Online Tool Store
Nautical Unit Converter
Convert between nautical miles, knots, and fathoms and their statute and metric equivalents, for sailing, aviation, and marine navigation. Runs entirely in your browser.
This works right here on your device — nothing gets sent out.
Example
Nautical Unit Converter
- Distance
- 25 nautical miles
- Speed
- 12 knots
Example shown — replace it with your own value.
Result
12 kn = 13.81 mph = 22.22 km/h
How it works
- Enter a distance or speed in nautical units.
- Fixed conversion factors are applied to statute and metric units.
- Both equivalents appear side by side.
The conversions
1 nautical mile = 1.15078 mi = 1.852 km
1 knot = 1.15078 mph = 1.852 km/h
1 fathom = 6 ft = 1.8288 m
FAQ
What is a nautical mile based on?
One nautical mile equals one minute of latitude — about 1.852 km, or roughly 1.15 statute (land) miles. It stays constant worldwide, unlike degrees of longitude.
How is a knot different from mph?
A knot is a speed of one nautical mile per hour. 1 knot ≈ 1.15078 mph ≈ 1.852 km/h — the same ratio as the distance units.
What is a fathom used for?
A fathom (6 feet, 1.8288 m) traditionally measures water depth and is still used on nautical charts and in diving and sailing contexts.
How we compare
| Feature | Online Tool Store | Marine navigation app | Manual conversion table |
|---|---|---|---|
| No app install needed | Yes | No | Yes |
| Covers distance, speed, and depth | Yes | Varies | Rarely all three |
| Quick one-off conversion | Yes | Overkill | Slow to look up |
For a quick nautical-to-statute conversion, this is faster than opening a full navigation app.