## Unit Converter

## Conversion formula

The conversion factor from inches to millimeters is 25.4, which means that 1 inch is equal to 25.4 millimeters:

1 in = 25.4 mm

To convert 1 inches into millimeters we have to multiply 1 by the conversion factor in order to get the length amount from inches to millimeters. We can also form a simple proportion to calculate the result:

1 in → 25.4 mm

1 in → L_{(mm)}

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

L_{(mm)} = 1 in × 25.4 mm

L_{(mm)} = 25.4 mm

The final result is:

1 in → 25.4 mm

We conclude that **1 inches is equivalent to 25.4 millimeters**:

1 inches = 25.4 millimeters

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case **1 millimeter is equal to 0.039370078740157 × 1 inches**.

Another way is saying that *1 inches is equal to 1 ÷ 0.039370078740157 millimeters*.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that **one inches is approximately twenty-five point four millimeters**:

1 in ≅ 25.4 mm

An alternative is also that *one millimeter is approximately zero point zero three nine times one inches*.

## Conversion table

### inches to millimeters chart

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

inches (in) | millimeters (mm) |
---|---|

2 inches | 50.8 millimeters |

3 inches | 76.2 millimeters |

4 inches | 101.6 millimeters |

5 inches | 127 millimeters |

6 inches | 152.4 millimeters |

7 inches | 177.8 millimeters |

8 inches | 203.2 millimeters |

9 inches | 228.6 millimeters |

10 inches | 254 millimeters |

11 inches | 279.4 millimeters |