Kilometers to Nautical Miles Converter
Convert kilometers to nautical miles instantly. One kilometer equals exactly 0.5399568 nautical miles. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
How to convert kilometers to nautical miles
Worked example: convert 120 kilometers to nautical miles. Using nautical miles ← kilometers × 0.5399568035, we get 120 × 0.5399568035 = 64.794816 nmi. To check the result, convert back: 64.794816 nmi ÷ 0.5399568035 = 120 km.
Kilometers to nautical miles chart
| Kilometers (km) | Nautical miles (nmi) |
|---|---|
| 1 km | 0.5399568 nmi |
| 2 km | 1.079914 nmi |
| 3 km | 1.61987 nmi |
| 4 km | 2.159827 nmi |
| 5 km | 2.699784 nmi |
| 6 km | 3.239741 nmi |
| 8 km | 4.319654 nmi |
| 10 km | 5.399568 nmi |
| 12 km | 6.479482 nmi |
| 15 km | 8.099352 nmi |
| 20 km | 10.79914 nmi |
| 25 km | 13.49892 nmi |
| 30 km | 16.1987 nmi |
| 40 km | 21.59827 nmi |
| 50 km | 26.99784 nmi |
| 75 km | 40.49676 nmi |
| 100 km | 53.99568 nmi |
| 150 km | 80.99352 nmi |
| 200 km | 107.9914 nmi |
| 250 km | 134.9892 nmi |
| 500 km | 269.9784 nmi |
| 1,000 km | 539.9568 nmi |
Nautical miles to kilometers (reverse)
| Nautical miles (nmi) | Kilometers (km) |
|---|---|
| 1 nmi | 1.852 km |
| 2 nmi | 3.704 km |
| 5 nmi | 9.26 km |
| 10 nmi | 18.52 km |
| 20 nmi | 37.04 km |
| 50 nmi | 92.6 km |
| 100 nmi | 185.2 km |
| 250 nmi | 463 km |
| 500 nmi | 926 km |
| 1,000 nmi | 1,852 km |
About the kilometer and the nautical mile
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).
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 1.852 kilometers, which makes the nautical mile the longer unit of the two.
Everyday sizes in kilometers and nautical miles
| Everyday example (approximate) | In kilometers | In nautical miles |
|---|---|---|
| The Eiffel Tower to its tip | 0.33 km | 0.17819 nmi |
| The Burj Khalifa | 0.828 km | 0.44708 nmi |
| Mount Everest's height | 8.8489 km | 4.778 nmi |
| A 10K road race | 10 km | 5.3996 nmi |
| Cruising altitude of an airliner | 10.668 km | 5.7603 nmi |
| A marathon | 42.195 km | 22.783 nmi |
Kilometers to nautical miles FAQ
How many nautical miles are in one kilometer?
One kilometer equals exactly 0.5399568035 nautical miles. In the other direction, one nautical mile equals 1.852 kilometers.
How do I convert kilometers to nautical miles without a calculator?
convert 120 kilometers to nautical miles. Using nautical miles ← kilometers × 0.5399568035, we get 120 × 0.5399568035 = 64.794816 nmi. To check the result, convert back: 64.794816 nmi ÷ 0.5399568035 = 120 km. For a quick estimate, round the factor to 0.54. Then 120 km is about 64.8 nmi, compared with the exact 64.7948 nmi (an error of 0.008%). That is close enough for planning, but use the calculator above when the number matters.
What is a marathon in nautical miles?
A marathon is about 42.195 kilometers, which is 22.783 nautical miles. Treat that as an approximate everyday figure rather than an official measurement.
Are the kilometers and nautical miles the same in every country?
The kilometer is exactly 1,000 m. The nautical mile is exactly 1,852 m by international agreement.