Kilometers to Centimeters
An instant kilometers-to-centimeters converter, with the formula and a reference table below.
| Kilometers | Centimeters |
|---|---|
| 1 km | 100000 cm |
| 2 km | 200000 cm |
| 3 km | 300000 cm |
| 5 km | 500000 cm |
| 10 km | 1000000 cm |
| 25 km | 2500000 cm |
| 50 km | 5000000 cm |
| 100 km | 10000000 cm |
How to use
- Enter a value in the Kilometers field.
- The Centimeters figure appears immediately — no button to press.
- Typing in the Centimeters field converts back to Kilometers the same way.
- Use the reference table for the values that come up most often.
Kilometers to Centimeters formula
Converting kilometers to centimeters is a single multiplication by 100000.
cm = km × 100000
Put another way, one kilometer is exactly 100,000 centimeters.
Why this factor: the kilometer and the centimeter are both defined against the meter, so dividing one definition by the other gives 100000 directly. Both definitions are set out in full below.
To go the other way, divide by 100000 — or use the Centimeters to Kilometers converter, which is the same calculation reversed.
Worked example
Given 100 km, multiplying by 100000 yields 10000000 cm.
100 km × 100000 = 10000000 cm
The converter above does this for any value you type, in either direction.
What is a kilometer?
A kilometer is 1,000 meters, the standard unit for road distances and geography in most of the world.
Definition: Exactly 1,000 meters by SI prefix definition — 'kilo' means 10³.
Where it is used: Road signs, running and cycling distances, and map scales outside the US and UK.
What is a centimeter?
A centimeter is one hundredth of a meter, the everyday metric unit for body and object measurements.
Definition: Exactly 0.01 meter by SI prefix definition.
Where it is used: Height, clothing sizes, rainfall, paper and screen dimensions across the metric world.
Kilometers vs Centimeters
The kilometer and the centimeter belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many centimeters are in a kilometer?
One kilometer equals 100000 centimeters.
What is the formula to convert kilometers to centimeters?
Multiply the number of kilometers by 100000. To reverse it, divide by 100000 instead.
How do I convert centimeters back to kilometers?
Divide by 100000, which is the same as multiplying by 1e-05.
How many centimeters are in 10 kilometers?
10 km works out to 1000000 cm.
How is the kilometer defined?
Exactly 1,000 meters by SI prefix definition — 'kilo' means 10³.