## Unit Converter

## Conversion formula

The conversion factor from kilometers to millimeters is 1000000, which means that 1 kilometer is equal to 1000000 millimeters:

1 km = 1000000 mm

To convert 4 kilometers into millimeters we have to multiply 4 by the conversion factor in order to get the length amount from kilometers to millimeters. We can also form a simple proportion to calculate the result:

1 km → 1000000 mm

4 km → L_{(mm)}

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

L_{(mm)} = 4 km × 1000000 mm

L_{(mm)} = 4000000 mm

The final result is:

4 km → 4000000 mm

We conclude that **4 kilometers is equivalent to 4000000 millimeters**:

4 kilometers = 4000000 millimeters

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case **1 millimeter is equal to 2.5E-7 × 4 kilometers**.

Another way is saying that *4 kilometers is equal to 1 ÷ 2.5E-7 millimeters*.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that **four kilometers is approximately four million millimeters**:

4 km ≅ 4000000 mm

An alternative is also that *one millimeter is approximately zero times four kilometers*.

## Conversion table

### kilometers to millimeters chart

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

kilometers (km) | millimeters (mm) |
---|---|

5 kilometers | 5000000 millimeters |

6 kilometers | 6000000 millimeters |

7 kilometers | 7000000 millimeters |

8 kilometers | 8000000 millimeters |

9 kilometers | 9000000 millimeters |

10 kilometers | 10000000 millimeters |

11 kilometers | 11000000 millimeters |

12 kilometers | 12000000 millimeters |

13 kilometers | 13000000 millimeters |

14 kilometers | 14000000 millimeters |