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Length

Convert kilometers to nautical miles

1 km=0.54nmi

Use the converter below to change any kilometers value into nautical miles instantly — with formula, conversion table, and real-world examples.

0.53996

Conversion formula

Forward
nautical miles = kilometers × 0.54
Reverse
kilometers = nautical miles × 1.852

Example: 10 km × 0.54 = 5.39957 nmi.

About both units

From

Kilometer

km

The kilometer equals 1000 meters and is the standard unit for road distances in almost every country except the US and UK. Speed limits in Europe, Asia, Australia and most of Africa are given in km/h. A kilometer is roughly 1250 adult walking steps and takes about 12 minutes on foot.

Real-world: London to Paris by Eurostar is 344 km. A full marathon is 42.195 km. Most European motorway speed limits are 120–130 km/h.
Read full kilometer reference →
To

Nautical Mile

nmi

The nautical mile equals 1852 meters exactly — defined as one minute of arc along a meridian. It is the standard distance unit for marine and air navigation worldwide. Ship and aircraft speeds are given in knots, where 1 knot = 1 nautical mile per hour.

Real-world: Territorial waters extend 12 nautical miles from the coastline. London Heathrow to New York JFK is about 3000 nmi.
Read full nautical mile reference →

Kilometer to Nautical Mile conversion table

Common kilometers to nautical miles values for quick reference.

Kilometer (km)Nautical Mile (nmi)
1 km0.54 nmi
5 km2.69978 nmi
10 km5.39957 nmi
25 km13.4989 nmi
50 km26.9978 nmi
100 km53.9957 nmi
250 km134.989 nmi
500 km269.978 nmi
1,000 km539.957 nmi
5,000 km2,699.78 nmi

Tips & common mistakes

Quick tips

  • 1 km ≈ 0.621 miles — a quick mental shortcut is to multiply km by 0.6 (or 5/8).
  • To convert km/h to m/s divide by 3.6. Useful in physics problems.
  • A kilometer takes a healthy adult about 10–12 minutes on foot or 3 minutes on a bicycle.

Avoid these

  • Reading a US speed-limit sign as km/h when it is actually mph — 70 mph is 112 km/h, not 70.
  • Using 1.5 instead of 1.609 when converting miles to km on long trips — the error compounds.
  • Confusing kilometer (distance) with kilogram (mass). Both abbreviated with "k" prefix but measure different things.

Frequently asked questions

How many nautical miles in a kilometer?
One kilometer equals 0.54 nautical miles.
How do I convert kilometers to nautical miles?
Multiply the kilometer value by 0.54 to get the equivalent in nautical miles.
What is 100 kilometers in nautical miles?
100 kilometers equals 53.9957 nautical miles.
Is a kilometer bigger than a nautical mile?
No. 1 kilometer equals 0.54 nautical miles, so one kilometer is smaller.
How to convert kilometers to nautical miles without a calculator?
Multiply by 0.54 for a quick estimate; use a calculator for precise results.

Related length conversions

📊 See full comparison matrix →

More from Kilometer

km → m
1 = 1,000 m
km → cm
1 = 100,000 cm
km → mm
1 = 1,000,000 mm
km → mi
1 = 0.6214 mi
km → yd
1 = 1,093.61 yd
km → ft
1 = 3,280.84 ft
km → in
1 = 39,370.08 in
km → µm
1 = 1,000,000,000 µm

More to Nautical Mile

m → nmi
1 = 0.00054 nmi
cm → nmi
1 = 5.3996e-6 nmi
mm → nmi
1 = 5.3996e-7 nmi
mi → nmi
1 = 0.869 nmi
yd → nmi
1 = 0.0004937 nmi
ft → nmi
1 = 0.0001646 nmi
in → nmi
1 = 1.3715e-5 nmi
µm → nmi
1 = 5.3996e-10 nmi

Conversions in other categories

WeightKilogram → PoundTemperatureCelsius → FahrenheitVolumeLiter → US GallonAreaSquare Meter → Square FootSpeedKilometer per Hour → Mile per HourEnergyKilojoule → KilocaloriePressureBar → Pound per Square InchPowerKilowatt → Mechanical Horsepower