Convert kilometers to centimeters
Converting kilometers to centimeters is a common length task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 km equals 100,000 cm, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert kilometers to centimeters
To convert kilometers to centimeters, multiply the number of kilometers by 100,000. For example, 10 km × 100,000 = 1,000,000 cm.
cm = km × 100,000
- Write down the value in kilometers you want to convert.
- Multiply it by 100,000 (the exact km→cm factor).
- The result is your value in centimeters. Check it below with the converter or the table.
Conversion table
Common values of kilometers and their equivalents in centimeters:
| km | cm |
|---|---|
| 1 | 100,000 |
| 2 | 200,000 |
| 3 | 300,000 |
| 4 | 400,000 |
| 5 | 500,000 |
| 10 | 1,000,000 |
| 20 | 2,000,000 |
| 25 | 2,500,000 |
| 50 | 5,000,000 |
| 100 | 10,000,000 |
| 250 | 25,000,000 |
| 500 | 50,000,000 |
About these units
Kilometer (km). A kilometer equals 1,000 meters and is the standard metric unit for road distances and geography. One kilometer is about 0.62 miles or a 12-minute walk.
Centimeter (cm). A centimeter is one hundredth of a meter, roughly the width of a fingernail. It is the everyday unit for body measurements, clothing sizes and small objects in metric countries.
Frequently asked questions
How do I convert kilometers to centimeters?
To convert kilometers to centimeters, multiply the number of kilometers by 100,000. For example, 10 km × 100,000 = 1,000,000 cm. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many centimeters are in 1 kilometer?
1 km = 100,000 cm. That is the fixed relationship used by this converter and by international standards.
How many kilometers are in 1 centimeter?
1 cm = 0.00001 km. If you are converting in the opposite direction, use our Centimeter to Kilometer converter for the dedicated table and FAQ.
Is the kilometers to centimeters conversion exact?
Yes. Both units are defined by international agreement, so the factor of 100,000 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is kilometer used for?
A kilometer equals 1,000 meters and is the standard metric unit for road distances and geography. One kilometer is about 0.62 miles or a 12-minute walk.