ConvBolt — Unit ConverterCentimeters to Kilometers Converter
Converting centimeters to kilometers is a multiplication by a fixed factor: 1 cm = 1.0000e-5 km. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one centimeter works out to 1.0000e-5 km, the kilometer is the far smaller unit of the two: a figure given in kilometer always carries a smaller number than the same measurement in centimeter. A chart drawn in cm can hide that, so check which label the axis uses before you compare two readings.
Technical documentation is the other common source — a datasheet drawn up in centimeters often has to be re-expressed in kilometers for a supplier or a regulator who works in the other system.
The conversion factor used here is 1.0000e-5 km per centimeter (7 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 cm a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 100000 cm per km, the exact reciprocal, so a round trip through both pages returns your original number.
Centimeters to Kilometers formula
Use this formula to convert any centimeter value to kilometers:
Worked example: 100 cm × 1.0000e-5 = 0.001 km.
Centimeters to Kilometers conversion table
| Centimeters (cm) | Kilometers (km) |
|---|---|
| 0.5 cm | 5.0000e-6 km |
| 1 cm | 1.0000e-5 km |
| 2 cm | 2.0000e-5 km |
| 5 cm | 5.0000e-5 km |
| 10 cm | 0.0001 km |
| 20 cm | 0.0002 km |
| 50 cm | 0.0005 km |
| 100 cm | 0.001 km |
| 500 cm | 0.005 km |
| 1000 cm | 0.01 km |
How to convert centimeters to kilometers
Multiply the centimeter value by 1.0000e-5 to get the equivalent in kilometers. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the Kilometers to Centimeters converter instead of dividing by hand; both pages use the same source factors. For every other cm conversion in one place, see the cm conversion hub.
Frequently asked questions
How many kilometers are in 1 centimeter?
1 centimeter = 1.0000e-5 km.
What is 100 centimeters in kilometers?
100 cm = 0.001 km.
Is converting centimeters to kilometers the same as kilometers to centimeters?
No — the direction changes the multiplier. The reverse conversion (1 km = 100000 cm) is on the Kilometers to Centimeters page.
Related conversions
Try the ConvBolt Unit Converter for any other length unit, browse the Length conversions, or read our conversion guides.