This converter turns nautical miles into kilometers instantly, using the exact factor 1 nautical mile = 1.852 kilometers. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
Exactly 1,852 metres — one minute of latitude, the basis of marine and air navigation. One thousand metres — the standard road-distance unit almost everywhere outside the US and UK.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
nautical miles- The amount you are converting, measured in nautical miles
1.852- The exact number of kilometers in one nautical mile
kilometers- The converted result
How it works, step by step
- Enter the number of nautical miles you want to convert.
- The value is multiplied by 1.852, the exact conversion factor.
- The result is displayed in kilometers, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 nautical miles
Multiply 5 by 1.852. That gives 9.26 kilometers. A quick sanity check: one nautical mile is larger than one kilometer, so the number should get bigger — and it does.
Converting 72 nautical miles
72 × 1.852 = 133.344 kilometers. Working backwards, 133.344 ÷ 1.852 returns 72 nautical miles, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many kilometers are in one nautical mile?
Exactly 1.852. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert nautical miles to kilometers?
Kilometers = nautical miles × 1.852. To reverse it, divide instead: nautical miles = kilometers ÷ 1.852, which is the same as multiplying by 0.5399568035.
Is the nautical mile bigger than the kilometer?
Yes. One nautical mile equals 1.852 kilometers, so it is the larger unit.
Why does my answer differ slightly from other nautical-miles to km converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a nautical mile?
Exactly 1,852 metres — one minute of latitude, the basis of marine and air navigation.
What is a kilometer?
One thousand metres — the standard road-distance unit almost everywhere outside the US and UK.
Nautical Miles to kilometers reference table
| Nautical Miles | Kilometers |
|---|---|
| 0.5 nmi | 0.926 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 |
| 15 nmi | 27.78 km |
| 20 nmi | 37.04 km |
| 25 nmi | 46.3 km |
| 50 nmi | 92.6 km |
| 75 nmi | 138.9 km |
| 100 nmi | 185.2 km |
| 250 nmi | 463 km |
| 500 nmi | 926 km |
| 1000 nmi | 1,852 km |
Exact factor: 1 nautical mile = 1.852 kilometers. Values rounded for display.