---
title: "Centimeters to Astronomical units — cm to AU converter"
description: "1 centimeter = 6.685 × 10^-14 astronomical units. Conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/cm-to-astronomical-units/
site: "At One Place"
---

# Centimeters to astronomical units

**1 centimeter in astronomical units: 1 cm = 6.685 × 10^-14 AU**

AU = cm × 6.684587122 × 10^-14

To convert centimeters to astronomical units, multiply by 6.684587122 × 10^-14. The table below gives the values people look up most often, and the converter works for any number.

## Centimeters to astronomical units table

*Common centimeter values converted to astronomical units.*

| Centimeters | Astronomical units |
| --- | --- |
| 1 cm | 6.685 × 10^-14 |
| 2 cm | 1.337 × 10^-13 |
| 3 cm | 2.005 × 10^-13 |
| 4 cm | 2.674 × 10^-13 |
| 5 cm | 3.342 × 10^-13 |
| 10 cm | 6.685 × 10^-13 |
| 15 cm | 1.003 × 10^-12 |
| 20 cm | 1.337 × 10^-12 |
| 25 cm | 1.671 × 10^-12 |
| 30 cm | 2.005 × 10^-12 |
| 40 cm | 2.674 × 10^-12 |
| 50 cm | 3.342 × 10^-12 |
| 75 cm | 5.013 × 10^-12 |
| 100 cm | 6.685 × 10^-12 |
| 250 cm | 1.671 × 10^-11 |
| 500 cm | 3.342 × 10^-11 |
| 1,000 cm | 6.685 × 10^-11 |

## How the conversion works

The relationship is AU = cm × 6.684587122 × 10^-14. Both units measure length, so the conversion is a fixed factor that never changes.

## Common questions

### How many astronomical units are in one centimeter?

One centimeter equals 6.685 × 10^-14 astronomical units. AU = cm × 6.684587122 × 10^-14.

### How do you convert centimeters to astronomical units?

Use AU = cm × 6.684587122 × 10^-14. So 10 cm is 6.685 × 10^-13 AU.

### How many centimeters are in one astronomical unit?

One astronomical unit equals 14,959,787,000,000 centimeters, which is the reverse of the conversion above.

## Related pages

- [Astronomical units to Centimeters](https://atoneplace.net/convert/astronomical-units-to-cm/)
- [Centimeters to Meters](https://atoneplace.net/convert/cm-to-meters/)
- [Centimeters to Kilometers](https://atoneplace.net/convert/cm-to-km/)
- [Centimeters to Millimeters](https://atoneplace.net/convert/cm-to-mm/)
- [Centimeters to Miles](https://atoneplace.net/convert/cm-to-miles/)
- [Centimeters to Yards](https://atoneplace.net/convert/cm-to-yards/)
- [Centimeters to Feet](https://atoneplace.net/convert/cm-to-feet/)
- [Centimeters to Inches](https://atoneplace.net/convert/cm-to-inches/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)