Km to cm
One km equals 100000 cm. Type any number and the answer appears as you type — the maths happens in your browser.
Result
The same value in every unit
| Unit | Value |
|---|
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Common values
| km | cm |
|---|---|
| 1 km | 100000 cm |
| 2 km | 200000 cm |
| 3 km | 300000 cm |
| 5 km | 500000 cm |
| 10 km | 1000000 cm |
| 15 km | 1500000 cm |
| 20 km | 2000000 cm |
| 25 km | 2500000 cm |
| 50 km | 5000000 cm |
| 100 km | 10000000 cm |
| 500 km | 50000000 cm |
| 1000 km | 100000000 cm |
How to use
- Enter the number of km in the field.
- The result in cm updates on every keystroke.
- Use the table below for the values people look up most often.
Formula and reverse conversion
The formula
To convert by hand: cm = km × 100000. Going back the other way, one cm is 0.00001 km.
Metric units differ by powers of ten
Both units belong to the metric system, so the conversion is a shift of the decimal point: the factor is a power of ten and nothing is lost to rounding.
cm = km × 100000
Frequently asked questions
How many cm are in one km?
One km is 100000 cm.
How do I convert km to cm?
Multiply by the factor: cm = km × 100000.
Is the result exact?
The factors are the exact legal definitions, and up to ten significant digits are kept in the answer. Rounding happens only in the display.
How do I convert cm back to km?
One cm is 0.00001 km — or open the reverse page linked below.