Miles to Nautical Miles Converter
Convert miles to nautical miles instantly. One mile equals exactly 0.8689762 nautical miles. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
How to convert miles to nautical miles
Worked example: convert 15 miles to nautical miles. Using nautical miles ← miles × 0.8689762419, we get 15 × 0.8689762419 = 13.034644 nmi. To check the result, convert back: 13.034644 nmi ÷ 0.8689762419 = 15 mi.
Miles to nautical miles chart
| Miles (mi) | Nautical miles (nmi) |
|---|---|
| 1 mi | 0.8689762 nmi |
| 2 mi | 1.737952 nmi |
| 3 mi | 2.606929 nmi |
| 4 mi | 3.475905 nmi |
| 5 mi | 4.344881 nmi |
| 6 mi | 5.213857 nmi |
| 8 mi | 6.95181 nmi |
| 10 mi | 8.689762 nmi |
| 12 mi | 10.42771 nmi |
| 15 mi | 13.03464 nmi |
| 20 mi | 17.37952 nmi |
| 25 mi | 21.72441 nmi |
| 30 mi | 26.06929 nmi |
| 40 mi | 34.75905 nmi |
| 50 mi | 43.44881 nmi |
| 75 mi | 65.17322 nmi |
| 100 mi | 86.89762 nmi |
| 150 mi | 130.3464 nmi |
| 200 mi | 173.7952 nmi |
| 250 mi | 217.2441 nmi |
| 500 mi | 434.4881 nmi |
| 1,000 mi | 868.9762 nmi |
Nautical miles to miles (reverse)
| Nautical miles (nmi) | Miles (mi) |
|---|---|
| 1 nmi | 1.150779 mi |
| 2 nmi | 2.301559 mi |
| 5 nmi | 5.753897 mi |
| 10 nmi | 11.50779 mi |
| 20 nmi | 23.01559 mi |
| 50 nmi | 57.53897 mi |
| 100 nmi | 115.0779 mi |
| 250 nmi | 287.6949 mi |
| 500 nmi | 575.3897 mi |
| 1,000 nmi | 1,150.779 mi |
About the mile and the nautical mile
The statute mile equals 5,280 feet. It is the official road-distance unit in the United States and United Kingdom, where speed limits are posted in miles per hour, and it is also used in running and aviation contexts.
The nautical mile is roughly one minute of latitude. Ships and aircraft use it for navigation, and one nautical mile per hour is one knot.
One nautical mile equals 1.150779 miles, which makes the nautical mile the longer unit of the two.
Everyday sizes in miles and nautical miles
| Everyday example (approximate) | In miles | In nautical miles |
|---|---|---|
| The Eiffel Tower to its tip | 0.20505 mi | 0.17819 nmi |
| The Burj Khalifa | 0.5145 mi | 0.44708 nmi |
| Mount Everest's height | 5.4984 mi | 4.778 nmi |
| A 10K road race | 6.2137 mi | 5.3996 nmi |
| Cruising altitude of an airliner | 6.6288 mi | 5.7603 nmi |
| A marathon | 26.219 mi | 22.783 nmi |
Miles to nautical miles FAQ
How many nautical miles are in one mile?
One mile equals exactly 0.8689762419 nautical miles. In the other direction, one nautical mile equals 1.1507794 miles.
How do I convert miles to nautical miles without a calculator?
convert 15 miles to nautical miles. Using nautical miles ← miles × 0.8689762419, we get 15 × 0.8689762419 = 13.034644 nmi. To check the result, convert back: 13.034644 nmi ÷ 0.8689762419 = 15 mi. For a quick estimate, round the factor to 0.87. Then 15 mi is about 13.05 nmi, compared with the exact 13.0346 nmi (an error of 0.12%). That is close enough for planning, but use the calculator above when the number matters.
What is a 10K road race in nautical miles?
A 10K road race is about 6.2137 miles, which is 5.3996 nautical miles. Treat that as an approximate everyday figure rather than an official measurement.
Are the miles and nautical miles the same in every country?
The statute mile is exactly 1,609.344 m. Do not confuse it with the nautical mile of 1,852 m. The nautical mile is exactly 1,852 m by international agreement.