Centimeter to Astronomical Unit Converter
Unit Converter
Instant · Precise · Universal
32 units available
6 categories total
How to Convert Centimeter to Astronomical Unit
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) = 6.684587e-14 Astronomical Unit (AU).
Centimeter to Astronomical Unit — Common Values
| Centimeter (cm) | Astronomical Unit (AU) |
|---|---|
| 0.1 | 6.684587e-15 |
| 0.5 | 3.342294e-14 |
| 1 | 6.684587e-14 |
| 2 | 1.336917e-13 |
| 5 | 3.342294e-13 |
| 10 | 6.684587e-13 |
| 25 | 1.671147e-12 |
| 50 | 3.342294e-12 |
| 100 | 6.684587e-12 |
| 500 | 3.342294e-11 |
| 1000 | 6.684587e-11 |
About Centimeter (cm)
Definition
The centimeter is a unit of length equal to one hundredth of a meter (10⁻² m), or 10 millimeters.
Mathematical Relationship
1 cm = 0.01 m = 10 mm = 0.3937 inches. There are 2.54 cm in one inch.
Conversion Formula
To convert cm to inches: divide by 2.54. To convert inches to cm: multiply by 2.54.
Practical Applications
Measuring height, waist circumference, screen sizes, furniture dimensions, and map scales.
Interesting Facts
The CGS system was the primary scientific system for over a century. 1 cm is roughly the width of an adult fingernail.
Common Mistakes
Confusing cm and inches — a common error in international contexts. Always verify which system a measurement uses.
Educational Tips
Your fingernail width is roughly 1 cm — a handy mental reference that's always available.
About Astronomical Unit (AU)
Definition
The astronomical unit is a unit of length approximating the mean Earth-Sun distance, defined as exactly 149,597,870,700 meters.
Mathematical Relationship
1 AU = 149,597,870,700 m ≈ 149.598 Gm ≈ 499 light-seconds ≈ 8.317 light-minutes.
Conversion Formula
To convert AU to km: multiply by 149,597,870.7. To convert AU to light-years: divide by 63,241.
Practical Applications
Spacecraft mission planning, expressing planetary orbit sizes, and solar system scale models.
Interesting Facts
Light takes about 8 minutes and 20 seconds to travel 1 AU. Mars is about 1.52 AU from the Sun, Jupiter about 5.2 AU.
Common Mistakes
Thinking the AU is the exact Earth-Sun distance — Earth's actual distance varies from ~147 to ~152 Gm over the year due to orbital eccentricity.
Educational Tips
AU makes the solar system manageable: Mercury ≈ 0.39 AU, Venus ≈ 0.72, Earth = 1, Mars ≈ 1.52, Jupiter ≈ 5.2, Saturn ≈ 9.5.