nm to m Conversion Calculator — Nanometres to Metres
Enter a length in nanometres (nm) or metres (m) and convert it in both directions. The calculator also shows micrometres, millimetres, centimetres, and ångströms, and places wavelengths up to 2000 nm on a visible-light scale.
Conversion direction
nm
1 nm = 1 × 10⁻⁹ m • 1 m = 1 × 10⁹ nm
- 1
Scale: 1 nm = 10⁻⁹ m
0.000000001The nanometre is one billionth of a metre by SI definition. - 2
Multiply nm by 10⁻⁹
550 × 10⁻⁹ = 0.000000550000
How does this calculator work?
1 nm = 10⁻⁹ m; 1 m = 10⁹ nm. To convert nm → m, divide by 10⁹. To convert m → nm, multiply by 10⁹. Nanometres are the standard unit for visible-light wavelengths (380–700 nm), atomic sizes, and chip feature dimensions. The calculator also shows µm, mm, cm, and Å equivalents.
Formula
How this is calculated
The nanometre (nm) is a unit of length equal to one billionth of a metre: 1 nm = 10⁻⁹ m. It sits between the micrometre (10⁻⁶ m) and the picometre (10⁻¹² m) on the SI length scale, making it the natural unit for phenomena at the atomic and molecular level — visible light wavelengths (380–700 nm), semiconductor feature sizes (2–10 nm for modern transistor gate lengths), protein dimensions (~2–10 nm), and virus diameters (20–300 nm).
Converting nm to m is a simple power-of-ten shift: divide by 10⁹ (or multiply by 10⁻⁹). Going the other way, multiply by 10⁹. The ångström (Å = 10⁻¹⁰ m = 0.1 nm) is a non-SI unit still common in crystallography and atomic physics; 1 nm = 10 Å. The micrometre (µm = 10⁻⁶ m = 1000 nm) is used in infrared optics where wavelengths are more conveniently expressed as a few micrometres than thousands of nanometres.
For wavelengths in the 0–2000 nm range, the number line below the results marks the visible-light band (380–700 nm) and places the entered value in context. This is useful when working with laser wavelengths, LED specifications, or optical bandpass-filter cutoffs.
Frequently asked questions
Divide by 1,000,000,000 (10⁹), or equivalently multiply by 10⁻⁹. Example: 550 nm = 550 × 10⁻⁹ m = 5.5 × 10⁻⁷ m. Scientific notation is clearest for this scale.
Multiply by 10⁹. Example: 1 m = 1 × 10⁹ nm; 5.5 × 10⁻⁷ m = 550 nm. This reverse conversion is useful when a wavelength is given in metres (as in some physics equations) and you need the nm value for an optical component spec sheet.
Visible light spans approximately 380–700 nm (violet to deep red), equivalent to 3.8 × 10⁻⁷ m to 7.0 × 10⁻⁷ m. Green light peaks near 550 nm (5.5 × 10⁻⁷ m). Below 380 nm is UV; above 700 nm is near-infrared.
Also known as
TG we-Calculate Editorial Team. (2026). nm to m Conversion Calculator — Nanometres to Metres [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/nm-to-m-conversion-calculator
TG we-Calculate Editorial Team. "nm to m Conversion Calculator — Nanometres to Metres." TG we-Calculate. 2026. https://we-calculate.com/calculator/nm-to-m-conversion-calculator.
TG we-Calculate Editorial Team, "nm to m Conversion Calculator — Nanometres to Metres," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/nm-to-m-conversion-calculator
@misc{wecalculate_nm_to_m_conversion_calculator, title = {nm to m Conversion Calculator — Nanometres to Metres}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/nm-to-m-conversion-calculator}}, year = {2026}, note = {TG we-Calculate} }
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