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 240 millimeters into decimeters we have to multiply 240 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

240 mm → L_(dm)

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

L_(dm) = 240 mm × 0.01 dm

L_(dm) = 2.4 dm

The final result is:

240 mm → 2.4 dm

We conclude that 240 millimeters is equivalent to 2.4 decimeters:

240 millimeters = 2.4 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.41666666666667 × 240 millimeters.

Another way is saying that 240 millimeters is equal to 1 ÷ 0.41666666666667 decimeters.

Approximate result

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

240 mm ≅ 2.4 dm

An alternative is also that one decimeter is approximately zero point four one seven times two hundred forty 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