# Centimeters to Kilometers Conversion

Enter the length in centimeters below to get the value converted to kilometers.

Results in Kilometers: 1 cm = 1.0E-5 km
Hint: use a scientific notation calculator to convert E notation to decimal

## How to Convert Centimeters to Kilometers

To convert a centimeter measurement to a kilometer measurement, divide the length by the conversion ratio.

Since one kilometer is equal to 100,000 centimeters, you can use this simple formula to convert:

kilometers = centimeters ÷ 100,000

The length in kilometers is equal to the centimeters divided by 100,000.

For example, here's how to convert 500,000 centimeters to kilometers using the formula above.
500,000 cm = (500,000 ÷ 100,000) = 5 km

Our inch fraction calculator can add centimeters and kilometers together, and it also automatically converts the results to US customary, imperial, and SI metric values.

## Centimeters

One centimeter is equal to one-hundredth (1/100) of a meter, which is defined as the distance light travels in a vacuum in a 1/299,792,458 second time interval.

The centimeter, or centimetre, is a multiple of the meter, which is the SI base unit for length. In the metric system, "centi" is the prefix for 10-2. Centimeters can be abbreviated as cm; for example, 1 centimeter can be written as 1 cm.

Metric rulers typically have 30 cm, which are represented by 30 large tick marks. To get a rough idea of the actual length of a centimeter, a standard pencil is just about 1 cm thick.

## Kilometers

One kilometer is equal to 1,000 meters, which are defined as the distance light travels in a vacuum in a 1/299,792,458 second time interval.

The kilometer, or kilometre, is a multiple of the meter, which is the SI base unit for length. In the metric system, "kilo" is the prefix for 103. Kilometers can be abbreviated as km; for example, 1 kilometer can be written as 1 km.

We recommend using a ruler or tape measure for measuring length, which can be found at a local retailer or home center. Rulers are available in imperial, metric, or combination with both values, so make sure you get the correct type for your needs.

Need a ruler? Try our free downloadable and printable rulers, which include both imperial and metric measurements.

## Centimeter to Kilometer Conversion Table

Centimeter measurements converted to kilometers
Centimeters Kilometers
1 cm 0.00001 km
2 cm 0.00002 km
3 cm 0.00003 km
4 cm 0.00004 km
5 cm 0.00005 km
6 cm 0.00006 km
7 cm 0.00007 km
8 cm 0.00008 km
9 cm 0.00009 km
10 cm 0.0001 km
100 cm 0.001 km
1,000 cm 0.01 km
10,000 cm 0.1 km
100,000 cm 1 km

## References

1. Ambler Thompson and Barry N. Taylor, Guide for the Use of the International System of Units (SI), National Institute of Standards and Technology, https://physics.nist.gov/cuu/pdf/sp811.pdf