Convert Kilometre to Nautical Mile
1 kilometre = 0.5399568 nautical mile (nmi). For example, 10 kilometre = 5.399568 nautical mile and 100 kilometre = 53.99568 nautical mile. Type any value below to convert kilometre to nautical mile both ways — it runs entirely in your browser.
Quick answer: Kilometre to Nautical Mile
1 Kilometre = 0.5399568 Nautical Mile (km → nmi). To convert kilometre to nautical mile, multiply by 0.5399568. To convert nautical mile to kilometre, multiply by 1.852. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common kilometre-to-nautical mile questions.
How to convert Kilometre to Nautical Mile
To convert kilometre to nautical mile, multiply the number of kilometre by the conversion factor 0.5399568, because 1 km = 0.5399568 nmi. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 nmi = 1.852 km, so you divide by 0.5399568 (or multiply by 1.852) to turn nautical mile back into kilometre.
nmi = km × 0.5399568 ·
km = nmi × 1.852
- Write down the value you want to convert, in kilometre.
- Multiply it by 0.5399568.
- The result is the same area/length/quantity expressed in nautical mile.
Kilometre to Nautical Mile — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 kilometre is 2.699784 nautical mile because 5 km × 0.5399568 = 2.699784 nmi.
| Kilometre | Calculation | Nautical Mile |
|---|---|---|
| 1 km | 1 km × 0.5399568 = 0.5399568 nmi | 0.5399568 nmi |
| 2 km | 2 km × 0.5399568 = 1.079914 nmi | 1.079914 nmi |
| 3 km | 3 km × 0.5399568 = 1.61987 nmi | 1.61987 nmi |
| 5 km | 5 km × 0.5399568 = 2.699784 nmi | 2.699784 nmi |
| 7 km | 7 km × 0.5399568 = 3.779698 nmi | 3.779698 nmi |
| 10 km | 10 km × 0.5399568 = 5.399568 nmi | 5.399568 nmi |
| 12 km | 12 km × 0.5399568 = 6.479482 nmi | 6.479482 nmi |
| 15 km | 15 km × 0.5399568 = 8.099352 nmi | 8.099352 nmi |
| 20 km | 20 km × 0.5399568 = 10.79914 nmi | 10.79914 nmi |
| 25 km | 25 km × 0.5399568 = 13.49892 nmi | 13.49892 nmi |
| 50 km | 50 km × 0.5399568 = 26.99784 nmi | 26.99784 nmi |
| 100 km | 100 km × 0.5399568 = 53.99568 nmi | 53.99568 nmi |
Common Kilometre to Nautical Mile conversions
These are the kilometre-to-nautical mile values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 kilometre = 0.5399568 nautical mile
- 2 kilometre = 1.079914 nautical mile
- 2.5 kilometre = 1.349892 nautical mile
- 3 kilometre = 1.61987 nautical mile
- 4 kilometre = 2.159827 nautical mile
- 5 kilometre = 2.699784 nautical mile
- 6 kilometre = 3.239741 nautical mile
- 7 kilometre = 3.779698 nautical mile
- 8 kilometre = 4.319654 nautical mile
- 9 kilometre = 4.859611 nautical mile
- 10 kilometre = 5.399568 nautical mile
- 12 kilometre = 6.479482 nautical mile
- 15 kilometre = 8.099352 nautical mile
- 20 kilometre = 10.79914 nautical mile
- 25 kilometre = 13.49892 nautical mile
- 30 kilometre = 16.1987 nautical mile
- 50 kilometre = 26.99784 nautical mile
- 75 kilometre = 40.49676 nautical mile
- 100 kilometre = 53.99568 nautical mile
- 200 kilometre = 107.9914 nautical mile
- 500 kilometre = 269.9784 nautical mile
- 1000 kilometre = 539.9568 nautical mile
Kilometre to Nautical Mile conversion chart (both directions)
The chart below converts kilometre to nautical mile and nautical mile to kilometre side by side, so it works whichever way you need. 1 kilometre = 0.5399568 nautical mile, and 1 nautical mile = 1.852 kilometre.
| Kilometre → Nautical Mile | Nautical Mile → Kilometre |
|---|---|
| 0.25 km = 0.1349892 nmi | 0.25 nmi = 0.463 km |
| 0.5 km = 0.2699784 nmi | 0.5 nmi = 0.926 km |
| 1 km = 0.5399568 nmi | 1 nmi = 1.852 km |
| 2 km = 1.079914 nmi | 2 nmi = 3.704 km |
| 3 km = 1.61987 nmi | 3 nmi = 5.556 km |
| 4 km = 2.159827 nmi | 4 nmi = 7.408 km |
| 5 km = 2.699784 nmi | 5 nmi = 9.26 km |
| 6 km = 3.239741 nmi | 6 nmi = 11.112 km |
| 7 km = 3.779698 nmi | 7 nmi = 12.964 km |
| 8 km = 4.319654 nmi | 8 nmi = 14.816 km |
| 9 km = 4.859611 nmi | 9 nmi = 16.668 km |
| 10 km = 5.399568 nmi | 10 nmi = 18.52 km |
| 12 km = 6.479482 nmi | 12 nmi = 22.224 km |
| 15 km = 8.099352 nmi | 15 nmi = 27.78 km |
| 20 km = 10.79914 nmi | 20 nmi = 37.04 km |
| 25 km = 13.49892 nmi | 25 nmi = 46.3 km |
| 30 km = 16.1987 nmi | 30 nmi = 55.56 km |
| 40 km = 21.59827 nmi | 40 nmi = 74.08 km |
| 50 km = 26.99784 nmi | 50 nmi = 92.6 km |
| 75 km = 40.49676 nmi | 75 nmi = 138.9 km |
| 100 km = 53.99568 nmi | 100 nmi = 185.2 km |
| 150 km = 80.99352 nmi | 150 nmi = 277.8 km |
| 200 km = 107.9914 nmi | 200 nmi = 370.4 km |
| 250 km = 134.9892 nmi | 250 nmi = 463 km |
| 500 km = 269.9784 nmi | 500 nmi = 926 km |
| 1000 km = 539.9568 nmi | 1000 nmi = 1,852 km |
Kilometre vs Nautical Mile: which is bigger?
A nautical mile is the larger unit: one nautical mile equals 1.852 kilometres. Put another way, you need 1.852 kilometres to make a single nautical mile.
What is a Kilometre? History, origin and usage
The kilometre combines the Greek-derived prefix 'kilo-' (from khilioi, 'thousand') with the metre. It was among the eight original decimal prefixes adopted by the French Academy of Sciences in 1795, soon after the metre itself was defined during the French Revolution.
The kilometre is the standard unit for road, map and geographic distances throughout most of the world. Nearly every country signs its highways and speed limits in kilometres; the main holdouts that still post road distances in miles are the United States and the United Kingdom.
Although the prefix 'kilo-' comes from Greek, the names of the metric submultiples such as deci- and centi- were drawn from Latin instead. The popular running benchmark known as a '5K' is simply a five-kilometre race.
What is a Nautical Mile? History, origin and usage
The nautical mile arose from navigation: it was defined as the length of one minute of arc of latitude along a meridian, so 60 nautical miles span one degree and Earth's circumference is close to 21,600 of them. Because the Earth is not a perfect sphere this length varied slightly with latitude, so a 1929 international conference in Monaco fixed the international nautical mile at exactly 1,852 metres.
The nautical mile is the standard distance unit in marine and air navigation worldwide. Speed at sea and in the air is measured in knots, one knot being one nautical mile per hour.
Its link to latitude means a navigator can read distance straight off a chart's latitude scale. A minute of latitude is about 1,843 metres at the Equator but roughly 1,862 metres near the poles because of Earth's flattening.
Convert 1 Kilometre to other units
It can help to see a kilometre next to the other units it is commonly compared with. One kilometre (km) is equal to:
| 1 Kilometre equals | Unit |
|---|---|
| 1,000 m | Metre |
| 10,000 dm | Decimetre |
| 100,000 cm | Centimetre |
| 1,000,000 mm | Millimetre |
| 1,000,000,000 µm | Micrometre |
| 0.6213712 mi | Mile |
| 1,093.613 yd | Yard |
| 3,280.84 ft | Foot |
| 39,370.08 in | Inch |
| 0.5399568 nmi | Nautical Mile |
| 4.97097 fur | Furlong |
| 49.7097 ch | Chain |
| 4,970.97 li | Link |
| 198.8388 rd | Rod |
| 198.8388 pole | Pole |
| 546.8066 ftm | Fathom |
| 9,842.52 hand | Hand |
| 4,374.453 span | Span |
| 8,748.906 finger | Finger |
| 2,187.227 cubit | Cubit |
| 164.042 rope | Rope |
| 550 ken | Ken |
| 0.2071237 lea | League |
| 2,834,646 pt | Point |
| 6.6846e-9 AU | Astronomical Unit |
| 1.057e-13 ly | Light-year |
| 100 dam | Decametre |
| 10 hm | Hectometre |
| 0.1799856 nl | Nautical League |
Convert 1 Nautical Mile to other units
One nautical mile (nmi) is equal to:
| 1 Nautical Mile equals | Unit |
|---|---|
| 1.852 km | Kilometre |
| 1,852 m | Metre |
| 18,520 dm | Decimetre |
| 185,200 cm | Centimetre |
| 1,852,000 mm | Millimetre |
| 1,852,000,000 µm | Micrometre |
| 1.150779 mi | Mile |
| 2,025.372 yd | Yard |
| 6,076.115 ft | Foot |
| 72,913.39 in | Inch |
| 9.206236 fur | Furlong |
| 92.06236 ch | Chain |
| 9,206.236 li | Link |
| 368.2494 rd | Rod |
| 368.2494 pole | Pole |
| 1,012.686 ftm | Fathom |
| 18,228.35 hand | Hand |
| 8,101.487 span | Span |
| 16,202.97 finger | Finger |
| 4,050.744 cubit | Cubit |
| 303.8058 rope | Rope |
| 1,018.6 ken | Ken |
| 0.3835931 lea | League |
| 5,249,764 pt | Point |
| 1.238e-8 AU | Astronomical Unit |
| 1.9576e-13 ly | Light-year |
| 185.2 dam | Decametre |
| 18.52 hm | Hectometre |
| 0.3333333 nl | Nautical League |
Tips for converting Kilometre to Nautical Mile
- To go from kilometre to nautical mile, multiply by 0.5399568; to go back, divide by 0.5399568 (or multiply by 1.852).
- For a quick mental estimate, remember that 1 kilometre ≈ 0.5399568 nautical mile, so 10 kilometre ≈ 5.399568 nautical mile.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Kilometre to Nautical Mile converter
Type a number into the Kilometre field and the equivalent in Nautical Mile appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Nautical Mile field to convert the other way (nautical mile to kilometre). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 km = 0.5399568 nmi), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for kilometre-to-nautical mile conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
The metric units (km, m, cm, mm, µm) are exact by definition, and the imperial units (mile, yard, foot, inch, nautical mile) use their exact international values. Traditional units (hand, span, finger, cubit, rod/pole, link, rope, ken, league) are given at their commonly accepted standard sizes — historical local values sometimes differed, so confirm against a primary source before relying on them for legal or historical work.
Frequently asked questions
- How many nautical mile are in 1 kilometre?
- 1 kilometre = 0.5399568 nautical mile (nmi). To convert any number of kilometre to nautical mile, multiply by 0.5399568.
- How do I convert kilometre to nautical mile?
- Multiply the number of kilometre by 0.5399568. For example, 10 kilometre = 10 × 0.5399568 = 5.399568 nautical mile, and 25 kilometre = 13.49892 nautical mile.
- How many kilometre are in 1 nautical mile?
- 1 nautical mile = 1.852 kilometre. So to convert nautical mile back to kilometre, multiply by 1.852.
- What is the formula to convert kilometre to nautical mile?
- nautical mile = kilometre × 0.5399568. The reverse formula is kilometre = nautical mile × 1.852.
- How much is 100 kilometre in nautical mile?
- 100 kilometre = 53.99568 nautical mile. (And 1000 kilometre = 539.9568 nautical mile.)
- Which is bigger, a kilometre or a nautical mile?
- A nautical mile is larger: 1 nautical mile = 1.852 kilometre.
- Is this kilometre to nautical mile converter accurate?
- Yes — every value is computed from the exact 0.5399568 nmi per km factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert nautical mile to kilometre too?
- Yes. The converter works both ways — enter a value in either field. 1 nautical mile = 1.852 kilometre.