cm to km Converter

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Convert centimeters to kilometers using the SI chain 1 km = 100,000 cm. Practical when summarising large datasets in centimeters — for instance the total length of cabling in a building survey, or the cumulative distance of small movements logged by a sensor — into a single kilometer headline figure. Browser-local conversion.

Centimeter (cm)
Kilometer (km)

Centimeter (cm) → Kilometer (km)

Quick reference table

Centimeter (cm)Kilometer (km)
1 cm0 km
2 cm0 km
5 cm0.0001 km
10 cm0.0001 km
25 cm0.0003 km
50 cm0.0005 km
100 cm0.001 km

Glossary

Centimeter (cm)

A centimeter is one hundredth of a meter (1 cm = 10 mm = 0.3937 inch). It is the everyday metric unit for clothing sizes, body measurements, paper formats and small object dimensions. Two and a half centimeters approximate one inch; ninety-one centimeters approximate one yard.

Kilometer (km)

A kilometer is one thousand meters (1 km = 0.6214 mile = 0.5400 nautical mile). It is the standard road-distance unit everywhere except the United States, the United Kingdom and a handful of other countries. Marathon distances, highway speeds and geographic distances on most maps use kilometers.

Metric system (SI)

The metric system is a decimal system of measurement built around the meter for length, the kilogram for mass and the second for time, with multiples and submultiples expressed as powers of ten (millimeter, centimeter, kilometer). Adopted in France in 1799 and codified internationally as the International System of Units (SI) in 1960, it is now the official measurement system in nearly every country and the standard in science and engineering worldwide.

Imperial / US Customary system

The imperial system is the historical English system of weights and measures whose length units are the inch, foot, yard and mile (12 in = 1 ft, 3 ft = 1 yd, 1,760 yd = 1 mi). Codified by the British Weights and Measures Act of 1824 and aligned with US Customary by the international yard-and-pound agreement of 1959 (1 inch = 25.4 mm exactly), it is still used in the United States, the United Kingdom and a handful of other countries for everyday distances.

Related tools

Millimeters to Kilometers
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