Nautical Miles to KM Converter

One nautical mile equals 1.852 kilometers (km). To convert nautical miles to kilometers, multiply by 1.852; to go back the other way, multiply by 0.5399568 instead.

The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.

What nautical miles and kilometers actually measure

Nautical mile (nmi) — A nautical mile is exactly 1,852 metres — one minute of latitude. Marine and air navigation, where it maps directly onto a chart.

Kilometer (km) — A kilometre is a thousand metres. Road distances, running events and map scales outside the US and UK.

Nautical Miles to KM conversion table

The most common values, worked out in advance. Anything not listed can be typed straight into the converter.

How to convert nautical miles to kilometers by hand

Multiply the number of nautical miles by 1.852.

For example, 25 nmi × 1.852 = 46.3 km.

Going the other way, divide by 1.852 — or multiply by 0.5399568, which is the same thing and easier to do in your head.

Everything runs in your browser

There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.