# Convert Millimeters to Inches

Enter the length in millimeters below to get the value converted to inches.

**Results in Inches:**

1 mm ≈

^{3}/

_{64}"

## How to Convert Millimeters to Inches

To convert a millimeter measurement to a inch measurement, multiply the length by the conversion ratio. One millimeter is equal to 0.03937 inches, so use this simple formula to convert:

The length in inches is equal to the millimeters multiplied by 0.03937.

**For example,**here's how to convert 5 millimeters to inches using the formula above.

Our inch fraction calculator can add millimeters and inches together and it also automatically converts the results to US customary, imperial and SI metric values.

Millimeters and inches are both units used to measure length. Keep reading to learn more about each unit of measure.

## Millimeters

One millimeter is equal to one-thousandth (1/1,000) of a meter, which is defined as the distance light travels in a vacuum in a ^{1}/_{299,792,458} second time interval.

The millimeter, or millimetre, is a multiple of the meter, which is the SI base unit for length. In the metric system, "milli" is the prefix for 10^{-3}. Millimeters can be abbreviated as *mm*, for example 1 millimeter can be written as 1 mm.

Millimeters are often represented by the smallest ticks on most metric rulers. To get a reference point of the size, the thickness of a US dime is 1.35mm.

## Inches

An inch is a unit of linear length measure equal to ^{1}/_{12} of a foot or ^{1}/_{36} of a yard.
Because the international yard is legally defined to be equal to exactly 0.9144 meters, one inch is equal to 2.54 centimeters.

The inch is a US customary and imperial unit of length. Inches can be abbreviated as *in*, for example 1 inch can be written as 1 in.

Inches can also be denoted using the *″* symbol, otherwise know as a double-prime.
Often a double-quote (") is used instead of a double-prime for convenience.
Using the double-prime, *1 in* can be written as 1″.

The standard ruler has 12", and are a common measuring tool for measuring inches. They are also often measured using tape measures which commonly come in lengths from 6' - 35'. Other types of measuring devices include scales, calipers, measuring wheels, micrometers, yardsticks, and even lasers.

We recommend using a ruler or tape measure for measuring length, which can be found at a local retailer or home center. Rulers are available in imperial, metric, or combination with both values, so make sure you get the correct type for your needs.

If you need a ruler you can also download and print our free printable rulers, which include both imperial and metric measurements.

## Millimeter Measurements and Equivalent Inch Conversions

Millimeters | Inches (decimal) | Inches (fraction) |
---|---|---|

1 mm | 0.03937" | 3/64" |

2 mm | 0.07874" | 5/64" |

3 mm | 0.11811" | 1/8" |

4 mm | 0.15748" | 5/32" |

5 mm | 0.19685" | 13/64" |

6 mm | 0.23622" | 15/64" |

7 mm | 0.275591" | 9/32" |

8 mm | 0.314961" | 5/16" |

9 mm | 0.354331" | 23/64" |

10 mm | 0.393701" | 25/64" |

11 mm | 0.433071" | 7/16" |

12 mm | 0.472441" | 15/32" |

13 mm | 0.511811" | 33/64" |

14 mm | 0.551181" | 35/64" |

15 mm | 0.590551" | 19/32" |

16 mm | 0.629921" | 5/8" |

17 mm | 0.669291" | 43/64" |

18 mm | 0.708661" | 45/64" |

19 mm | 0.748031" | 3/4" |

20 mm | 0.787402" | 25/32" |

21 mm | 0.826772" | 53/64" |

22 mm | 0.866142" | 55/64" |

23 mm | 0.905512" | 29/32" |

24 mm | 0.944882" | 15/16" |

25 mm | 0.984252" | 63/64" |

26 mm | 1.0236" | 1 1/32" |

27 mm | 1.063" | 1 1/16" |

28 mm | 1.1024" | 1 7/64" |

29 mm | 1.1417" | 1 9/64" |

30 mm | 1.1811" | 1 3/16" |

31 mm | 1.2205" | 1 7/32" |

32 mm | 1.2598" | 1 17/64" |

33 mm | 1.2992" | 1 19/64" |

34 mm | 1.3386" | 1 11/32" |

35 mm | 1.378" | 1 3/8" |

36 mm | 1.4173" | 1 27/64" |

37 mm | 1.4567" | 1 29/64" |

38 mm | 1.4961" | 1 1/2" |

39 mm | 1.5354" | 1 17/32" |

40 mm | 1.5748" | 1 37/64" |

## More Millimeter Length Conversions

**US Customary & Imperial Units**

- Convert to Miles
- 1 mm is equal to 6.2137E-7 miles
- Convert to Yards
- 1 mm is equal to 0.001094 yards
- Convert to Feet
- 1 mm is equal to 0.003281 feet

**SI Units**

- Convert to Kilometers
- 1 mm is equal to 1.0E-6 kilometers
- Convert to Meters
- 1 mm is equal to 0.001 meters
- Convert to Centimeters
- 1 mm is equal to 0.1 centimeters
- Convert to Micrometers
- 1 mm is equal to 1,000 micrometers
- Convert to Nanometers
- 1 mm is equal to 1,000,000 nanometers