Nautical miles to Kilometers Converter
Type a value in nautical miles to get it in kilometers, and see the reverse conversion.
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Nautical miles to Kilometers Converter by TheCalcTools
How the Nautical miles to Kilometers Converter works
The international nautical mile is exactly 1,852 metres, close to one minute of latitude. It is used at sea and in aviation together with the knot (one nautical mile per hour).
To convert nautical miles to kilometers, multiply by 1.852. The calculator shows the result to 6 significant figures; the conversion factor itself is exact by definition.
Quick estimate in your head: multiply by 1.85.
The formula
Worked example
Using the default values shown in the calculator:
| Value in nautical miles (nmi) | 10 |
|---|
- 10 nmi × 1.852 = 18.52 km.
Result:
| Kilometers (km) | 18.52 |
|---|---|
| 1 nmi in km | 1.852 |
| Your number read as km, in nmi | 5.39957 |
| Miles (mi) | 11.5078 |
Conversion table
| nmi | 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 |
| 200 nmi | 370.4 km |
| 500 nmi | 926 km |
| 1,000 nmi | 1,852 km |
Frequently asked questions
What is 1 nautical mile in kilometers?
1 nautical mile (nmi) equals 1.852 km.
Why is a nautical mile longer than a mile?
It is based on the Earth’s circumference (one arc-minute of latitude), not on the Roman mile.
Sources and further reading
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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.