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) = 3.240756e-19 Parsec (pc).
| Centimeter (cm) | Parsec (pc) |
|---|---|
| 0.1 | 3.240756e-20 |
| 0.5 | 1.620378e-19 |
| 1 | 3.240756e-19 |
| 2 | 6.481511e-19 |
| 5 | 1.620378e-18 |
| 10 | 3.240756e-18 |
| 25 | 8.101889e-18 |
| 50 | 1.620378e-17 |
| 100 | 3.240756e-17 |
| 500 | 1.620378e-16 |
| 1000 | 3.240756e-16 |
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 parsec is an astronomical unit of length defined as the distance at which one astronomical unit subtends an angle of one arcsecond.
1 pc = 3.0857 × 10¹⁶ m = 3.2616 ly = 206,265 AU ≈ 30.857 trillion km.
To convert pc to light-years: multiply by 3.2616. To convert pc to AU: multiply by 206,265.
Stellar catalogs, galaxy surveys, and cosmological distance calculations.
No known star is within 1 parsec of the Sun. Proxima Centauri is 1.30 pc away, making it the nearest star.
Pronouncing or interpreting 'parsec' as a unit of time (famously misused in Star Wars). It is strictly a distance unit.
The parsec is defined geometrically: if a star's parallax (apparent shift over 6 months) is 1 arcsecond, it's 1 pc away.



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