Convert Nanometer to Fathom
Convert nanometers to fathoms instantly. 1 nanometer = 5.468066e-10 fathom — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Fathom to Nanometer converter for the reverse conversion.
Units explained
Nanometer
A nanometer is a metric unit of length equal to one billionth of a meter (1×10⁻⁹ m). It is the standard unit for measuring atomic and molecular dimensions and is widely used in physics, chemistry, and electronics.
Defined using the SI prefix nano- (from Greek nanos, "dwarf") to denote one-billionth, adopted by the General Conference on Weights and Measures (CGPM) in 1960.
Nanometers are used to measure wavelengths of visible light (400–700 nm), semiconductor transistor sizes (currently 3–5 nm process nodes), DNA double helix width (2 nm), and atomic radii. The 2019 SI redefinition fixed the meter to the speed of light, making nanometer definitions exact to atomic precision.
SI prefix nano- adopted by the CGPM in 1960; nanometer became the standard unit for nanotechnology and optical wavelengths during the late 20th century.
Fathom
A fathom is an Imperial unit of length equal to 6 feet or exactly 1.8288 meters. It is used almost exclusively for measuring water depth in maritime contexts.
The fathom derives from the Old English word fæthm, meaning "the embracing arms" — the distance between the fingertips of a person's outstretched arms. Standardized at 6 feet in English maritime tradition.
Fathoms are used in nautical depth charts, scuba diving, oceanography, and maritime literature. Despite metrication efforts, fathoms remain common in English-language nautical charts and recreational diving.
Old English origin (predating 1066); standardized at 6 feet by English maritime tradition; fixed at 1.8288 m exactly via the 1959 International Yard and Pound Agreement.
Nanometer to Fathom conversion formula
The relationship between nanometers and fathoms:
To convert nanometers to fathoms, multiply the value in nanometers by 5.468066e-10. To reverse, multiply fathoms by 1.8288e+9.
How to use this converter
Type a value into the calculator. The result in fathoms updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Fathom to Nanometer converter for the reverse direction.
Step-by-step: convert nanometers to fathoms
- Write down the value in nanometers (nm).
- Multiply that value by the factor 5.468066e-10.
- The product is the equivalent value in fathoms (ftm).
- To reverse, multiply the fathom value by 1.8288e+9.
Worked examples
Example 1 — Convert 1 nm to ftm:
1 × 5.468066e-10 = 5.468066e-10 ftm
Example 2 — Convert 100 nm to ftm:
100 × 5.468066e-10 = 5.468066e-8 ftm
Real-world example — Bridging nine orders of magnitude
500 million nanometers equals a value comfortably in the human-scale fathoms range. Physics problems that span this gap are common when comparing the wavelength of light to the path length of an experiment.
5e+8 nm × 5.468066e-10 = 0.2734033246 ftm
Real-world example — From sub-micron to human scale
One billion nanometers equals one fathom — the conversion that drives home the gulf between atomic-scale features and everyday objects in physics curricula.
1e+9 nm × 5.468066e-10 = 0.5468066492 ftm
Nanometer to Fathom conversion table
Standard reference values for converting nanometers to fathoms:
| Nanometer [nm] | Fathom [ftm] |
|---|---|
| 0.01 | 5.468066e-12 |
| 0.1 | 5.468066e-11 |
| 1 | 5.468066e-10 |
| 2 | 1.093613e-9 |
| 3 | 1.64042e-9 |
| 4 | 2.187227e-9 |
| 5 | 2.734033e-9 |
| 10 | 5.468066e-9 |
| 20 | 1.093613e-8 |
| 30 | 1.64042e-8 |
| 40 | 2.187227e-8 |
| 50 | 2.734033e-8 |
| 100 | 5.468066e-8 |
| 500 | 2.734033e-7 |
| 1000 | 5.468066e-7 |
Frequently asked questions
How many fathoms is 1 nanometer?
How do I convert nanometers to fathoms?
How do I convert fathoms back to nanometers?
How many fathoms is 100 nanometers?
Popular length unit conversions
Convert Nanometer to other length units
Show all Nanometer conversions
Metric / SI (17 units)
Imperial / US Customary (7 units)
Nautical (1 units)
Sources & references
Conversion factor (1 nm = 5.468066e-10 ftm) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.