Convert Centimeter to Earth's Polar Radius
Convert centimeters to earth's polar radii instantly. 1 centimeter = 1.57313e-9 earth's polar radius — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Earth's Polar Radius to Centimeter converter for the reverse conversion.
Units explained
Centimeter
A centimeter is a metric unit of length equal to one hundredth of a meter (1/100 m). It is one of the most commonly used SI sub-units in daily life, especially for measuring small objects, body dimensions, paper sizes, and short distances.
The centimeter emerged from the French metric system established by the French Academy of Sciences in 1793. The metric system introduced decimal-based prefixes (milli-, centi-, deci-, deca-, hecto-, kilo-) to create proportional sub-units of the meter.
Centimeters are the standard unit for everyday measurement in nearly every country outside the United States. They are used for body height, clothing sizes, rainfall, paper formats (A4 is 21 × 29.7 cm), screen dimensions, and most consumer product specifications.
Developed in France during the late 18th century as part of the metric system designed by the French Academy of Sciences. Formally adopted in France in 1795 and ratified internationally through the Metre Convention signed in Paris in 1875.
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.
Centimeter to Earth's Polar Radius conversion formula
The relationship between centimeters and earth's polar radii:
To convert centimeters to earth's polar radii, multiply the value in centimeters by 1.57313e-9. To reverse, multiply earth's polar radii by 6.356752e+8.
How to use this converter
Type a value into the calculator. The result in earth's polar radii updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Earth's Polar Radius to Centimeter converter for the reverse direction.
Step-by-step: convert centimeters to earth's polar radii
- Write down the value in centimeters (cm).
- Multiply that value by the factor 1.57313e-9.
- The product is the equivalent value in earth's polar radii (R⊕,p).
- To reverse, multiply the earth's polar radius value by 6.356752e+8.
Worked examples
Example 1 — Convert 1 cm to R⊕,p:
1 × 1.57313e-9 = 1.57313e-9 R⊕,p
Example 2 — Convert 100 cm to R⊕,p:
100 × 1.57313e-9 = 1.57313e-7 R⊕,p
Real-world example — Ruler-scale measurements
A 30-centimeter school ruler converts cleanly to earth's polar radii — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 cm × 1.57313e-9 = 4.719391e-8 R⊕,p
Real-world example — Hardware-scale dimensions
A 10-centimeter fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between centimeters and earth's polar radii daily when mixing metric and imperial tools.
10 cm × 1.57313e-9 = 1.57313e-8 R⊕,p
Real-world example — Postcard and small-object dimensions
A postcard is about 5 centimeters wide. Converting to earth's polar radii is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 cm × 1.57313e-9 = 7.865652e-9 R⊕,p
Centimeter to Earth's Polar Radius conversion table
Standard reference values for converting centimeters to earth's polar radii:
| Centimeter [cm] | Earth's Polar Radius [R⊕,p] |
|---|---|
| 0.01 | 1.57313e-11 |
| 0.1 | 1.57313e-10 |
| 1 | 1.57313e-9 |
| 2 | 3.146261e-9 |
| 3 | 4.719391e-9 |
| 4 | 6.292522e-9 |
| 5 | 7.865652e-9 |
| 10 | 1.57313e-8 |
| 20 | 3.146261e-8 |
| 30 | 4.719391e-8 |
| 40 | 6.292522e-8 |
| 50 | 7.865652e-8 |
| 100 | 1.57313e-7 |
| 500 | 7.865652e-7 |
| 1000 | 1.57313e-6 |
Frequently asked questions
How many earth's polar radii is 1 centimeter?
How do I convert centimeters to earth's polar radii?
How do I convert earth's polar radii back to centimeters?
How many earth's polar radii is 100 centimeters?
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Sources & references
Conversion factor (1 cm = 1.57313e-9 R⊕,p) 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.