Conversion formula

The conversion factor from millimeters to decimeters is 0.01, which means that 1 millimeter is equal to 0.01 decimeters:

1 mm = 0.01 dm

To convert 800 millimeters into decimeters we have to multiply 800 by the conversion factor in order to get the length amount from millimeters to decimeters. We can also form a simple proportion to calculate the result:

1 mm → 0.01 dm

800 mm → L_(dm)

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

L_(dm) = 800 mm × 0.01 dm

L_(dm) = 8 dm

The final result is:

800 mm → 8 dm

We conclude that 800 millimeters is equivalent to 8 decimeters:

800 millimeters = 8 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.125 × 800 millimeters.

Another way is saying that 800 millimeters is equal to 1 ÷ 0.125 decimeters.

Approximate result

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

800 mm ≅ 8 dm

An alternative is also that one decimeter is approximately zero point one two five times eight hundred millimeters.

Conversion table

millimeters to decimeters chart

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