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 821 centimeters into kilometers we have to multiply 821 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

821 cm → L_(km)

Solve the above proportion to obtain the length L in kilometers:

L_(km) = 821 cm × 1.0E-5 km

L_(km) = 0.00821 km

The final result is:

821 cm → 0.00821 km

We conclude that 821 centimeters is equivalent to 0.00821 kilometers:

821 centimeters = 0.00821 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 121.80267965895 × 821 centimeters.

Another way is saying that 821 centimeters is equal to 1 ÷ 121.80267965895 kilometers.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that eight hundred twenty-one centimeters is approximately zero point zero zero eight kilometers:

821 cm ≅ 0.008 km

An alternative is also that one kilometer is approximately one hundred twenty-one point eight zero three times eight hundred 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