Convert Kilometers to Centimeters

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

Results in Centimeters:
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1 km = 100,000 cm

How to Convert Kilometers to Centimeters

Tape measures can be used to measure units of length, and a calculator can be used to convert to another unit

To convert a kilometer measurement to a centimeter measurement, multiply the length by the conversion ratio. One kilometer is equal to 100,000 centimeters, so use this simple formula to convert:

centimeters = kilometers × 100,000

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

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

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

Kilometers and centimeters are both units used to measure length. Keep reading to learn more about each unit of measure.


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.[1]

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.


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 1cm thick.

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.

If you need a ruler you can also download and print our free printable rulers, which include both imperial and metric measurements.

Kilometer Measurements and Equivalent Centimeter Conversions

Common kilometer values converted to the equivalent centimeter value
Kilometers Centimeters
1 km 100,000 cm
2 km 200,000 cm
3 km 300,000 cm
4 km 400,000 cm
5 km 500,000 cm
6 km 600,000 cm
7 km 700,000 cm
8 km 800,000 cm
9 km 900,000 cm
10 km 1,000,000 cm
11 km 1,100,000 cm
12 km 1,200,000 cm
13 km 1,300,000 cm
14 km 1,400,000 cm
15 km 1,500,000 cm
16 km 1,600,000 cm
17 km 1,700,000 cm
18 km 1,800,000 cm
19 km 1,900,000 cm
20 km 2,000,000 cm
21 km 2,100,000 cm
22 km 2,200,000 cm
23 km 2,300,000 cm
24 km 2,400,000 cm
25 km 2,500,000 cm
26 km 2,600,000 cm
27 km 2,700,000 cm
28 km 2,800,000 cm
29 km 2,900,000 cm
30 km 3,000,000 cm
31 km 3,100,000 cm
32 km 3,200,000 cm
33 km 3,300,000 cm
34 km 3,400,000 cm
35 km 3,500,000 cm
36 km 3,600,000 cm
37 km 3,700,000 cm
38 km 3,800,000 cm
39 km 3,900,000 cm
40 km 4,000,000 cm


  1. Ambler Thompson and Barry N. Taylor, Guide for the Use of the International System of Units (SI), National Institute of Standards and Technology,

More Kilometer Length Conversions

US Customary & Imperial Units
Convert to Miles
1 km is equal to 0.621371 miles
Convert to Yards
1 km is equal to 1,093.61 yards
Convert to Feet
1 km is equal to 3,280.84 feet
Convert to Inches
1 km is equal to 39,370.1 inches
SI Units
Convert to Meters
1 km is equal to 1,000 meters
Convert to Millimeters
1 km is equal to 1,000,000 millimeters
Convert to Micrometers
1 km is equal to 1,000,000,000 micrometers
Convert to Nanometers
1 km is equal to 1,000,000,000,000 nanometers