# Centimeters to Astronomical Units (cm to au)

Source: https://www.unitconvertercalculator.com/length/centimeters-to-astronomical-units/

**1 cm = 6.6845871222684E-14 au**

One centimeter equals approximately 6.685 x 10-14 astronomical units. The Earth-Sun distance (1 AU) is about 1.496 x 1013 cm (about 15 trillion centimeters). The centimeter measures everyday objects; the AU measures planetary orbits.

## Formula

Convert Centimeters to Astronomical Units

## Conversion Table

| Centimeters (cm) | Astronomical Units (au) |
|---|---|
| 100000000000000 cm | 6.6845871222684 au |
| 200000000000000 cm | 13.369174244537 au |
| 500000000000000 cm | 33.422935611342 au |
| 1000000000000000 cm | 66.845871222684 au |
| 2500000000000000 cm | 167.11467805671 au |
| 5000000000000000 cm | 334.22935611342 au |
| 10000000000000000 cm | 668.45871222684 au |
| 50000000000000000 cm | 3342.2935611342 au |
| 100000000000000000 cm | 6684.5871222684 au |

## Units

### Centimeter (cm)

A metric unit of length equal to one hundredth of a meter. Commonly used for body height, clothing sizes, and everyday measurements.

### Astronomical Unit (au)

Exactly 149,597,870,700 meters by IAU 2012 definition. Roughly the average distance from the Earth to the Sun. Used for distances within our solar system.

## Background

The Earth-Sun distance is about 14.96 trillion centimeters. Mount Everest at 884,800 cm (8,848 m) is only 5.91 x 10-9 AU tall. Even stacking Earth's diameter (1.275 billion cm) gives only 0.0000852 AU. These comparisons show how thin Earth is relative to its orbit.

## Good to Know

A centimeter is something you can feel between your fingers. An AU is a distance you cannot comprehend. The 14-order-of-magnitude gap between them represents the difference between touch and imagination.

## FAQ

### How many AU is 1 centimeter?

One centimeter equals approximately 6.685 x 10-14 AU, about 14 orders of magnitude smaller than an AU.

### How many centimeters are in 1 AU?

One AU contains approximately 1.496 x 1013 cm (about 14.96 trillion centimeters).

### Is this conversion practical?

No. Centimeters measure small everyday objects. AU measures solar system distances. These scales have no practical overlap.

## Non-Frequently Asked Questions

### If I stacked pennies to the Sun, how many would I need?

A US penny is about 0.15 cm thick. The Sun is about 1.496 x 1013 cm away. So roughly 100 trillion pennies, worth about 1 trillion dollars. The US national debt is cheaper.

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## See Also

- [Astronomical Units to Centimeters](https://www.unitconvertercalculator.com/length/astronomical-units-to-centimeters/)