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Multiple conversions
To convert from Kilometer (km) to Nanometer (nm), use the following formula:
Nanometer (nm)
= 1000 × 109× Kilometer (km)
= 1012× Kilometer (km)
To convert from Kilometer (km) to Micrometer (μm), use the following formula:
Micrometer (μm)
= 1000 × 106× Kilometer (km)
= 109× Kilometer (km)
To convert from Kilometer (km) to Millimeter (mm), use the following formula:
Millimeter (mm)
= 1000 × 1000× Kilometer (km)
= 106× Kilometer (km)
To convert from Kilometer (km) to Centimeter (cm), use the following formula:
Centimeter (cm)
= 1000 × 100× Kilometer (km)
= 105× Kilometer (km)
To convert from Kilometer (km) to Decimeter (dm), use the following formula:
Decimeter (dm)
= 1000 × 10× Kilometer (km)
= 104× Kilometer (km)
To convert from Kilometer (km) to Meter (m), use the following formula:
Meter (m)
= 1000× Kilometer (km)
To convert from Kilometer (km) to Mil (mil), use the following formula:
Mil (mil)
= 1000 × 10.3048 × 12000× Kilometer (km)
= 39370078.740157480315× Kilometer (km)
With 10.3048 is the ratio between the base units Foot (ft) and Meter (m).
To convert from Kilometer (km) to Inch (in), use the following formula:
Inch (in)
= 1000 × 10.3048 × 12× Kilometer (km)
= 39370.078740157480315× Kilometer (km)
With 10.3048 is the ratio between the base units Foot (ft) and Meter (m).
To convert from Kilometer (km) to Yard (yd), use the following formula:
Yard (yd)
= 1000 × 10.3048 × 13× Kilometer (km)
= 1093.6132983377077865× Kilometer (km)
With 10.3048 is the ratio between the base units Foot (ft) and Meter (m).
To convert from Kilometer (km) to US Survey Foot (ft-us), use the following formula:
US Survey Foot (ft-us)
= 1000 × 10.3048 × 11.000002× Kilometer (km)
= 3280.8333333464566667× Kilometer (km)
With 10.3048 is the ratio between the base units Foot (ft) and Meter (m).
To convert from Kilometer (km) to Foot (ft), use the following formula:
Foot (ft)
= 1000 × 10.3048× Kilometer (km)
= 3280.8398950131233596× Kilometer (km)
With 10.3048 is the ratio between the base units Foot (ft) and Meter (m).
To convert from Kilometer (km) to Fathom (fathom), use the following formula:
Fathom (fathom)
= 1000 × 10.3048 × 16× Kilometer (km)
= 546.80664916885389326× Kilometer (km)
With 10.3048 is the ratio between the base units Foot (ft) and Meter (m).
To convert from Kilometer (km) to Mile (mi), use the following formula:
Mile (mi)
= 1000 × 10.3048 × 15280× Kilometer (km)
= 0.62137119223733396962× Kilometer (km)
With 10.3048 is the ratio between the base units Foot (ft) and Meter (m).
To convert from Kilometer (km) to Nautical Mile (nMi), use the following formula:
Nautical Mile (nMi)
= 1000 × 10.3048 × 16076.12× Kilometer (km)
= 0.53995640227861256189× Kilometer (km)
With 10.3048 is the ratio between the base units Foot (ft) and Meter (m).
A kilometer (km) is a unit of length in the metric system, equal to 1,000 meters.
The plural form is kilometers.
The term "kilometer" is composed of two parts: the metric unit "meter" and the Greek prefix "kilo," which comes from the word "khilioi," meaning "thousand."
Thus, a kilometer translates to one thousand meters.
This concept is a fundamental aspect of the decimal-based metric system, established in France during the 1790s. The logical, prefix-based nature of the metric system simplifies conversions, which is a key reason for its widespread adoption.
The kilometer is the official unit of measurement for geographical distance in the vast majority of countries worldwide.
Only a few nations still primarily use the mile for road signage and navigation, most notably:
For international travel, science, and sporting events like marathons and the Olympics, the kilometer is the universally accepted standard.
To understand how far a kilometer is, consider these real-world examples:
This consistent unit of measurement makes it easy to compare everything from everyday travel to distances in space.