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What is a nanometer?

Used in semiconductor manufacturing and visible light wavelengths

Definition

The nanometer equals one billionth of a meter. Visible light spans 380–700 nm. Modern semiconductors are manufactured on 3–5 nm process nodes. Gold atom diameter is 0.29 nm. The nanometre is the natural scale for atomic physics and nano-engineering.

Common uses

  • Semiconductor process nodes (3 nm, 5 nm, 7 nm chips)
  • Wavelengths of visible light and laser systems
  • Nanotechnology and molecular biology

🌍 Real-world scale

Visible light is 380–700 nm. Apple's A17 Pro chip uses a 3 nm process. The DNA double helix is 2 nm wide.

Convert from nanometers

14 conversions
Nanometer to Meter1 nm = 1.0000e-9 mNanometer to Kilometer1 nm = 1.0000e-12 kmNanometer to Centimeter1 nm = 1.0000e-7 cmNanometer to Millimeter1 nm = 1.0000e-6 mmNanometer to Mile1 nm = 6.2137e-13 miNanometer to Yard1 nm = 1.0936e-9 ydNanometer to Foot1 nm = 3.2808e-9 ftNanometer to Inch1 nm = 3.9370e-8 inNanometer to Nautical Mile1 nm = 5.3996e-13 nmiNanometer to Micrometer1 nm = 0.001 µmNanometer to Light Year1 nm = 1.0570e-25 lyNanometer to Furlong1 nm = 4.9710e-12 furNanometer to Fathom1 nm = 5.4681e-10 ftmNanometer to Angstrom1 nm = 10 Å

Convert to nanometers

14 conversions
Meter to Nanometer1 m = 1,000,000,000 nmKilometer to Nanometer1 km = 1,000,000,000,000 nmCentimeter to Nanometer1 cm = 10,000,000 nmMillimeter to Nanometer1 mm = 1,000,000 nmMile to Nanometer1 mi = 1,609,344,000,000 nmYard to Nanometer1 yd = 914,400,000 nmFoot to Nanometer1 ft = 304,800,000 nmInch to Nanometer1 in = 25,400,000 nmNautical Mile to Nanometer1 nmi = 1,852,000,000,000 nmMicrometer to Nanometer1 µm = 1,000 nmLight Year to Nanometer1 ly = 9.4607e24 nmFurlong to Nanometer1 fur = 201,168,000,000 nmFathom to Nanometer1 ftm = 1,828,800,000 nmAngstrom to Nanometer1 Å = 0.1 nm

Tips

  • 1 nm = 10 Ångströms = 0.001 µm. Chemists often prefer Ångströms for bond lengths.
  • Chip "5 nm" is a marketing term — the actual feature size differs by manufacturer.
  • Red light is 700 nm; violet is 380 nm; UV is below 380 nm.

Common mistakes

  • Assuming "3 nm" describes a single transistor width — it is a process-node name.
  • Confusing nm (length) with nM (nanomolar concentration).
  • Using nm for anything visible to the naked eye — switch to µm or mm.

FAQ about the nanometer

What is a nanometer?
The nanometer equals one billionth of a meter. Visible light spans 380–700 nm. Modern semiconductors are manufactured on 3–5 nm process nodes. Gold atom diameter is 0.29 nm. The nanometre is the natural scale for atomic physics and nano-engineering.
Where is the nanometer used?
The nanometer is commonly used for: Semiconductor process nodes (3 nm, 5 nm, 7 nm chips); Wavelengths of visible light and laser systems; Nanotechnology and molecular biology.
What is an example of a nanometer in real life?
Visible light is 380–700 nm. Apple's A17 Pro chip uses a 3 nm process. The DNA double helix is 2 nm wide.
What category does the nanometer belong to?
The nanometer is a unit of length, part of the 15-unit length category on UnitConv.
How accurate are nanometer conversions?
All conversion factors follow NIST and BIPM international standards to 8 significant figures — the highest practical accuracy.
Explore all 15 length units and their conversions.📏 Length hub →