# Angstroms to Centimeters (A to cm)

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

**1 A = 1.0E-8 cm**

One ångström equals exactly 10-8 centimeters, or 0.00000001 cm. This conversion bridges the atomic scale used in crystallography and spectroscopy with the everyday centimeter scale. It's needed when translating molecular dimensions into units that relate to macroscopic measurements.

## Formula

Convert Angstroms to Centimeters

## Conversion Table

| Angstroms (A) | Centimeters (cm) |
|---|---|
| 1 A | 9.99999999999E-9 cm |
| 5 A | 4.999999999999E-8 cm |
| 10 A | 9.999999999999E-8 cm |
| 50 A | 4.9999999999999E-7 cm |
| 100 A | 9.9999999999999E-7 cm |
| 500 A | 5.0E-6 cm |
| 1000 A | 1.0E-5 cm |
| 5000 A | 5.0E-5 cm |
| 10000 A | 0.0001 cm |
| 100000 A | 0.001 cm |
| 1000000 A | 0.01 cm |
| 10000000 A | 0.1 cm |
| 100000000 A | 1 cm |
| 1000000000 A | 10 cm |

## Units

### Angstrom (A)

One ten-billionth of a meter (0.1 nanometers). Named after Anders Jonas Angstrom. Used in crystallography, spectroscopy, and atomic physics.

### Centimeter (cm)

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

## Background

Visible light wavelengths of 3,800-7,500 Å correspond to 0.000038-0.000075 cm. A DNA helix diameter of 20 Å is 0.000002 cm. X-ray wavelengths used in crystallography (0.5-2 Å) are 5×10-9 to 2×10-8 cm. While these numbers are tiny, the conversion is routine in spectroscopy labs that work with both ångströms and centimeters.

## Good to Know

The CGS (centimeter-gram-second) system historically used centimeters as its base length unit, making this conversion particularly relevant in older physics literature. Modern SI prefers nanometers and picometers over ångströms.

## FAQ

### How many centimeters is 1 ångström?

One ångström equals exactly 10-8 centimeters (0.00000001 cm). To convert, divide the ångström value by 108 (100 million).

### How do I convert ångströms to centimeters?

Divide ångströms by 100,000,000 (108), or move the decimal point 8 places to the left. For example, 5,000 Å = 0.00005 cm = 5 × 10-5 cm.

### Why do scientists use ångströms instead of centimeters for atoms?

Atomic dimensions naturally fall in the 1-10 Å range, giving clean single-digit numbers. In centimeters, the same dimensions would be unwieldy numbers like 0.00000015 cm. The ångström makes atomic-scale work more readable.

## Non-Frequently Asked Questions

### If atoms are measured in angstroms, is a centimeter just a bunch of atoms hanging out?

Roughly yes. A centimeter contains about 100 million angstroms (108). That is about 40 million carbon atoms side by side. So a centimeter is indeed a very large social gathering of atoms.

### Can I feel a single angstrom with my finger?

Your fingertip's touch sensitivity is about 0.1 mm, which is 1 million angstroms. You would need to shrink your sensory resolution by a factor of a million. Even then, an atom would feel like nothing because atoms do not have surfaces the way we understand 'touching.'

### Is an angstrom just a centimeter that went on a diet?

A strict diet. An angstrom is 10-8 centimeters - one hundred-millionth of a centimeter. If a centimeter lost that much weight, there would be essentially nothing left. This is less a diet and more a disappearing act.

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## See Also

- [Centimeters to Angstroms](https://www.unitconvertercalculator.com/length/centimeters-to-angstroms/)