Centimeters to Kilometers
Convert centimeters to kilometers instantly. 1 cm = 1e-05 km. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert centimeters to kilometers
To convert centimeters to kilometers, divide by 100000 (multiply by 1e-05). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
km = cm × 1e-05
Centimeters to Kilometers conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Centimeters | Kilometers |
|---|---|
| 1 cm | 1e-05 km |
| 2 cm | 2e-05 km |
| 3 cm | 3e-05 km |
| 5 cm | 5e-05 km |
| 10 cm | 0.0001 km |
| 20 cm | 0.0002 km |
| 25 cm | 0.00025 km |
| 50 cm | 0.0005 km |
| 100 cm | 0.001 km |
| 500 cm | 0.005 km |
| 1,000 cm | 0.01 km |
What is a centimeter?
A hundredth of a metre. The everyday metric unit for body measurements and paper sizes.
What is a kilometer?
A thousand metres. The standard road-distance unit almost everywhere except the US and UK.
The formula
km = cm × 1e-05
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Centimeters to Kilometers
- Type the number of centimeters you want to convert.
- Read the result in kilometers straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked kilometers to centimeters page.
Centimeters to Kilometers — frequently asked questions
How many kilometers are in a centimeter?
One centimeter equals 1e-05 km. km = cm × 1e-05
What is the formula to convert centimeters to kilometers?
The formula is km = cm × 1e-05. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert kilometers back to centimeters?
Divide instead of multiplying: one kilometer is 100000 cm. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this centimeters to kilometers free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error