Convert Centimetre to Astronomical Unit
1 centimetre = 6.6846e-14 astronomical unit (AU). For example, 10 centimetre = 6.6846e-13 astronomical unit and 100 centimetre = 6.6846e-12 astronomical unit. Type any value below to convert centimetre to astronomical unit both ways — it runs entirely in your browser.
Centimetre to Astronomical Unit conversion formula
To convert centimetre to astronomical unit, multiply by 6.6846e-14:
astronomical unit = centimetre × 6.6846e-14
Going the other way, 1 astronomical unit = 1.496e+13 centimetre, so
centimetre = astronomical unit × 1.496e+13.
Centimetre to Astronomical Unit — worked examples
| Centimetre | Astronomical Unit |
|---|---|
| 1 cm | 6.6846e-14 AU |
| 2 cm | 1.3369e-13 AU |
| 3 cm | 2.0054e-13 AU |
| 5 cm | 3.3423e-13 AU |
| 10 cm | 6.6846e-13 AU |
| 25 cm | 1.6711e-12 AU |
| 50 cm | 3.3423e-12 AU |
| 100 cm | 6.6846e-12 AU |
Centimetre ↔ Astronomical Unit reference table
| Centimetre → Astronomical Unit | Astronomical Unit → Centimetre |
|---|---|
| 1 cm = 6.6846e-14 AU | 1 AU = 1.496e+13 cm |
| 2 cm = 1.3369e-13 AU | 2 AU = 2.992e+13 cm |
| 5 cm = 3.3423e-13 AU | 5 AU = 7.4799e+13 cm |
| 10 cm = 6.6846e-13 AU | 10 AU = 1.496e+14 cm |
| 20 cm = 1.3369e-12 AU | 20 AU = 2.992e+14 cm |
| 50 cm = 3.3423e-12 AU | 50 AU = 7.4799e+14 cm |
| 100 cm = 6.6846e-12 AU | 100 AU = 1.496e+15 cm |
| 250 cm = 1.6711e-11 AU | 250 AU = 3.7399e+15 cm |
| 500 cm = 3.3423e-11 AU | 500 AU = 7.4799e+15 cm |
| 1000 cm = 6.6846e-11 AU | 1000 AU = 1.496e+16 cm |
About centimetre and astronomical unit
Centimetre: A centimetre is one-hundredth of a metre — the everyday small-length metric unit.
Astronomical Unit: An astronomical unit is the average Earth–Sun distance, defined as exactly 149,597,870,700 m.
The metric units (km, m, cm, mm, µm) are exact by definition, and the imperial units (mile, yard, foot, inch, nautical mile) use their exact international values. Traditional units (hand, span, finger, cubit, rod/pole, link, rope, ken, league) are given at their commonly accepted standard sizes — historical local values sometimes differed, so confirm against a primary source before relying on them for legal or historical work.
Frequently asked questions
- How many astronomical unit are in 1 centimetre?
- 1 centimetre = 6.6846e-14 astronomical unit (AU).
- How do I convert centimetre to astronomical unit?
- Multiply the number of centimetre by 6.6846e-14. For example, 10 centimetre = 10 × 6.6846e-14 = 6.6846e-13 astronomical unit.
- How many centimetre are in 1 astronomical unit?
- 1 astronomical unit = 1.496e+13 centimetre.
- Which is bigger, centimetre or astronomical unit?
- 1 astronomical unit equals 1.496e+13 centimetre, so a astronomical unit is the larger unit.