Conversion formula

The conversion factor from decimeters to centimeters is 10, which means that 1 decimeter is equal to 10 centimeters:

1 dm = 10 cm

To convert 40 decimeters into centimeters we have to multiply 40 by the conversion factor in order to get the length amount from decimeters to centimeters. We can also form a simple proportion to calculate the result:

1 dm → 10 cm

40 dm → L_(cm)

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

L_(cm) = 40 dm × 10 cm

L_(cm) = 400 cm

The final result is:

40 dm → 400 cm

We conclude that 40 decimeters is equivalent to 400 centimeters:

40 decimeters = 400 centimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 centimeter is equal to 0.0025 × 40 decimeters.

Another way is saying that 40 decimeters is equal to 1 ÷ 0.0025 centimeters.

Approximate result

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

40 dm ≅ 400 cm

An alternative is also that one centimeter is approximately zero point zero zero three times forty decimeters.

Conversion table

decimeters to centimeters chart

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