## Conversion formula

The conversion factor from decimeters to millimeters is 100, which means that 1 decimeter is equal to 100 millimeters:

1 dm = 100 mm

To convert 6.9 decimeters into millimeters we have to multiply 6.9 by the conversion factor in order to get the length amount from decimeters to millimeters. We can also form a simple proportion to calculate the result:

1 dm → 100 mm

6.9 dm → L(mm)

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

L(mm) = 6.9 dm × 100 mm

L(mm) = 690 mm

The final result is:

6.9 dm → 690 mm

We conclude that 6.9 decimeters is equivalent to 690 millimeters:

6.9 decimeters = 690 millimeters

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 0.0014492753623188 × 6.9 decimeters.

Another way is saying that 6.9 decimeters is equal to 1 ÷ 0.0014492753623188 millimeters.

## Approximate result

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

6.9 dm ≅ 690 mm

An alternative is also that one millimeter is approximately zero point zero zero one times six point nine decimeters.

## Conversion table

### decimeters to millimeters chart

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

decimeters (dm) millimeters (mm)
7.9 decimeters 790 millimeters
8.9 decimeters 890 millimeters
9.9 decimeters 990 millimeters
10.9 decimeters 1090 millimeters
11.9 decimeters 1190 millimeters
12.9 decimeters 1290 millimeters
13.9 decimeters 1390 millimeters
14.9 decimeters 1490 millimeters
15.9 decimeters 1590 millimeters
16.9 decimeters 1690 millimeters