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Nautical Miles to Kilometers (nmi to km) Converter

1 nautical mile (nmi) = 1.852 kilometers (km). To convert nautical miles to kilometers, multiply by 1.852: 12 nmi × 1.852 = 22.224 km. Also searched as nautical miles to kilometres.

1 nmi = 1.852 km
Convert the other way: Kilometers to Nautical Miles

Quick facts

How to convert nautical miles to kilometers

  1. Take the value in nautical miles.
  2. Multiply it by 1.852 (the number of kilometers in one nautical mile).
  3. Round the result to the precision you need.
km = nmi × 1.852

Worked example (the 12-nautical-mile territorial sea limit): 12 nmi × 1.852 = 22.224 km.

To convert kilometers back to nautical miles, multiply by 0.539957, or divide by 1.852.

Source: NIST Special Publication 811 (2008), Appendix B; the international yard and pound agreement of 1959 (1 inch = 25.4 mm exactly).

Nautical Miles to Kilometers conversion table

Nautical Miles to Kilometers conversion table
Nautical Miles [nmi]Kilometers [km]
0.01 nmi0.01852 km
0.1 nmi0.1852 km
1 nmi1.852 km
2 nmi3.704 km
3 nmi5.556 km
5 nmi9.26 km
10 nmi18.52 km
20 nmi37.04 km
50 nmi92.6 km
100 nmi185.2 km
1000 nmi1852 km

nmi to km chart from 1 to 100

Kilometers to Nautical Miles conversion table

Kilometers to Nautical Miles conversion table
Kilometers [km]Nautical Miles [nmi]
0.01 km0.005399568 nmi
0.1 km0.0539956803 nmi
1 km0.5399568035 nmi
2 km1.0799136069 nmi
3 km1.6198704104 nmi
5 km2.6997840173 nmi
10 km5.3995680346 nmi
20 km10.7991360691 nmi
50 km26.9978401728 nmi
100 km53.9956803456 nmi
1000 km539.9568034557 nmi

Nautical Miles vs Kilometers

Nautical MileKilometer
Symbolnmikm
Equals1 nmi = 1.852 km1 km = 0.539957 nmi

What is a nautical mile?

Defined as exactly 1,852 meters, based on one minute of latitude along a meridian. Used in maritime and aviation navigation worldwide.

What is a kilometer?

One thousand meters. Used for road distances and geography in every country except the US, UK, and Myanmar.

Frequently asked questions

How many kilometers are in a nautical mile?

There are 1.852 kilometers in 1 nautical mile (1 nmi = 1.852 km).

How many nautical miles are in a kilometer?

There are 0.539957 nautical miles in 1 kilometer (1 km = 0.5399568035 nmi).

How do I convert nautical miles to kilometers?

Multiply the number of nautical miles by 1.852. For example, 10 nmi × 1.852 = 18.52 km. To convert back, multiply by 0.539957.

What is 10 nmi in kilometers?

10 nmi = 18.52 km.

What is 100 nmi in kilometers?

100 nmi = 185.2 km.

Is the conversion exact?

Yes. The factor comes from the official definitions of both units (NIST Special Publication 811 (2008), Appendix B; the international yard and pound agreement of 1959 (1 inch = 25.4 mm exactly)). Results are shown to up to 10 decimal places; round them to suit your purpose.

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Reviewed by

Dr. Muhammad Amjad Khadim PhD Mathematics

Dr. Muhammad Amjad Khadim holds a PhD in Mathematics. He writes and reviews the guides on pakmath.com and checks every formula, conversion factor and worked example against published standards and official guidance before it goes live. Spotted an error? Tell us and it will be corrected.

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First published 28 October 2026 · Last reviewed 5 November 2026