# Convert nautical miles to kilometers

Enter the number of nautical miles you want to convert to kilometers in the text box below. The conversion to length in kilometers will update as you type.

nautical miles (nmi)
1 nautical miles = 1.852 kilometers

## Precise decimal and fraction answers

The conversion in kilometers rounded to six significant decimal places is 1 nmi = 1.852000 km. The precise fraction answer is 1 213/250 km.

### Decimal Precision

Conversion from one to ten decimal places

• 1 nmi = 1.9 km
• 1 nmi = 1.85 km
• 1 nmi = 1.852 km
• 1 nmi = 1.8520 km
• 1 nmi = 1.85200 km
• 1 nmi = 1.852000 km
• 1 nmi = 1.8520000 km
• 1 nmi = 1.85200000 km
• 1 nmi = 1.852000000 km
• 1 nmi = 1.8520000000 km

## How many kilometers are in a nautical mile?

There are 1.852 kilometers in one nautical mile. A nautical mile is 1.852 times longer than a kilometer. A kilometer is 54.00% of a nautical mile

## Nautical miles to kilometers conversion factor and formulas

Formula

The conversion factor between nautical miles and kilometers is 1.852. This represents the ratio of kilometers per one nautical mile. To calculate the value in kilometers, we can either multiply by the conversion factor or divide by its inverse.

### Multiplication

To convert from nautical miles to kilometers, multiply nautical miles by 1.852.
The formula is expressed as:
nmi × 1.852 = km

### Division

Alternatively we can divide by the inverse conversion factor to get the same result.
The inverse of 1.852 is 1/1.852 or 0.54. To convert from nautical miles to kilometers, divide nautical miles by 0.54.
The formula is expressed as:
nmi ÷ 0.54 = km

Converting nautical miles to kilometers is a conversion between units from separate unit systems - nautical miles are International Hydrographic defined units while kilometers are metric (SI) .

International Hydrographic Unit

The nautical mile is a distance measurement, usually between two geographic points. It is officially defined as being equal to 1,852 meters. The nautical mile, or international nautical mile can be found abbreviated as either M, NM, nmi or nm. Historically the nautical mile was defined as 1/16th of a degree of the earth's latitude. Given this correlation with latitude and longitude, the nautical mile has closely been associated with measurements for navigation. This tradition continues to this day as it remains the unit used to measure distance by the maritime and aviation industries. The prevalent unit of speed over water and air is the knot (nautical miles per hour).

SI Unit

Within the SI (metric) system of measurement, the kilometer is officially defined as being equal to 1,000 meters. It is commonly used as measurement for geographic distances in similar circumstances where a mile would be used in the U.S. Internationally it is spelled 'kilometre' whereas the U.S. spells it 'kilometer'. The symbol for a kilometer is km however k is sometimes used.

## Reverse this conversion

Convert from kilometers to nautical miles instead.

## 1 nautical miles to other length units

### Metric

• 1 nmi = 1.852 km
• 1 nmi = 1,852 m
• 1 nmi = 18,520 dm
• 1 nmi = 185,200 cm
• 1 nmi = 1,852,000 mm
• 1 nmi = 1.852×109 µ
• 1 nmi = 1.852×1012 nm

### Imperial/U.S.

• 1 nmi = 1.151 mi
• 1 nmi = 2,025.372 yd
• 1 nmi = 6,076.115 ft
• 1 nmi = 72,913.386 in

## References and Citations

1. International Hydrographic Organization Resolutions of the International Hydrographic Organization
2. International Bureau of Weights and Measures (BIPM) The International System of Units (SI)

## Nautical miles to kilometers conversion table

nmi km
1 nmi 1.852 km
2 nmi 3.704 km
3 nmi 5.556 km
4 nmi 7.408 km
5 nmi 9.26 km
6 nmi 11.112 km
7 nmi 12.964 km
8 nmi 14.816 km
9 nmi 16.668 km
10 nmi 18.52 km
nmi km
20 nmi 37.04 km
30 nmi 55.56 km
40 nmi 74.08 km
50 nmi 92.6 km
60 nmi 111.12 km
70 nmi 129.64 km
80 nmi 148.16 km
90 nmi 166.68 km
100 nmi 185.2 km
1,000 nmi 1,852 km