Feet to Nautical Miles
Convert feet (ft) to nautical miles (nmi). Both measure distance and dimension, and the conversion comes up in construction, navigation, sports work.
The Formula
``
nautical miles = feet × 0.000164578833693
feet = nautical miles × 6076.11548556
`
One foot is 1.6458e-4 nautical miles, and one nautical mile is 6,076.12 feet.
Conversion Table
| Feet | Nautical Miles |
|---|---|
| 1 ft | 1.6458e-4 nmi |
| 2 ft | 3.2916e-4 nmi |
| 5 ft | 8.2289e-4 nmi |
| 10 ft | 0.001646 nmi |
| 25 ft | 0.004114 nmi |
| 50 ft | 0.008229 nmi |
| 100 ft | 0.016458 nmi |
| 500 ft | 0.082289 nmi |
| 1,000 ft | 0.164579 nmi |
The Other Direction
| Nautical Miles | Feet |
|---|---|
| 1 nmi | 6,076.12 ft |
| 2 nmi | 12,152.23 ft |
| 5 nmi | 30,380.58 ft |
| 10 nmi | 60,761.15 ft |
| 25 nmi | 151,902.89 ft |
| 50 nmi | 303,805.77 ft |
| 100 nmi | 607,611.55 ft |
| 500 nmi | 3,038,057.74 ft |
| 1,000 nmi | 6,076,115.49 ft |
What Each Unit Is
Feet (ft) — exactly 0.3048 metres, or one third of a yard. A human foot, standardised across centuries of conflicting local definitions.
Nautical Miles (nmi) — exactly 1,852 metres. One minute of latitude along a meridian, which is why it is the unit of sea and air navigation.
A Sense of Scale
A ceiling is 8–9 ft- Aviation altitude is always in feet
- A door is about 6.7 ft
- One knot is one nautical mile per hour
- A nautical mile is about 15% longer than a statute mile
Precision
The factor 0.000164578833693 is rounded. For engineering work carry more digits than the table above, and round only at the end — rounding at each step compounds.
Watch Out For
- A nautical mile is not a statute mile. Mixing them up understates a distance by roughly 15%.
In Code
`javascript
const footToNauticalMile = (value) => value * 0.000164578833693;
``
Where This Conversion Comes Up
- Construction
- Navigation
- Sports
- Sewing
- Mapping
How Many Decimals Do You Need?
Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 ft with the factor truncated at each decimal place:
| Decimals kept | Factor | 137 ft becomes | Error |
|---|---|---|---|
| 0 | 0 | 0 | 100.0000% |
| 1 | 0 | 0 | 100.0000% |
| 2 | 0 | 0 | 100.0000% |
| 3 | 0 | 0 | 100.0000% |
| 4 | 0.0002 | 0.0274 | 21.5223% |
The right number of significant figures is set by your input, not by the converter. If you measured feet to three significant figures, the answer in nautical miles is only good to three — writing more digits claims precision the measurement never had.