A foot is exactly 0.3048 meters.
Feet to Nautical miles Converter — ft to nmi
Convert Foot (ft) to Nautical mile (nmi) using the exact conversion factor (1 foot = 0.0001645788 nautical mile). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Feet to Nautical miles converter
Converter
Length Converter
Convert SI, imperial, US customary, astronomical, scientific, and historical length units.
Context values
Some unit families need one extra value for a physically accurate result.
A nautical mile is exactly 1,852 meters.
Result = input x 0.3048 / 1852.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Feet to Nautical miles
Foot and Nautical mile both measure length. Foot is typically associated with united States (height, construction, aviation altitude), while Nautical mile is typically associated with used internationally in maritime navigation and aviation..
Formula
nautical miles = feet × 0.000164578833693
This factor comes from each unit's defined relationship to the category's base unit: 1 foot equals 0.3048 base units, and 1 nautical mile equals 1852 base units, so dividing one by the other gives the direct foot-to-nautical mile factor of 0.000164578833693.
Simple example
1 ft × 0.0001645788337 = 0.0001645788 nmi
1 foot = 0.0001645788 nautical miles.
Real-world example
10 ft × 0.0001645788337 = 0.0016457883 nmi
10 feet = 0.0016457883 nautical miles.
Conversion table
| Foot (ft) | Nautical mile (nmi) |
|---|---|
| 1 ft | 0.0001645788 nmi |
| 5 ft | 0.0008228942 nmi |
| 10 ft | 0.0016457883 nmi |
| 21.0975 ft | 0.0034722019 nmi |
| 42.195 ft | 0.0069444039 nmi |
| 100 ft | 0.0164578834 nmi |
Reverse conversion: Nautical mile to Foot
0.0001645788 nmi × 6076.115486 = 0.9999997953 ft
0.0001645788 nautical miles = 0.9999997953 feet.
feet = nautical miles × 6076.11548556
For a page dedicated to this direction, see Nautical mile to Foot.
Foot vs. Nautical mile
| Aspect | Foot | Nautical mile |
|---|---|---|
| Family | US/imperial customary unit | Non-SI unit accepted for use with SI (maritime/aviation) |
| Typical use | Height measurement in the US and UK | Marine and aviation distance and navigation |
| Where it's used | United States (height, construction, aviation altitude) | Used internationally in maritime navigation and aviation. |
Understanding the Foot
Foot (ft) measures distance. The international foot is defined as exactly 0.3048 meters. It is classified as a US/imperial customary unit.
Where it's used: United States (height, construction, aviation altitude) United Kingdom (height, some construction contexts)
Uses of the Foot today
- Height measurement in the US and UK
- US construction and real estate (square footage)
- Aviation altitude worldwide (feet remain standard even in metric countries)
History of the Foot
The foot has ancient roots (Roman 'pes', various regional English feet), standardized into the modern English foot over centuries. The international foot (exactly 0.3048 m) was fixed by the 1959 International Yard and Pound Agreement, resolving small historical differences between US and UK measurements.
Historical origin. Foot was not the invention of a single named person; it developed through the process described above.
Understanding the Nautical mile
Nautical mile (nmi) measures distance. The international nautical mile is defined as exactly 1,852 meters, standardized in 1929. It is classified as a Non-SI unit accepted for use with SI (maritime/aviation).
Where it's used: Used internationally in maritime navigation and aviation.
Uses of the Nautical mile today
- Marine and aviation distance and navigation
- Basis for the knot (nautical miles per hour)
History of the Nautical mile
The nautical mile was historically defined as one minute of latitude along a meridian, directly tying sea navigation to the Earth's geometry, which made it practical for chart-based navigation using a ship's known latitude. The International Hydrographic Bureau standardized it at exactly 1,852 meters in 1929, a value close to the traditional latitude-based definitions used by different countries.
Historical origin. Nautical mile was not the invention of a single named person; it developed through the process described above.
Foot — sources
- NIST — International yard and pound (1959) — Fixes the modern foot at exactly 0.3048 meters.
Nautical mile — sources
- BIPM SI Brochure — Non-SI units accepted for use with SI — Lists the nautical mile among accepted non-SI units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nautical miles are in 1 foot?
1 foot equals 0.0001645788 nautical miles, using the exact defined conversion factor rather than an estimate.
How do I convert foot to nautical mile?
Multiply the foot value by 0.0001645788337. The converter above does this instantly to whatever precision you set.
How do I convert nautical mile back to foot?
Use the reverse factor: 1 nautical mile equals 6,076.115486 feet. You can also use the swap control in the converter above to flip the direction instantly.
What is a foot?
Foot (ft) measures distance. The international foot is defined as exactly 0.3048 meters. It is classified as a US/imperial customary unit.
What is a nautical mile?
Nautical mile (nmi) measures distance. The international nautical mile is defined as exactly 1,852 meters, standardized in 1929. It is classified as a Non-SI unit accepted for use with SI (maritime/aviation).
Is the foot to nautical mile conversion exact?
Yes. The international nautical mile is defined as exactly 1,852 meters, standardized in 1929. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the foot still used today?
United States (height, construction, aviation altitude) United Kingdom (height, some construction contexts)