Conversion formula

The conversion factor from centimeters to decimeters is 0.1, which means that 1 centimeter is equal to 0.1 decimeters:

1 cm = 0.1 dm

To convert 840 centimeters into decimeters we have to multiply 840 by the conversion factor in order to get the length amount from centimeters to decimeters. We can also form a simple proportion to calculate the result:

1 cm → 0.1 dm

840 cm → L_(dm)

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

L_(dm) = 840 cm × 0.1 dm

L_(dm) = 84 dm

The final result is:

840 cm → 84 dm

We conclude that 840 centimeters is equivalent to 84 decimeters:

840 centimeters = 84 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.011904761904762 × 840 centimeters.

Another way is saying that 840 centimeters is equal to 1 ÷ 0.011904761904762 decimeters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that eight hundred forty centimeters is approximately eighty-four decimeters:

840 cm ≅ 84 dm

An alternative is also that one decimeter is approximately zero point zero one two times eight hundred forty centimeters.

Conversion table

centimeters to decimeters chart

For quick reference purposes, below is the conversion table you can use to convert from centimeters to decimeters