Unit Converter
Conversion formula
The conversion factor from centimeters to kilometers is 1.0E-5, which means that 1 centimeter is equal to 1.0E-5 kilometers:
1 cm = 1.0E-5 km
To convert 21 centimeters into kilometers we have to multiply 21 by the conversion factor in order to get the length amount from centimeters to kilometers. We can also form a simple proportion to calculate the result:
1 cm → 1.0E-5 km
21 cm → L(km)
Solve the above proportion to obtain the length L in kilometers:
L(km) = 21 cm × 1.0E-5 km
L(km) = 0.00021 km
The final result is:
21 cm → 0.00021 km
We conclude that 21 centimeters is equivalent to 0.00021 kilometers:
21 centimeters = 0.00021 kilometers
Alternative conversion
We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 4761.9047619048 × 21 centimeters.
Another way is saying that 21 centimeters is equal to 1 ÷ 4761.9047619048 kilometers.
Approximate result
For practical purposes we can round our final result to an approximate numerical value. We can say that twenty-one centimeters is approximately zero kilometers:
21 cm ≅ 0 km
An alternative is also that one kilometer is approximately four thousand seven hundred sixty-one point nine zero five times twenty-one centimeters.
Conversion table
centimeters to kilometers chart
For quick reference purposes, below is the conversion table you can use to convert from centimeters to kilometers
centimeters (cm) | kilometers (km) |
---|---|
22 centimeters | 0 kilometers |
23 centimeters | 0 kilometers |
24 centimeters | 0 kilometers |
25 centimeters | 0 kilometers |
26 centimeters | 0 kilometers |
27 centimeters | 0 kilometers |
28 centimeters | 0 kilometers |
29 centimeters | 0 kilometers |
30 centimeters | 0 kilometers |
31 centimeters | 0 kilometers |