Convert Kilometers to Centimeters
1 kilometer is 100,000 cm. One kilometer is exactly 100000 centimeters.
One kilometer is 100000 centimeters. To convert kilometers to centimeters, multiply by 100000; to go the other way, divide by 100000 or multiply by 1.0000 × 10^-5. The factor is exact rather than rounded: it follows from NIST. One thousand meters, and about 0.621 miles.
Factor checked against the defining standard · How we check
- Kilometers × 100000
1 * 100000100,000 cm
1 kilometer in every length unit
| Unit | Value | Exact factor |
|---|---|---|
| inches | 39,370.07874 in | × 39,370.0787402 |
| feet | 3,280.839895 ft | × 3,280.83989501 |
| yards | 1,093.613298 yd | × 1,093.61329834 |
| miles | 0.6213711922 mi | × 0.621371192237 |
| millimeters | 1,000,000 mm | × 1,000,000 |
| decimetres | 10,000 dm | × 10,000 |
| centimeters | 100,000 cm | × 100,000 |
| meters | 1,000 m | × 1,000 |
| kilometers (as entered) | 1 km | — |
| nautical miles | 0.5399568035 nmi | × 0.539956803456 |
| micrometers | 1,000,000,000 µm | × 1,000,000,000 |
| nanometers | 1,000,000,000,000 nm | × 1,000,000,000,000 |
| thou | 39,370,078.74 thou | × 39,370,078.7402 |
Factors are entered by hand from NIST rather than derived from a units library, so the ones that terminate are exact rather than rounded.
The same converter answers this pair however it is written: kilometres to centimetres is the British spelling of the same units — the metre and the litre are spelled that way outside the United States and the quantity does not change.
How do you convert kilometers to centimeters? The converter and the working
- 1.Take the measurement in kilometers.
- 2.Multiply by 100000 — that is how many centimeters fit in one kilometer.
- 3.To go back the other way, divide by 100000, or multiply by 1.0000 × 10^-5.
Worked example: 25 kilometers to centimeters
- Formula
- km × 100000 = cm
- Arithmetic
- 25 × 100000 = 2,500,000 cm
- Answer
- 25 km = 2,500,000 cm
The factor is exact, so this figure is exact too — only the display is rounded.
Kilometers to centimeters conversion table
| 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 |
| 12 km | 1,200,000 cm |
| 15 km | 1,500,000 cm |
| 20 km | 2,000,000 cm |
| 25 km | 2,500,000 cm |
| 50 km | 5,000,000 cm |
| 100 km | 10,000,000 cm |
| 200 km | 20,000,000 cm |
| 300 km | 30,000,000 cm |
| 500 km | 50,000,000 cm |
| 1000 km | 100,000,000 cm |
| 2000 km | 200,000,000 cm |
| 5000 km | 500,000,000 cm |
| 10000 km | 1,000,000,000 cm |
What is a kilometer?
One thousand meters, and about 0.621 miles.
What is a centimeter?
One hundredth of a meter, and the unit most of the world states height in.
How many centimeters are in a kilometer?
One kilometer is 100000 centimeters, exactly. Going the other way, one centimeter is 1.0000 × 10^-5 kilometers. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every length unit here
The whole group — 13 units with their symbols and the size of each one in meters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a kilometer.
Source: NIST — international yard and pound agreement (inch = 25.4 mm exactly)
Cite this page
- APA
- Rule Calculator. (2026). Convert Kilometers to centimeters. Rule Calculator. https://rulecalculators.com/convert/kilometer-to-centimeter
- MLA
- "Convert Kilometers to centimeters." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/kilometer-to-centimeter.
- Chicago
- Rule Calculator. "Convert Kilometers to centimeters." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/kilometer-to-centimeter.
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Questions people actually ask
- How many centimeters are in a kilometer?
- 100000. One hundredth of a meter, and the unit most of the world states height in.
- How do I convert centimeters back to kilometers?
- Divide by 100000, or multiply by 1.0000 × 10^-5 — they are the same operation.
Other length conversions
Centimeters to kilometers — the same conversion the other way.