Nautical Miles to Kilometers Converter
One Nautical Mile equals 1.852 Kilometers (1 nmi = 1.852 km). Multiply a Nautical Mile value by 1.852 to get the equivalent in Kilometers. Enter a value above to calculate the result. You can also use the formula and reference table below.
Formula
km = nmi × 1.852
Multiply the Nautical Mile value by 1.852 to get the equivalent value in Kilometers.
Example Conversions
1 Nautical Mile (nmi)
1.852 Kilometer (km)
5 Nautical Mile (nmi)
9.26 Kilometer (km)
10 Nautical Mile (nmi)
18.52 Kilometer (km)
25 Nautical Mile (nmi)
46.3 Kilometer (km)
100 Nautical Mile (nmi)
185.2 Kilometer (km)
Conversion Table
| Nautical Mile (nmi) | Kilometer (km) |
|---|---|
| 0.1 | 0.1852 |
| 0.5 | 0.926 |
| 1 | 1.852 |
| 2 | 3.704 |
| 5 | 9.26 |
| 10 | 18.52 |
| 25 | 46.3 |
| 50 | 92.6 |
| 100 | 185.2 |
| 250 | 463 |
| 500 | 926 |
| 1000 | 1852 |
How to Convert Manually
Use these steps to convert Nautical Mile values to Kilometer without the calculator.
- Write down the value in Nautical Mile (nmi) that you want to convert.
- Multiply that value by 1.852.
- For example, 10 Nautical Miles × 1.852 = 18.52 Kilometers.
- Label the result as Kilometer (km).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Nautical Mile and one Kilometer.
About Nautical Mile and Kilometer
The nautical mile is defined as exactly 1,852 meters, originally one minute of latitude along a meridian. Marine and air navigation use it because it maps directly onto chart coordinates. The kilometer is 1,000 meters, the standard unit for road distances, maps, and geography in most of the world. Road signs, running races, and vehicle odometers outside the US and UK all use it. One Nautical Mile equals 1.852 Kilometers (1 nmi = 1.852 km). Nautical Mile is used in marine navigation and charts and in aviation flight planning. Kilometer is used in road distances and signage outside the US.
Precision and Rounding:Length factors between metric and imperial units are exact by definition (1 ft = 0.3048 m since 1959), so any rounding error comes from display precision, not the factor. Two or three decimal places suit carpentry and DIY work; machining and surveying often require four or more.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15Nautical Miles equals27.78Kilometers.
15 nmi × 1.852 = 27.78 km
FAQ
How do I convert Nautical Mile to Kilometer?
Multiply the Nautical Mile value by 1.852 to get the equivalent value in Kilometers.
What is the formula for Nautical Mile to Kilometer?
The formula is km = nmi × 1.852.
How many Kilometers are in 1 Nautical Mile?
1 Nautical Mile equals 1.852 Kilometers.
Can I convert Kilometer back to Nautical Mile?
Yes. 1 Kilometer equals 0.5399568035 Nautical Miles, and the related converter can reverse the calculation.
What are common names for Nautical Mile and Kilometer?
Nautical Mile is shown as nmi and may also be searched as nautical miles. Kilometer is shown as km and may also be searched as kilometre, kilometers, kilometres.
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