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### Convert Inch to Millimetre

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**Conversion of an inch to millimetre**: Inch & millimetre are units of measurement of length and distance in the metric system. 1 inch (in) = 25.4 millimetres (mm). To convert inch to millimetres, multiply the given value in inches by 25.4. The resultant value will be the value in millimetres

Inches

Millimeters

**What is an Inch?**

Inch is a unit of measurement and is denoted as ‘in’ or simply by the symbol “. Some of the common uses include measuring the length of the screen of a smart TV screen, the height of a person, the size of a tyre and so on.

**What is a Millimetre?**

In the International System of Units (SI), a millimetre is a unit of length equal to one-thousandth of a metre. It is denoted as ‘mm’ in short.

Common usage:

- Used to measure the size of the dial of a wristwatch
- used to measure the size of a diamond
- Used to measure the size of a coin

**How to convert Inch to Millimetre?**

To convert the inch to the millimetre, multiply the required inches by 25.4 to get the value in millimetres. As

1 in = 25.4 mm.

**The formula to convert inch to millimetre is given below: **

X in = X × 25.4 mm

where X is the value of inches.

**Examples of Inch to Millimetre conversions**

**Problem 1**: Convert 500 inches to millimetres.

**Solution** 1:

Step 1: The given inches is 500.

Step 2: To convert 500 inches to millimetres, substitute the given values at the required places in the formula. Hence,

Formula,

X in = X × 25.4 mm

500 in = 25.4 ×500 mm

= 12700 mm

Therefore, 500 inches is 12700 millimetres.

**Problem 2**: Convert 10 inches to millimetres.

**Solution** 2:

Step 1: The given inches is 10.

Step 2: To convert 10 inches to millimetres, substitute the values at the required places in the formula. Hence,

X in = X × 25.4 mm

10 in = 10×25.4 mm

= 254 mm

Therefore, 10 inches is 254 millimetres.

**Problem 3**: Convert 15 inches to millimetres.**Solution3 :**

Step 1: The given inches is 15.

Step 2: To convert 15 inches to millimetres, substitute the values at the required places in the formula. Hence,

X in = X × 25.4 mm

15 in = 15 × 25.4 mm

= 381 mm

Therefore, 15 inches is 381 mm.

**Problem 4**: Convert 20 inches to millimetres.**Solution** 4:

Step 1: The given inches is 20.

Step 2: To convert 20 inches to millimetres, substitute the values at the required places in the formula. Hence,

X in = X × 25.4 mm

20 in = 20 × 25.4 mm

= 508 mm

Therefore, 20 inches is 508 millimetres.

**Problem 5**: Convert 30 inches to millimetres.

**Solution** 5:

Step 1: The given inches is 30.

Step 2: To convert 30 inches to millimetres, substitute the values at the required places in the formula. Hence,

X in = X × 25.4 mm

30 in = 30 × 25.4 mm

= 762 mm

Therefore, 30 inches is 762 millimetres.

**Inch (in) to Millimetre (mm)conversion table**

Inch (in) | Millimetre (mm) | Conversion of Inch to Millimetre (in to mm) |

1 in | 25.4 mm | 1 in is 25.4 mm |

2 in | 50.8 mm | 2 in is 50.8 mm |

3 in | 76.2 mm | 3 in is 76.2 mm |

4 in | 101.6 mm | 4 in is 101.6 mm |

5 in | 127 mm | 5 in is 127 mm |

6 in | 152.4 mm | 6 in is 152.4 mm |

7 in | 177.8 mm | 7 in is 177.8 mm |

8 in | 203.2 mm | 8 in is 203.2 mm |

9 in | 228.6 mm | 9 in is 228.6 mm |

10 in | 254 mm | 10 in is 254 mm |

11 in | 279.4 mm | 11 in is 279.4 mm |

12 in | 304.8 mm | 12 in is 304.8 mm |

13 in | 330.2 mm | 13 in is 330.2 mm |

14 in | 355.6 mm | 14 in is 355.6 mm |

15 in | 381 mm | 15 in is 381 mm |

16 in | 406.4 mm | 16 in is 406.4 mm |

17 in | 431.8 mm | 17 in is 431.8 mm |

18 in | 457.2 mm | 18 in is 457.2 mm |

19 in | 482.6 mm | 19 in is 482.6 mm |

20 in | 508 mm | 20 in is 508 mm |

21 in | 533.4 mm | 21 in is 533.4 mm |

22 in | 558.8 mm | 22 in is 558.8 mm |

23 in | 584.2 mm | 23 in is 584.2 mm |

24 in | 609.6 mm | 24 in is 609.6 mm |

25 in | 635 mm | 25 in is 635 mm |

26 in | 660.4 mm | 26 in is 660.4 mm |

27 in | 685.8 mm | 27 in is 685.8 mm |

28 in | 711.2 mm | 28 in is 711.2 mm |

29 in | 736.6 mm | 29 in is 736.6 mm |

30 in | 762 mm | 30 in is 762 mm |

50 in | 1270 mm | 50 in is 1270 mm |

100 in | 2540 mm | 100 in is 2540 mm |

200 in | 5080 mm | 200 in is 5080 mm |

300 in | 7620 mm | 300 in is 7620 mm |

400 in | 10160 mm | 400 in is 10160 mm |

500 in | 12700 mm | 500 in is 12700 mm |

600 in | 15240 mm | 600 in is 15240 mm |

700 in | 17780 mm | 700 in is 17780 mm |

800 in | 20320 mm | 800 in is 20320 mm |

900 in | 22860 mm | 900 in is 22860 mm |

1000 in | 25400 mm | 1000 in is 25400 mm |

**Difference between Inch (in) and Millimetre (mm)**

Comparison Parameters | Inch (in) | Millimetre (mm) |

Definition | A unit of measurement and is equal to 25.4 millimetres and 2.54 centimetres. | In the International System of Units (SI), a millimetre is a unit of length equal to one-thousandth of a metre. |

The symbol | in | mm |

Formula | 1 inch = 25.4 millimetres | 1mm = 0.001m |

Use | is Used to measure the length of the screen of a smart T.V, the height of a person, etc. | Used to measure the length of tiny objects such as a peanut and the tip of a pencil, etc. |

**FAQs on the conversion of Inch to Millimetre**

**How do you convert inches to mm?**

To convert the inch to the millimetre, multiply the required inches by 25.4 as

1 in = 25.4 mm.

Formula,

Y in = Y × 25.4

**What is 1 inch equal to in mm?**

1 in = 25.4 mm

**What size are 2 inches in mm?**

2 in = 50.8 mm

**What is the metric conversion of 1 inch?**

The metric conversion of 1 inch to the millimetre is,

1 inch = 25.4 millimetres

**What does 25 in convert to in mm?**

To convert the inch to the millimetre, multiply the required inches by 25.4 as

1 in = 25.4 mm.

Formula,

Y in = Y × 25.4

Hence 25 in is,

25 in = 25 × 25.4 mm

= 635 mm

Therefore, 25 inches is 635 mm.

**Convert 100 inch to millimetre**.

To convert 100 inch to millimetre, multiply the required inches by 25.4 as

1 in = 25.4 mm

Formula,

Y in = Y x 25.4

Hence, 100 in is,

100 in = 100 x 25.4 mm

= 2540 mm

Therefore, 100 inches is 2540 mm.

**Convert 1000 inch to millimetres.**

To convert 1000 inch to millimetre, multiply the required inches by 25.4 as

1 in = 25.4 mm

Formula,

Y in = Y x 25.4

Hence, 1000 in is,

100 in = 1000 x 25.4 mm

= 25400 mm

Therefore, 1000 inches is 25400 mm.

**Convert 1/2 inch to mm**.

To convert 1/2 inch to millimetre, multiply the required inches by 25.4 as

1 in = 25.4 mm

Formula,

Y in = Y x 25.4

Hence, 1/2 in is,

100 in = 1/2 x 25.4 mm

= 12.7 mm

Therefore, 1/2 inches is 12.7 mm.

**Related conversions**

References:

SI Base units

Written by

Rahul LathReviewed by

Arpit Rankwar