Length / cm → km
Convert Centimeters to Kilometers
From a small measurement to a long distance. Move between metric and imperial units. Convert Centimeters (cm) to Kilometers (km). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Kilometers to Centimeters →
How to convert centimeters to kilometers
Length conversion changes the unit of a distance. Area and volume need squared and cubed factors; this calculator does not convert square feet or cubic feet.
Use x for the value in cm, b for the intermediate value in m, and y for the result in km.
km = cm × 0.01 ÷ 1000
Worked examples
10 cm ≈ 0.0001 km
Step 1: (10 × 0.01) ≈ 0.1 m.
Step 2: 0.1 ÷ 1000 ≈ 0.0001 km.20 cm ≈ 0.0002 km
Step 1: (20 × 0.01) ≈ 0.2 m.
Step 2: 0.2 ÷ 1000 ≈ 0.0002 km.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Centimeters
A centimeter is one hundredth of a meter. It is often used for body measurements, product dimensions, and clothing sizes.
About Kilometers
A kilometer is 1,000 meters. It is useful for road distances and routes; it measures distance rather than speed.
Definitions and sources
Use consistent length units when carrying dimensions into construction calculations.
Centimeters to kilometers reference table
| Centimeters (cm) | Kilometers (km) |
|---|---|
| 1 | 0.00001 |
| 5 | 0.00005 |
| 10 | 0.0001 |
| 25 | 0.00025 |
| 50 | 0.0005 |
| 100 | 0.001 |
| 1000 | 0.01 |
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