Nm

SI Nanoscale Metrology & International BIPM Standards

The nanometer (symbol: nm) is an International System of Units (SI) measurement equal to one-billionth of a meter (10^-9 m):

• 1 nm: 10^-9 m = 0.001 μm = 10 = 1,000 pm = 10^-6 mm

Primary Nanoscale Physical Benchmarks

• 0.1 nm (1.0 ): Single hydrogen atom diameter

• 0.2 nm (2.0 ): Silicon crystal lattice atomic bond

• 2.0 nm: Advanced GAAFET nanosheet semiconductor gate node

• 2.5 nm: DNA double-helix spiral width

• 405 nm: Violet diode laser wavelength

• 532 nm: Green DPSS laser wavelength

• 632.8 nm: Helium-Neon red gas laser wavelength

• 1,064 nm: Nd:YAG infrared industrial cutting laser

Equations

• Meters (m) = nm × 10^-9

• Microns (μm) = nm × 10^-3

• Angstroms () = nm × 10

How to Use This Calculator

Enter your Nanometer Dimension / Wavelength (nm) (e.g. 532.0 in nm) and Semiconductor & Optical Benchmark — choose from Custom Nanometer Value, 0.2 nm (2.0 Å / Silicon Atom Diameter), 2.5 nm (25 Å / DNA Double Helix Width). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Conversion factors used in this calculator:

1 nm = 10

Worked Example

A 532 nm green laser pointer emits photons with a wavelength of exactly 0.532 microns (5,320 Angstroms or 5.32 × 10^-7 meters).

Understanding Your Result

Unit conversions are exact by definition within a given measurement system (e.g., 1 km = exactly 1,000 m). Cross-system conversions (metric to imperial) use defined exchange factors: 1 inch = exactly 2.54 cm; 1 pound = 0.45359237 kg. Round your converted result to match the precision of your original measurement — expressing more decimal places than your input justifies implies false accuracy. For regulatory, legal, or safety-critical applications, verify which measurement system is required by the applicable standard.