Nautical Mile to Fathom Converter
Convert Nautical Mile (nmi) to Fathom (ftm) instantly. 1 nmi = 1,012.685914 ftm.
Length Converter
31 units available
1 nmi = 1,012.685914 ftm
Formula:
ftm = nmi × 1,012.6859142607With your value: 1 nmi = 1,012.68591426 ftm
How big is that?
Everyday references on a logarithmic scale, all expressed in nautical mile so you can sanity-check the result.
Other Nautical Mile to Fathom conversions
Nautical Mile to Fathom Conversion Table
| Nautical Mile (nmi) | Fathom (ftm) |
|---|---|
| 0.5 | 506.342957 |
| 1 | 1,012.685914 |
| 2 | 2,025.371829 |
| 5 | 5,063.429571 |
| 10 | 10,126.859143 |
| 15 | 15,190.288714 |
| 20 | 20,253.718285 |
| 25 | 25,317.147857 |
| 50 | 50,634.295713 |
| 100 | 101,268.591426 |
| 250 | 253,171.478565 |
| 500 | 506,342.95713 |
| 1000 | 1,012,685.914261 |
Fathom to Nautical Mile Conversion Table
| Fathom (ftm) | Nautical Mile (nmi) |
|---|---|
| 0.5 | 0.000494 |
| 1 | 0.000987 |
| 2 | 0.001975 |
| 5 | 0.004937 |
| 10 | 0.009875 |
| 15 | 0.014812 |
| 20 | 0.019749 |
| 25 | 0.024687 |
| 50 | 0.049374 |
| 100 | 0.098747 |
| 250 | 0.246868 |
| 500 | 0.493737 |
| 1000 | 0.987473 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Nautical Mile (nmi)
Length
1 international nautical mile = 1852 m exactly, adopted by the First International Extraordinary Hydrographic Conference (1929).
Source: Units accepted for use with the SI, SI Brochure Table 8
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Fathom (ftm)
Length
Traceable to the metre, defined by fixing the speed of light in vacuum at 299 792 458 m/s. Imperial lengths derive from the 1959 international yard (0.9144 m exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Nautical Mile to Fathom
To convert from Nautical Mile (nmi) to Fathom (ftm), multiply the value by 1,012.6859142607.
Formula: ftm = nmi × 1,012.6859142607
Reverse: nmi = ftm × 0.000987473
Step-by-Step Example
- Start with your value in Nautical Mile. For example: 5 nmi
- Multiply by the conversion factor: 5 x 1,012.6859142607
- The result is: 5,063.429571 ftm
About Nautical Mile
The nautical mile equals 1,852 meters and is used primarily in aviation and maritime navigation.
Fun Fact: One nautical mile corresponds to one minute of latitude on the Earth's surface.
Common uses: navigation, aviation, maritime.
About Fathom
The fathom equals 6 feet (1.8288 m) and is the traditional unit for water depth on nautical charts.
Fun Fact: The word comes from the Old English "fæðm", the span of a man's outstretched arms.
Common uses: sounding depth, nautical charts, diving.
Frequently Asked Questions
How many Fathom are in 1 Nautical Mile?
There are exactly 1,012.6859142607 Fathom in 1 Nautical Mile. This means the conversion factor from Nautical Mile to Fathom is 1,012.6859142607.
What is the formula to convert Nautical Mile to Fathom?
The formula to convert Nautical Mile to Fathom is: ftm = nmi × 1,012.6859142607. For example, to convert 10 Nautical Mile to Fathom, you would multiply 10 by 1,012.6859142607.
What is a Nautical Mile?
The nautical mile equals 1,852 meters and is used primarily in aviation and maritime navigation.
What is a Fathom?
The fathom equals 6 feet (1.8288 m) and is the traditional unit for water depth on nautical charts.
What are the common uses of Nautical Mile?
The Nautical Mile is commonly used in navigation, aviation, maritime.
Related Length Conversions
Cite this page
UnitConvertLab. (2026). Nautical Mile to Fathom converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/nautical_mile-to-fathom