Instant · Precise · Universal
32 units available
6 categories total
To convert cm to inches: divide by 2.54. To convert inches to cm: multiply by 2.54.
1 cm = 0.01 m = 10 mm = 0.3937 inches. There are 2.54 cm in one inch.
For example, 1 Centimeter (cm) = 1.573130e-9 Earth's Polar Radius (R⊕ (polar)).
| Centimeter (cm) | Earth's Polar Radius (R⊕ (polar)) |
|---|---|
| 0.1 | 1.573130e-10 |
| 0.5 | 7.865652e-10 |
| 1 | 1.573130e-9 |
| 2 | 3.146261e-9 |
| 5 | 7.865652e-9 |
| 10 | 1.573130e-8 |
| 25 | 3.932826e-8 |
| 50 | 7.865652e-8 |
| 100 | 1.573130e-7 |
| 500 | 7.865652e-7 |
| 1000 | 0.000001573130355 |
The centimeter is a unit of length equal to one hundredth of a meter (10⁻² m), or 10 millimeters.
1 cm = 0.01 m = 10 mm = 0.3937 inches. There are 2.54 cm in one inch.
To convert cm to inches: divide by 2.54. To convert inches to cm: multiply by 2.54.
Measuring height, waist circumference, screen sizes, furniture dimensions, and map scales.
The CGS system was the primary scientific system for over a century. 1 cm is roughly the width of an adult fingernail.
Confusing cm and inches — a common error in international contexts. Always verify which system a measurement uses.
Your fingernail width is roughly 1 cm — a handy mental reference that's always available.
The Earth's polar radius is the distance from Earth's center to either pole, approximately 6,356.752 km.
R⊕(polar) = 6,356,752.3 m. It is about 21.385 km shorter than the equatorial radius.
To convert Earth polar radii to meters: multiply by 6,356,752.3.
Geodetic calculations, gravity modeling, and precise cartography near the poles.
At the poles, you are about 21 km closer to Earth's center than at the equator — you weigh very slightly more!
Approximating Earth as a perfect sphere — the difference between equatorial and polar radii matters for precision applications.
Earth's shape (oblate spheroid) is like a slightly squished ball — wider at the equator, flatter at the poles.



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