Nautical Miles to Kilometers Converter
Convert nautical miles to kilometers instantly. One nautical mile equals exactly 1.852 kilometers. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
How to convert nautical miles to kilometers
Worked example: convert 250 nautical miles to kilometers. Using kilometers ← nautical miles × 1.852, we get 250 × 1.852 = 463 km. To check the result, convert back: 463 km ÷ 1.852 = 250 nmi.
Nautical miles to kilometers chart
| Nautical miles (nmi) | Kilometers (km) |
|---|---|
| 1 nmi | 1.852 km |
| 2 nmi | 3.704 km |
| 3 nmi | 5.556 km |
| 4 nmi | 7.408 km |
| 5 nmi | 9.26 km |
| 6 nmi | 11.112 km |
| 8 nmi | 14.816 km |
| 10 nmi | 18.52 km |
| 12 nmi | 22.224 km |
| 15 nmi | 27.78 km |
| 20 nmi | 37.04 km |
| 25 nmi | 46.3 km |
| 30 nmi | 55.56 km |
| 40 nmi | 74.08 km |
| 50 nmi | 92.6 km |
| 75 nmi | 138.9 km |
| 100 nmi | 185.2 km |
| 150 nmi | 277.8 km |
| 200 nmi | 370.4 km |
| 250 nmi | 463 km |
| 500 nmi | 926 km |
| 1,000 nmi | 1,852 km |
Kilometers to nautical miles (reverse)
| Kilometers (km) | Nautical miles (nmi) |
|---|---|
| 1 km | 0.5399568 nmi |
| 2 km | 1.079914 nmi |
| 5 km | 2.699784 nmi |
| 10 km | 5.399568 nmi |
| 20 km | 10.79914 nmi |
| 50 km | 26.99784 nmi |
| 100 km | 53.99568 nmi |
| 250 km | 134.9892 nmi |
| 500 km | 269.9784 nmi |
| 1,000 km | 539.9568 nmi |
About the nautical mile and the kilometer
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.
A kilometer (kilometre) is 1,000 meters and the standard road-distance unit in most countries. A brisk walker covers about 5 km in an hour, and popular race distances are 5 km, 10 km, the half marathon (21.0975 km) and the marathon (42.195 km).
One nautical mile equals 1.852 kilometers, which makes the nautical mile the longer unit of the two.
Everyday sizes in nautical miles and kilometers
| Everyday example (approximate) | In nautical miles | In kilometers |
|---|---|---|
| The Eiffel Tower to its tip | 0.17819 nmi | 0.33 km |
| The Burj Khalifa | 0.44708 nmi | 0.828 km |
| Mount Everest's height | 4.778 nmi | 8.8489 km |
| A 10K road race | 5.3996 nmi | 10 km |
| Cruising altitude of an airliner | 5.7603 nmi | 10.668 km |
| A marathon | 22.783 nmi | 42.195 km |
Nautical miles to kilometers FAQ
How many kilometers are in one nautical mile?
One nautical mile equals exactly 1.852 kilometers. In the other direction, one kilometer equals 0.5399568 nautical miles.
How do I convert nautical miles to kilometers without a calculator?
convert 250 nautical miles to kilometers. Using kilometers ← nautical miles × 1.852, we get 250 × 1.852 = 463 km. To check the result, convert back: 463 km ÷ 1.852 = 250 nmi. For a quick estimate, round the factor to 1.9. Then 250 nmi is about 475 km, compared with the exact 463 km (an error of 2.6%). That is close enough for planning, but use the calculator above when the number matters.
What is the Burj Khalifa in kilometers?
The Burj Khalifa is about 0.44708 nautical miles, which is 0.828 kilometers. Treat that as an approximate everyday figure rather than an official measurement.
Are the nautical miles and kilometers the same in every country?
The nautical mile is exactly 1,852 m by international agreement. The kilometer is exactly 1,000 m.