Nautical Miles to Kilometers
Convert nautical miles to kilometers instantly, with a reference table.
Nautical Miles to Kilometers at a glance
Nautical Miles to Kilometers is a free online converter you can use right now to convert nautical miles to kilometers instantly, with a reference table โ no account, no install and no usage limit. It runs entirely inside your browser, so whatever you enter stays on your own device.
- Price
- Free โ no trial, no paid tier, no watermark
- Sign-up
- Not required
- Where it runs
- In your browser โ nothing is uploaded to a server
- Works on
- Chrome, Safari, Firefox and Edge โ desktop, tablet and phone
- Category
- Unit Conversions
Nautical Miles to Kilometers conversion table
| Nautical Miles (nmi) | Kilometers (km) |
|---|---|
| 1 nmi | 1.852 km |
| 2 nmi | 3.704 km |
| 3 nmi | 5.556 km |
| 5 nmi | 9.26 km |
| 10 nmi | 18.52 km |
| 25 nmi | 46.3 km |
| 50 nmi | 92.6 km |
| 100 nmi | 185.2 km |
| 500 nmi | 926 km |
| 1000 nmi | 1,852 km |
About Nautical Miles to Kilometers
Convert nautical miles to kilometers instantly, with a reference table of common values. The factor is exact: 1 nmi = 1.852 km.
Needed to relate a marine or aviation distance to land distances. Because the nautical mile is tied to latitude, sea and air charts use it while everything ashore is in kilometres.
The nautical mile is based on the Earth itself: it was originally one minute of latitude, and is now defined as exactly 1,852 metres. That geographic basis is precisely why it exists. It is the distance unit of sea and air navigation worldwide. Because one nautical mile equals one minute of latitude, a navigator can measure distance directly off a chart's latitude scale without any conversion. A nautical mile is about 15% longer than a statute mile, and one degree of latitude is 60 nautical miles.
Worked through with real numbers: 1 nmi is 1.852 km, 10 nmi is 18.52 km, 100 nmi is 185.2 km.
As for the other side of the conversion: A brisk walk covers about 5 km in an hour, and a marathon is 42.195 km.
Length conversions between metric and imperial are exact by definition rather than approximate. The 1959 international yard and pound agreement fixed the inch at precisely 2.54 cm and the yard at 0.9144 m, so these factors are definitions and carry no measurement error.
How to use Nautical Miles to Kilometers
- Enter the number of nautical miles you want to convert.
- The equivalent in kilometers appears instantly โ there is no button to press.
- Check the reference table for common Nautical Miles to Kilometers values.
Frequently asked questions
How do I convert nautical miles to kilometers?
Multiply your nautical miles figure by 1.852 to get kilometers โ or type a value above and read the answer straight off.
How many kilometers are in one nautical mile?
1 nmi = 1.852 km.
When would I need to convert nautical miles to kilometers?
Needed to relate a marine or aviation distance to land distances. Because the nautical mile is tied to latitude, sea and air charts use it while everything ashore is in kilometres.
What is a nautical mile, exactly?
The nautical mile is based on the Earth itself: it was originally one minute of latitude, and is now defined as exactly 1,852 metres. That geographic basis is precisely why it exists. A nautical mile is about 15% longer than a statute mile, and one degree of latitude is 60 nautical miles.
Where is the kilometer actually used?
It is the standard road-distance unit almost everywhere outside the United States and the United Kingdom, and the standard unit for running and cycling distances internationally. A brisk walk covers about 5 km in an hour, and a marathon is 42.195 km.
Is there anything tricky about length conversions?
Length conversions between metric and imperial are exact by definition rather than approximate. The 1959 international yard and pound agreement fixed the inch at precisely 2.54 cm and the yard at 0.9144 m, so these factors are definitions and carry no measurement error.
Is this converter accurate?
Yes. It uses the exact standard factor of 1 nmi = 1.852 km, and the conversion runs in your browser so nothing is uploaded.