Convert inches to millimeter
Inch
The inch (abbreviation: in or ″) is a unit of length in the (British) imperial and United States customary systems of measurement. It is equal to 1/36 yard or 1/12 of a foot. Derived from the Roman uncia ("twelfth"), the word inch is also sometimes used to translate similar units in other measurement systems, usually understood as deriving from the width of the human thumb.
Standards for the exact length of an inch have varied in the past, but since the adoption of the international yard during the 1950s and 1960s it has been based on the metric system and defined as exactly 25.4 mm.
Millimeter
The millimetre (international spelling as used by the International Bureau of Weights and Measures; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length. Therefore, there are one thousand millimetres in a metre. There are ten millimetres in a centimetre.
Inch to Millimeter conversion table
| Inch | Millimeter | Millimeter | Inch |
|---|---|---|---|
| 1 | 25.4 | 1 | 0.0393701 |
| 2 | 50.8 | 2 | 0.0787402 |
| 3 | 76.2 | 3 | 0.11811 |
| 5 | 127 | 5 | 0.19685 |
| 10 | 254 | 10 | 0.393701 |
| 20 | 508 | 20 | 0.787402 |
| 25 | 635 | 25 | 0.984252 |
| 50 | 1270 | 50 | 1.9685 |
| 100 | 2540 | 100 | 3.93701 |
| 250 | 6350 | 250 | 9.84252 |
| 500 | 12700 | 500 | 19.685 |
| 1000 | 25400 | 1000 | 39.3701 |
How to convert Inch to Millimeter
1 in = 25.4 mm. To convert any value, multiply it by 25.4. For example, 25 in = 635 mm.
Frequently asked questions
- How many mm are there in one in?
- One in is equal to 25.4 mm.
- How do you convert Inch to Millimeter?
- Multiply the value in Inch by 25.4 to get the result in Millimeter.
- How much is 25 in in mm?
- 25 in is equal to 635 mm.
- How do you convert Millimeter back to Inch?
- Divide by the same factor: multiply the value in Millimeter by 0.0393701 to get Inch.