Mil/Thou to Nautical Mile Converter
Convert Mil/Thou (mil) to Nautical Mile (nmi) instantly. 1 mil = 1.371490e-8 nmi.
Length Converter
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1 mil = 1.371490e-8 nmi
Formula:
nmi = mil × 1.371490e-8With your value: 1 mil = 1.371490e-8 nmi
How big is that?
Everyday references on a logarithmic scale, all expressed in mil/thou so you can sanity-check the result.
Other Mil/Thou to Nautical Mile conversions
Mil/Thou to Nautical Mile Conversion Table
| Mil/Thou (mil) | Nautical Mile (nmi) |
|---|---|
| 0.5 | 6.857451e-9 |
| 1 | 1.371490e-8 |
| 2 | 2.742981e-8 |
| 5 | 6.857451e-8 |
| 10 | 1.371490e-7 |
| 15 | 2.057235e-7 |
| 20 | 2.742981e-7 |
| 25 | 3.428726e-7 |
| 50 | 6.857451e-7 |
| 100 | 1.371490e-6 |
| 250 | 3.428726e-6 |
| 500 | 6.857451e-6 |
| 1000 | 1.371490e-5 |
Nautical Mile to Mil/Thou Conversion Table
| Nautical Mile (nmi) | Mil/Thou (mil) |
|---|---|
| 0.5 | 36,456,692.913386 |
| 1 | 72,913,385.826772 |
| 2 | 145,826,771.653543 |
| 5 | 364,566,929.133858 |
| 10 | 729,133,858.267717 |
| 15 | 1,093,700,787.401575 |
| 20 | 1,458,267,716.535433 |
| 25 | 1,822,834,645.669291 |
| 50 | 3,645,669,291.338583 |
| 100 | 7,291,338,582.677165 |
| 250 | 18,228,346,456.692913 |
| 500 | 36,456,692,913.385826 |
| 1000 | 72,913,385,826.77165 |
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.
Mil/Thou (mil)
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
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
How to Convert Mil/Thou to Nautical Mile
To convert from Mil/Thou (mil) to Nautical Mile (nmi), multiply the value by 1.371490e-8.
Formula: nmi = mil × 1.371490e-8
Reverse: mil = nmi × 72,913,385.82677165
Step-by-Step Example
- Start with your value in Mil/Thou. For example: 5 mil
- Multiply by the conversion factor: 5 x 1.371490e-8
- The result is: 6.857451e-8 nmi
About Mil/Thou
A mil (or thou) is one thousandth of an inch, 25.4 micrometres. US manufacturing uses it for sheet, film and coating thickness.
Common uses: plastic film, PCB traces, coating thickness.
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.
Frequently Asked Questions
How many Nautical Mile are in 1 Mil/Thou?
There are exactly 1.371490e-8 Nautical Mile in 1 Mil/Thou. This means the conversion factor from Mil/Thou to Nautical Mile is 1.371490e-8.
What is the formula to convert Mil/Thou to Nautical Mile?
The formula to convert Mil/Thou to Nautical Mile is: nmi = mil × 1.371490e-8. For example, to convert 10 Mil/Thou to Nautical Mile, you would multiply 10 by 1.371490e-8.
What is a Mil/Thou?
A mil (or thou) is one thousandth of an inch, 25.4 micrometres. US manufacturing uses it for sheet, film and coating thickness.
What is a Nautical Mile?
The nautical mile equals 1,852 meters and is used primarily in aviation and maritime navigation.
What are the common uses of Mil/Thou?
The Mil/Thou is commonly used in plastic film, PCB traces, coating thickness.
Related Length Conversions
Cite this page
UnitConvertLab. (2026). Mil/Thou to Nautical Mile converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/mil-to-nautical_mile