Convert Kilometers to Nautical miles
1 kilometer is 0.54 nmi. One kilometer is exactly 0.539956803456 nautical miles.
One kilometer is 0.5399568 nautical miles. To convert kilometers to nautical miles, multiply by 0.5399568; to go the other way, divide by 0.5399568 or multiply by 1.852. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST. One thousand meters, and about 0.621 miles.
Factor checked against the defining standard · How we check
- Kilometers × 0.5399568
1 * 0.53995680.54 nmi
1 kilometer in every length unit
| Unit | Value | Exact factor |
|---|---|---|
| inches | 39,370.07874 in | × 39,370.0787402 |
| feet | 3,280.839895 ft | × 3,280.83989501 |
| yards | 1,093.613298 yd | × 1,093.61329834 |
| miles | 0.6213711922 mi | × 0.621371192237 |
| millimeters | 1,000,000 mm | × 1,000,000 |
| decimetres | 10,000 dm | × 10,000 |
| centimeters | 100,000 cm | × 100,000 |
| meters | 1,000 m | × 1,000 |
| kilometers (as entered) | 1 km | — |
| nautical miles | 0.5399568035 nmi | × 0.539956803456 |
| micrometers | 1,000,000,000 µm | × 1,000,000,000 |
| nanometers | 1,000,000,000,000 nm | × 1,000,000,000,000 |
| thou | 39,370,078.74 thou | × 39,370,078.7402 |
Factors are entered by hand from NIST rather than derived from a units library, so the ones that terminate are exact rather than rounded.
The same converter answers this pair however it is written: kilometres to nautical miles is the British spelling of the same units — the metre and the litre are spelled that way outside the United States and the quantity does not change.
How do you convert kilometers to nautical miles? The converter and the working
- 1.Take the measurement in kilometers.
- 2.Multiply by 0.5399568 — that is how many nautical miles fit in one kilometer.
- 3.To go back the other way, divide by 0.5399568, or multiply by 1.852.
Worked example: 25 kilometers to nautical miles
- Formula
- km × 0.5399568 = nmi
- Arithmetic
- 25 × 0.5399568 = 13.5 nmi
- Answer
- 25 km = 13.5 nmi
The factor is rounded for display; the figure above is computed from the full value.
Kilometers to nautical miles conversion table
| Kilometers | Nautical miles |
|---|---|
| 1 km | 0.54 nmi |
| 2 km | 1.08 nmi |
| 3 km | 1.62 nmi |
| 4 km | 2.16 nmi |
| 5 km | 2.7 nmi |
| 6 km | 3.24 nmi |
| 7 km | 3.78 nmi |
| 8 km | 4.32 nmi |
| 9 km | 4.86 nmi |
| 10 km | 5.4 nmi |
| 12 km | 6.48 nmi |
| 15 km | 8.1 nmi |
| 20 km | 10.8 nmi |
| 25 km | 13.5 nmi |
| 50 km | 27 nmi |
| 100 km | 54 nmi |
| 200 km | 107.99 nmi |
| 300 km | 161.99 nmi |
| 500 km | 269.98 nmi |
| 1000 km | 539.96 nmi |
| 2000 km | 1,079.91 nmi |
| 5000 km | 2,699.78 nmi |
| 10000 km | 5,399.57 nmi |
What is a kilometer?
One thousand meters, and about 0.621 miles.
What is a nautical mile?
Exactly 1,852 meters by international agreement since 1929, chosen because it is one minute of latitude — which is why a chart, a speed in knots and a position in degrees all use the same arithmetic.
How many nautical miles are in a kilometer?
One kilometer is 0.5399568 nautical miles. Going the other way, one nautical mile is 1.852 kilometers. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every length unit here
The whole group — 13 units with their symbols and the size of each one in meters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a kilometer.
Source: NIST — international yard and pound agreement (inch = 25.4 mm exactly)
Cite this page
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- Chicago
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Questions people actually ask
- How many nautical miles are in a kilometer?
- 0.5399568. Exactly 1,852 meters by international agreement since 1929, chosen because it is one minute of latitude — which is why a chart, a speed in knots and a position in degrees all use the same arithmetic.
- How do I convert nautical miles back to kilometers?
- Divide by 0.5399568, or multiply by 1.852 — they are the same operation.
Other length conversions
Nautical miles to kilometers — the same conversion the other way.