Length and Area
ftmtonmi
Convert fathoms (ftm) to nautical miles (nmi).
Factor1 ftm = 0.000987473 nmi
Converter
ftm
Accepts numbers or expressions, e.g. 150 + 14.7
Result
nmi
Rendered to 6 significant figures.
Formula
Formula
nmi = ftm × 0.000987473
Multiply any value in fathoms by 0.000987473 to obtain the value in nautical miles.
Worked example
Convert 1000 ftm to nmi.
- 01Start with 1000 ftm.
- 02Multiply by the conversion factor: 1000 × 0.000987473 = 0.987473 nmi.
Result1000 ftm = 0.987473 nmi
Conversion table
| ftm | nmi |
|---|---|
| 1 | 0.00098747 |
| 2 | 0.0019749 |
| 5 | 0.0049374 |
| 10 | 0.0098747 |
| 20 | 0.019749 |
| 50 | 0.049374 |
| 100 | 0.098747 |
| 200 | 0.19749 |
| 500 | 0.49374 |
| 1000 | 0.98747 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from ftm to nmi?
1 ftm equals 0.000987473 nmi. To convert, multiply the value in fathoms by 0.000987473.
How do I convert 1 ftm to nmi?
1 ftm = 0.000987473 nmi. For any value, multiply by 0.000987473.
How do I convert nmi back to ftm?
Divide by the same factor — or equivalently, multiply by 1012.686. So 1 nmi = 1012.69 ftm.
When would I need to convert fathom to nautical mile?
Length conversions appear in piping, layout, and mechanical drawings — particularly when reconciling imperial fittings or instrument lengths with metric plant drawings.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).