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 820 millimeters into decimeters we have to multiply 820 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

820 mm → L_(dm)

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

L_(dm) = 820 mm × 0.01 dm

L_(dm) = 8.2 dm

The final result is:

820 mm → 8.2 dm

We conclude that 820 millimeters is equivalent to 8.2 decimeters:

820 millimeters = 8.2 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.1219512195122 × 820 millimeters.

Another way is saying that 820 millimeters is equal to 1 ÷ 0.1219512195122 decimeters.

Approximate result

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

820 mm ≅ 8.2 dm

An alternative is also that one decimeter is approximately zero point one two two times eight hundred twenty 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