Convert Nautical miles to Kilometers
1 nautical mile is 1.85 km. One nautical mile is exactly 1.852 kilometers.
One nautical mile is 1.852 kilometers. To convert nautical miles to kilometers, multiply by 1.852; to go the other way, divide by 1.852 or multiply by 0.5399568. The factor is exact rather than rounded: it follows from NIST.
Factor checked against the defining standard · How we check
- Nautical miles × 1.852
1 * 1.8521.852 km
1 nautical mile in every length unit
| Unit | Value | Exact factor |
|---|---|---|
| inches | 72,913.38583 in | × 72,913.3858268 |
| feet | 6,076.115486 ft | × 6,076.11548556 |
| yards | 2,025.371829 yd | × 2,025.37182852 |
| miles | 1.150779448 mi | × 1.15077944802 |
| millimeters | 1,852,000 mm | × 1,852,000 |
| decimetres | 18,520 dm | × 18,520 |
| centimeters | 185,200 cm | × 185,200 |
| meters | 1,852 m | × 1,852 |
| kilometers | 1.852 km | × 1.852 |
| nautical miles (as entered) | 1 nmi | — |
| micrometers | 1,852,000,000 µm | × 1,852,000,000 |
| nanometers | 1,852,000,000,000 nm | × 1,852,000,000,000 |
| thou | 72,913,385.83 thou | × 72,913,385.8268 |
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: nautical miles to kilometres 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 nautical miles to kilometers? The converter and the working
- 1.Take the measurement in nautical miles.
- 2.Multiply by 1.852 — that is how many kilometers fit in one nautical mile.
- 3.To go back the other way, divide by 1.852, or multiply by 0.5399568.
Worked example: 25 nautical miles to kilometers
- Formula
- nmi × 1.852 = km
- Arithmetic
- 25 × 1.852 = 46.3 km
- Answer
- 25 nmi = 46.3 km
The factor is exact, so this figure is exact too — only the display is rounded.
Nautical miles to kilometers conversion table
| Nautical miles | Kilometers |
|---|---|
| 1 nmi | 1.85 km |
| 2 nmi | 3.7 km |
| 3 nmi | 5.56 km |
| 4 nmi | 7.41 km |
| 5 nmi | 9.26 km |
| 6 nmi | 11.11 km |
| 7 nmi | 12.96 km |
| 8 nmi | 14.82 km |
| 9 nmi | 16.67 km |
| 10 nmi | 18.52 km |
| 12 nmi | 22.22 km |
| 15 nmi | 27.78 km |
| 20 nmi | 37.04 km |
| 25 nmi | 46.3 km |
| 50 nmi | 92.6 km |
| 100 nmi | 185.2 km |
| 200 nmi | 370.4 km |
| 300 nmi | 555.6 km |
| 500 nmi | 926 km |
| 1000 nmi | 1,852 km |
| 2000 nmi | 3,704 km |
| 5000 nmi | 9,260 km |
| 10000 nmi | 18,520 km |
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.
What is a kilometer?
One thousand meters, and about 0.621 miles.
How many kilometers are in a nautical mile?
One nautical mile is 1.852 kilometers, exactly. Going the other way, one kilometer is 0.5399568 nautical miles. 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 nautical mile.
Source: NIST — international yard and pound agreement (inch = 25.4 mm exactly)
Cite this page
- APA
- Rule Calculator. (2026). Convert Nautical miles to kilometers. Rule Calculator. https://rulecalculators.com/convert/nautical-mile-to-kilometer
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- Chicago
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Questions people actually ask
- How many kilometers are in a nautical mile?
- 1.852. One thousand meters, and about 0.621 miles.
- How do I convert kilometers back to nautical miles?
- Divide by 1.852, or multiply by 0.5399568 — they are the same operation.
Other length conversions
Kilometers to nautical miles — the same conversion the other way.