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Convert nautical miles to kilometers

1 nmi=1.852km

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

1.852

Conversion formula

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

Example: 10 nmi × 1.852 = 18.52 km.

About both units

From

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 →
To

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 →

Nautical Mile to Kilometer conversion table

Common nautical miles to kilometers values for quick reference.

Nautical Mile (nmi)Kilometer (km)
1 nmi1.852 km
5 nmi9.26 km
10 nmi18.52 km
25 nmi46.3 km
50 nmi92.6 km
100 nmi185.2 km
250 nmi463 km
500 nmi926 km
1,000 nmi1,852 km
5,000 nmi9,260 km

Tips & common mistakes

Quick tips

  • 1 nautical mile = 1.852 km = 1.151 statute miles.
  • A knot (1 nmi/h) equals 1.852 km/h — remember this for weather and sailing reports.
  • Latitude is measured in degrees and minutes; one minute of latitude equals exactly one nautical mile.

Avoid these

  • Confusing nautical miles with statute miles — the 15% difference matters in flight planning.
  • Reading knots as km/h on weather reports — a 40-knot wind is 74 km/h, not 40.
  • Using nautical miles on land — outside navigation contexts, use kilometres or statute miles.

Frequently asked questions

How many kilometers in a nautical mile?
One nautical mile equals 1.852 kilometers.
How do I convert nautical miles to kilometers?
Multiply the nautical mile value by 1.852 to get the equivalent in kilometers.
What is 100 nautical miles in kilometers?
100 nautical miles equals 185.2 kilometers.
Is a nautical mile bigger than a kilometer?
Yes. 1 nautical mile equals 1.852 kilometers, so one nautical mile is larger.
How to convert nautical miles to kilometers without a calculator?
Multiply by 1.85 for a quick estimate; use a calculator for precise results.

Related length conversions

📊 See full comparison matrix →

More from Nautical Mile

nmi → m
1 = 1,852 m
nmi → cm
1 = 185,200 cm
nmi → mm
1 = 1,852,000 mm
nmi → mi
1 = 1.15078 mi
nmi → yd
1 = 2,025.37 yd
nmi → ft
1 = 6,076.12 ft
nmi → in
1 = 72,913.39 in
nmi → µm
1 = 1,852,000,000 µm

More to Kilometer

m → km
1 = 0.001 km
cm → km
1 = 1.0000e-5 km
mm → km
1 = 1.0000e-6 km
mi → km
1 = 1.60934 km
yd → km
1 = 0.0009144 km
ft → km
1 = 0.0003048 km
in → km
1 = 2.5400e-5 km
µm → km
1 = 1.0000e-9 km

Conversions in other categories

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