Convert Earth's Polar Radius to Parsec
Convert earth's polar radii to parsecs instantly. 1 earth's polar radius = 2.060083e-10 parsec — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Parsec to Earth's Polar Radius converter for the reverse conversion.
Units explained
Earth's Polar Radius
Earth's polar radius is the distance from the planet's center to either pole, approximately 6,356,752 meters under the WGS84 geodetic reference system. The polar radius is about 21 km shorter than the equatorial radius due to Earth's oblate spheroid shape.
Derived from WGS84's flattening parameter (f ≈ 1/298.257); the difference from the equatorial radius is the geometric signature of Earth's rotational oblateness.
Earth's polar radius is used in geodesy, satellite-orbit calculations, and global cartography. Together with the equatorial radius it defines Earth's reference ellipsoid in WGS84.
Derived from the WGS84 reference ellipsoid adopted in 1984; the value is computed from the equatorial radius minus the oblateness.
Parsec
A parsec (parallax-second) is a distance unit equal to 648,000/π astronomical units — approximately 3.086×10¹⁶ m (3.26 light years). It is the standard distance unit in professional astronomy.
Defined as the distance at which one astronomical unit subtends an angle of one arcsecond. IAU Resolution B2 in 2015 made this an exact definition: 1 pc = (648,000/π) AU.
Parsecs are used in professional astronomy for stellar distances (Proxima Centauri ≈ 1.3 pc), galactic-scale distances (with prefixes kiloparsec and megaparsec), and parallax measurements. Standard since the early 20th century.
Concept introduced by Herbert Hall Turner in 1913; exact definition via the AU adopted by IAU Resolution B2 in 2015.
Earth's Polar Radius to Parsec conversion formula
The relationship between earth's polar radii and parsecs:
To convert earth's polar radii to parsecs, multiply the value in earth's polar radii by 2.060083e-10. To reverse, multiply parsecs by 4.854173e+9.
How to use this converter
Type a value into the calculator. The result in parsecs updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Parsec to Earth's Polar Radius converter for the reverse direction.
Step-by-step: convert earth's polar radii to parsecs
- Write down the value in earth's polar radii (R⊕,p).
- Multiply that value by the factor 2.060083e-10.
- The product is the equivalent value in parsecs (pc).
- To reverse, multiply the parsec value by 4.854173e+9.
Worked examples
Example 1 — Convert 1 R⊕,p to pc:
1 × 2.060083e-10 = 2.060083e-10 pc
Example 2 — Convert 100 R⊕,p to pc:
100 × 2.060083e-10 = 2.060083e-8 pc
Earth's Polar Radius to Parsec conversion table
Standard reference values for converting earth's polar radii to parsecs:
| Earth's Polar Radius [R⊕,p] | Parsec [pc] |
|---|---|
| 0.01 | 2.060083e-12 |
| 0.1 | 2.060083e-11 |
| 1 | 2.060083e-10 |
| 2 | 4.120166e-10 |
| 3 | 6.180249e-10 |
| 4 | 8.240332e-10 |
| 5 | 1.030042e-9 |
| 10 | 2.060083e-9 |
| 20 | 4.120166e-9 |
| 30 | 6.180249e-9 |
| 40 | 8.240332e-9 |
| 50 | 1.030042e-8 |
| 100 | 2.060083e-8 |
| 500 | 1.030042e-7 |
| 1000 | 2.060083e-7 |
Frequently asked questions
How many parsecs is 1 earth's polar radius?
How do I convert earth's polar radii to parsecs?
How do I convert parsecs back to earth's polar radii?
How many parsecs is 100 earth's polar radii?
Popular length unit conversions
Convert Earth's Polar Radius to other length units
Show all Earth's Polar Radius conversions
Metric / SI (4 units)
Imperial / US Customary (4 units)
Astronomical (8 units)
Sources & references
Conversion factor (1 R⊕,p = 2.060083e-10 pc) 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.