General
Angstrom to nm Conversion Calculator
Convert between Angstrom (Å) and nanometers (nm) with precision. Essential for atomic and molecular scale measurements.
Reviewed by the calculator.uk.com Team · Last reviewed 1 June 2026 · Our methodology
Enter a value in either Angstrom or Nanometer to see the conversion
Related to Angstrom to nm Conversion Calculator
The Angstrom to Nanometer conversion calculator provides a simple and accurate way to convert between these two units of measurement commonly used in atomic and molecular scale measurements. The conversion is based on the fundamental relationship between these units:
Conversion Formula
1 Angstrom (Å) = 0.1 Nanometer (nm)
1 Nanometer (nm) = 10 Angstroms (Å)
This calculator automatically performs the conversion in both directions. When you enter a value in either the Angstrom or Nanometer field, it instantly calculates the equivalent value in the other unit using these precise conversion factors. The results are displayed with four decimal places to ensure accuracy in scientific calculations.
Both Angstroms (Å) and nanometers (nm) are units of length used primarily in science for measuring extremely small distances, particularly at the atomic and molecular level. Understanding their scale and common applications is crucial for scientific work.
Scale Reference
• 1 Angstrom = 10⁻¹⁰ meters
• 1 Nanometer = 10⁻⁹ meters
• Typical atom diameter: 1-5 Å
• DNA double helix width: ~20 Å or 2 nm
These units are essential in various scientific fields, including crystallography, molecular biology, and nanotechnology. The choice between using Angstroms or nanometers often depends on the specific scientific discipline and the scale of the measurements being made.
1. Why are Angstroms used instead of nanometers?
Angstroms are traditionally used in atomic and molecular physics because they provide a convenient scale for atomic dimensions. One Angstrom is approximately the diameter of a hydrogen atom, making it a natural unit for atomic-scale measurements.
2. Which unit is more commonly used in modern science?
Nanometers are more commonly used in modern scientific literature and are the SI-accepted unit. However, Angstroms are still widely used in specific fields like crystallography and atomic physics due to historical precedent and convenience.
3. How accurate is this conversion?
The conversion between Angstroms and nanometers is exact, as it is based on a defined relationship: 1 Å = 0.1 nm. This calculator provides results to four decimal places to ensure precision in scientific calculations.
4. Can these units be used interchangeably?
While both units measure the same physical quantity (length), they are typically used in different contexts. Nanometers are preferred in modern scientific literature and nanotechnology, while Angstroms are common in atomic physics and crystallography.
5. What is the scientific source for this calculator?
The angstrom is not an SI unit, but its relationship to the nanometer is fixed exactly at 1 angstrom equals 0.1 nanometers, since both are simply decimal multiples of the metre, whose modern definition is maintained by the International Bureau of Weights and Measures (BIPM). Crystallographers and atomic physicists still favor the angstrom because it sits close to typical atomic bond lengths, but the conversion itself is just arithmetic on metric prefixes.