# How Many Millimeters in 1 Inch?

1 Inch to mm converter. How many millimeters in 1 inch?

1 Inch equal to 25.4 mm or there are 25.4 millimeters in 1 inch.

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## How to convert 1 inch to mm?

The conversion factor from inches to mm is 25.4. To convert any value of inches to mm, multiply the inch value by the conversion factor.

To convert 1 inch to mm, multiply 1 by 25.4, that makes 1 inch equal to 25.4 mm.

1 inch to mm formula

mm = inch value * 25.4

mm = 1 * 25.4

mm = 25.4

Common conversions from 1.x inch to mm:
(rounded to 3 decimals)

• 1 inches = 25.4 mm
• 1.1 inches = 27.94 mm
• 1.2 inches = 30.48 mm
• 1.3 inches = 33.02 mm
• 1.4 inches = 35.56 mm
• 1.5 inches = 38.1 mm
• 1.6 inches = 40.64 mm
• 1.7 inches = 43.18 mm
• 1.8 inches = 45.72 mm
• 1.9 inches = 48.26 mm

What is a Millimeter?

Millimeter (millimetre) is a metric system unit of length. The symbol is "mm".

What is a Inch?

Inch is an imperial and United States Customary systems unit of length, equal to 1/12 of a foot. 1 inch = 25.4 mm. The symbol is "in".

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