Conversion formula

The conversion factor from meters to decimeters is 10, which means that 1 meter is equal to 10 decimeters:

1 m = 10 dm

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

1 m → 10 dm

40 m → L_(dm)

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

L_(dm) = 40 m × 10 dm

L_(dm) = 400 dm

The final result is:

40 m → 400 dm

We conclude that 40 meters is equivalent to 400 decimeters:

40 meters = 400 decimeters

Alternative conversion

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

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

Approximate result

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

40 m ≅ 400 dm

An alternative is also that one decimeter is approximately zero point zero zero three times forty meters.

Conversion table

meters to decimeters chart

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