The inches to mm Conversion and from mm to inch can be derived from a simple formula, which we will learn below.

Table of Contents

## inches to mm Conversion Calculator

Type a value in the Inches field to convert the value to mm:

mm:

**What is an Inch?**

Inch is a unit of measurement to measure the length of any object. The United States (U.S.) uses the imperial measurement system which includes inch. But the rest of the world uses the metric systems most of the time. So, we need conversion from inches to mm sometimes. There are 12 inches in one foot and 36 inches in one yard. Sometimes, an inch can be written as inches, in or inverted commas above a number (e.g. 4″), where ‘ **“** ‘ denotes the inches.

**Inches to mm Conversion Formula**

One inch is equal to 25.4mm. Mathematically, it can be written as:

**1 inch = 25.4 mm**

**Inches to mm Conversion Examples**

**Question 1: How many mm are there in 1 inch?**

**Answer:** We have to calculate mm in one inch.

So we know by a formula that

1 inch = 25.4 mm

**Question 2: Convert 12 inches to mm?**

**Answer:** We have to calculate mm in 12 inches.

We know the formula that

1 inch = 25.4 mm

Hence 12 inches to mm = 25.4 *12

= 304.8 mm

**Question 2: Convert 3 inches to mm?**

**Answer:** We have to calculate mm in 3 inches.

We know the formula that

1 inch = 25.4 mm

Hence 3 inches to mm = 25.4 *3

= 76.2 mm

Check more examples at Google

**What is an mm?**

mm is a unit of measurement to measure the length of any object. The mm is a part of the metric system. Sometimes, we need conversion from mm to inches. Sometimes, mm can be written as millimeters.

**mm to Inches Conversion Formula**

One mm is equal to 0.0393701 inches. Mathematically, it can be written as:

**1mm = inches x 25.4**

**1 mm = 0.0393701 inches**

**mm to inches Conversion Examples**

**Question 1: How many inches are there in 1mm?**

**Answer:** We have to calculate inches in one mm.

So we know by a formula that

**1 mm = 0.0393701 inches**

**Question 2: Convert 30 mm to inches?**

**Answer:** We have to calculate inches in 30 mm.

We know the formula that

**1 mm = 0.0393701 inches**

Hence 30 mm to inches = 30*0.0393701

= 1.181103 inches

**Question 3: Convert 8 mm to inches?**

**Answer:** We have to calculate inches in 30 mm.

We know the formula that

**1 mm = 0.0393701 inches**

Hence 8 mm to inches = 8*0.0393701

= .3149608 inches

**Inches to mm Conversion Table Chart**

Inches | Inches | Metric |
---|---|---|

Fractional | Decimal | mm |

1/64 | 0.0156 | 0.3969 |

1/32 | 0.0313 | 0.7938 |

3/64 | 0.0469 | 1.1906 |

1/16 | 0.0625 | 1.5875 |

5/64 | 0.0781 | 1.9844 |

3/32 | 0.0938 | 2.3813 |

7/64 | 0.1094 | 2.7781 |

1/8 | 0.1250 | 3.1750 |

9/64 | 0.1406 | 3.5719 |

5/32 | 0.1563 | 3.9688 |

11/64 | 0.1719 | 4.3656 |

3/16 | 0.1875 | 4.7625 |

13/64 | 0.2031 | 5.1594 |

7/32 | 0.2188 | 5.5563 |

15/64 | 0.2344 | 5.9531 |

1/4 | 0.2500 | 6.3500 |

17/64 | 0.2656 | 6.7469 |

9/32 | 0.2813 | 7.1438 |

19/64 | 0.2969 | 7.5406 |

5/16 | 0.3125 | 7.9375 |

21/64 | 0.3281 | 8.3344 |

11/32 | 0.3438 | 8.7313 |

23/64 | 0.3594 | 9.1281 |

3/8 | 0.3750 | 9.5250 |

25/64 | 0.3906 | 9.9219 |

13/32 | 0.4063 | 10.3188 |

27/64 | 0.4219 | 10.7156 |

7/16 | 0.4375 | 11.1125 |

29/64 | 0.4531 | 11.5094 |

15/32 | 0.4688 | 11.9063 |

31/64 | 0.4844 | 12.3031 |

1/2 | 0.5000 | 12.7000 |

33/64 | 0.5156 | 13.0969 |

17/32 | 0.5313 | 13.4938 |

35/64 | 0.5469 | 13.8906 |

9/16 | 0.5625 | 14.2875 |

37/64 | 0.5781 | 14.6844 |

19/32 | 0.5938 | 15.0813 |

39/64 | 0.6094 | 15.4781 |

5/8 | 0.6250 | 15.8750 |

41/64 | 0.6406 | 16.2719 |

21/32 | 0.6563 | 16.6688 |

43/64 | 0.6719 | 17.0656 |

11/16 | 0.6875 | 17.4625 |

45/64 | 0.7031 | 17.8594 |

23/32 | 0.7188 | 18.2563 |

47/64 | 0.7344 | 18.6531 |

3/4 | 0.7500 | 19.0500 |

49/64 | 0.7656 | 19.4469 |

25/32 | 0.7813 | 19.8438 |

51/64 | 0.7969 | 20.2406 |

13/16 | 0.8125 | 20.6375 |

53/64 | 0.8281 | 21.0344 |

27/32 | 0.8438 | 21.4313 |

55/64 | 0.8594 | 21.8281 |

7/8 | 0.8750 | 22.2250 |

57/64 | 0.89063 | 22.6219 |

29/32 | 0.90625 | 23.0188 |

59/64 | 0.92188 | 23.4156 |

15/16 | 0.93750 | 23.8125 |

61/64 | 0.95313 | 24.2094 |

31/32 | 0.96875 | 24.6063 |

63/64 | 0.98438 | 25.0031 |

1 | 1.000 | 25.40 |

1 1/4 | 1.2500 | 31.7500 |

1 1/2 | 1.5000 | 38.1000 |

1 3/4 | 1.7500 | 44.4500 |

2 | 2.0000 | 50.8000 |

2 1/4 | 2.2500 | 57.1500 |

2 1/2 | 2.5000 | 63.5000 |

2 3/4 | 2.7500 | 69.8500 |

3 | 3.0000 | 76.2000 |

3 1/2 | 3.5000 | 88.9000 |

4 | 4.0000 | 101.6000 |

4 1/2 | 4.5000 | 114.3000 |

5 | 5.0000 | 127.0000 |

6 | 6.0000 | 152.4000 |

8 | 8.0000 | 203.2000 |

10 | 10.0000 | 254.0000 |

20 | 20.0000 | 508.0000 |

30 | 30.0000 | 762.0000 |

40 | 40.0000 | 1016.000 |

60 | 60.0000 | 1524.000 |

80 | 80.0000 | 2032.000 |

100 | 100.0000 | 2540.000 |

**Some Other inches to mm Conversions**

1 inch | 0.083 feet |

1 inch | 2.54 cm |

1 inch | 0.0254 m |

1 inch | 0.028 yard |

1 inch | 6.45 sq. cm |

**Frequently Asked Questions**

### 1.) **1 inch to mm?**

One inch is equal to 25.4mm. Mathematically, it can be written as:

1 inch = 25.4 mm

**2.) How many inches to mm?**

One inch is equal to 25.4mm. Mathematically, it can be written as:

1 inch = 25.4 mm

**3.) What size is 3/4 inch in mm?**

As we know, 1 inch is equal to 25.4 mm. So,

3/4 inches = 25.4 x 3/4

=19.05 mm

**4.) How many mm is 3/8 inch?**

As we know, 1 inch is equal to 25.4 mm. So,

3/8 inches = 25.4 x 3/8

=9.525 mm

Also, Read *What is **MTTR Formula, Calculation Significance*