is the standard scale unit in modern cosmology.
Earth's Equatorial Radius to Megaparsec conversion formula
The relationship between earth's equatorial radii and megaparsecs:
To convert earth's equatorial radii to megaparsecs, multiply the value in earth's equatorial radii by 2.067013e-16. To reverse, multiply megaparsecs by 4.837898e+15.
How to use this converter
Type a value into the calculator. The result in megaparsecs updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Megaparsec to Earth's Equatorial Radius converter for the reverse direction.
Step-by-step: convert earth's equatorial radii to megaparsecs
- Write down the value in earth's equatorial radii (R⊕,eq).
- Multiply that value by the factor 2.067013e-16.
- The product is the equivalent value in megaparsecs (Mpc).
- To reverse, multiply the megaparsec value by 4.837898e+15.
Worked examples
Example 1 — Convert 1 R⊕,eq to Mpc:
1 × 2.067013e-16 = 2.067013e-16 Mpc
Example 2 — Convert 100 R⊕,eq to Mpc:
100 × 2.067013e-16 = 2.067013e-14 Mpc
Earth's Equatorial Radius to Megaparsec conversion table
Standard reference values for converting earth's equatorial radii to megaparsecs:
| Earth's Equatorial Radius [R⊕,eq] | Megaparsec [Mpc] |
|---|---|
| 0.01 | 2.067013e-18 |
| 0.1 | 2.067013e-17 |
| 1 | 2.067013e-16 |
| 2 | 4.134027e-16 |
| 3 | 6.20104e-16 |
| 4 | 8.268054e-16 |
| 5 | 1.033507e-15 |
| 10 | 2.067013e-15 |
| 20 | 4.134027e-15 |
| 30 | 6.20104e-15 |
| 40 | 8.268054e-15 |
| 50 | 1.033507e-14 |
| 100 | 2.067013e-14 |
| 500 | 1.033507e-13 |
| 1000 | 2.067013e-13 |
Frequently asked questions
How many megaparsecs is 1 earth's equatorial radius?
How do I convert earth's equatorial radii to megaparsecs?
How do I convert megaparsecs back to earth's equatorial radii?
How many megaparsecs is 100 earth's equatorial radii?
Popular length unit conversions
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Metric / SI (4 units)
Imperial / US Customary (4 units)
Astronomical (8 units)
Sources & references
Conversion factor (1 R⊕,eq = 2.067013e-16 Mpc) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.