Nautical Miles to Miles Converter (nmi to mi)
1 nmi = 1.150779 mi. Convert nautical miles to statute miles for boating, flying, offshore races and US state waters, with charts both ways.
Mile (mi) = Nautical Mile (nmi) × 1.15077944802
Nautical Mile (nmi): The international nautical mile is exactly 1852 metres. It was chosen because it is close to one minute of latitude, and it is used in sea and air navigation together with the knot (one nautical mile per hour).
Mile (mi): The international (statute) mile is exactly 1609.344 metres, or 5280 feet. It is the unit for road distances and speed limits in the United States and the United Kingdom.
| Nautical Mile (nmi) | Mile (mi) |
|---|---|
| 1 | 1.15077944802 |
| 5 | 5.75389724012 |
| 10 | 11.5077944802 |
| 25 | 28.7694862006 |
| 50 | 57.5389724012 |
| 100 | 115.077944802 |
Boaters and pilots measure distance in nautical miles, while land maps, cars and most people in the US and UK think in statute miles, so a passage or an aircraft range often needs translating. A nautical mile is exactly 1,852 m and a statute mile exactly 1,609.344 m, which makes one nautical mile about 1.1508 statute miles.
The gap matters for speed too: a boat making 20 knots covers 20 nautical miles an hour, about 23 mph. Coastal law in the US also uses the nautical mile, since state waters end 3 nmi offshore for most coastal states and 9 nmi for Texas, Puerto Rico and Florida's Gulf coast.
How to use this tool
- Type a value in the Nautical Mile box to see it in miles, or type in the Mile box to convert the other way.
- Press ⇄ to swap the two units, or Load example for a typical value.
- Check the charts below for common values; for other units, open the Length converter.
Formula
Mile (mi) = Nautical Mile (nmi) × 1.15077944802
Nautical Mile (nmi) = Mile (mi) × 0.868976241901
Both factors come from exact definitions: 1 mile = 0.868976241901 nautical miles and 1 nautical mile = 1.15077944802 miles (shown to 12 significant digits).
Example
Two conversions worked with the same factors the converter uses:
3 nmi × 1.15077944802 ≈ 3.45234 mi
50 mi × 0.868976241901 ≈ 43.4488 nmi
Nautical Mile to Mile chart
Common values from nautical miles to miles, rounded to four decimal places.
| Nautical Mile (nmi) | Mile (mi) |
|---|---|
| 0.25 | 0.2877 |
| 0.5 | 0.5754 |
| 1 | 1.1508 |
| 1.5 | 1.7262 |
| 2 | 2.3016 |
| 3 | 3.4523 |
| 4 | 4.6031 |
| 6 | 6.9047 |
| 9 | 10.357 |
| 10 | 11.5078 |
| 12 | 13.8094 |
| 18 | 20.714 |
| 20 | 23.0156 |
| 30 | 34.5234 |
| 40 | 46.0312 |
| 75 | 86.3085 |
| 100 | 115.0779 |
| 200 | 230.1559 |
| 350 | 402.7728 |
| 500 | 575.3897 |
| 1,000 | 1,150.78 |
Mile to Nautical Mile chart
The reverse direction for values people often look up.
| Mile (mi) | Nautical Mile (nmi) |
|---|---|
| 1 | 0.869 |
| 2 | 1.738 |
| 5 | 4.3449 |
| 10 | 8.6898 |
| 15 | 13.0346 |
| 25 | 21.7244 |
| 50 | 43.4488 |
| 100 | 86.8976 |
| 150 | 130.3464 |
| 250 | 217.2441 |
| 500 | 434.4881 |
| 1,000 | 868.9762 |
Offshore distances in nautical miles
| Item | Nautical Mile (nmi) | Mile (mi) |
|---|---|---|
| State waters off most US coastal states | 3 | 3.4523 |
| State waters off Texas, Puerto Rico and Gulf coast Florida | 9 | 10.357 |
| Newport Bermuda Race | 635 | 730.7449 |
| Transpacific Yacht Race, Los Angeles to Honolulu | 2,225 | 2,560.48 |
| Distance covered in one hour at 20 knots | 20 | 23.0156 |
| Sea mile, about one minute of latitude | 1 | 1.1508 |
Quick mental estimate
Add 15% to the nautical miles: 10 nmi → 10 + 1.5 = 11.5 mi, against an exact 11.508 mi. The estimate is within 0.1% of the true factor, about 0.07% low.
Use the converter or the charts when the exact figure matters.
The two units
Nautical Mile (nmi): The international nautical mile is exactly 1852 metres. It was chosen because it is close to one minute of latitude, and it is used in sea and air navigation together with the knot (one nautical mile per hour).
Mile (mi): The international (statute) mile is exactly 1609.344 metres, or 5280 feet. It is the unit for road distances and speed limits in the United States and the United Kingdom.
Frequently asked questions
Is a knot the same as a mile per hour?
No. A knot is one nautical mile per hour, about 1.15 mph, so 30 knots is roughly 34.5 mph. US marine forecasts give wind speeds at sea in knots.
Why do boats and planes use a different mile?
The nautical mile closely matches one minute of latitude, so navigators can measure distances on a chart with its latitude scale. The statute mile comes from English land measurement and has no link to the size of the Earth.
How far is the Newport Bermuda Race in statute miles?
The course is 635 nmi, which is about 730.7 statute miles (1,176 km). Offshore race distances are normally published in nautical miles.
How precise is the result?
The converter uses the exact definitions above with browser floating-point arithmetic and shows up to 12 significant digits. The charts round to four decimal places for reading.
Sources
Last updated:
Page address with these inputs: https://kakao.mobile/tools/nautical-mile-to-mile-converter/
Cite or embed this tool
kakaoCalc. (2026, November 8). Nautical Miles to Miles Converter (nmi to mi). https://kakao.mobile/tools/nautical-mile-to-mile-converter/
“Nautical Miles to Miles Converter (nmi to mi).” kakaoCalc, 8 Nov. 2026, kakao.mobile/tools/nautical-mile-to-mile-converter/.
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