Convert 1 Inch to Millimeters


Do you need to convert 1 Inch to Millimeters? The result is 25.4 Millimeters. See the detailed formula and calculation steps below.

1 Inch is equal to 25.4 Millimeters.

25.4000 mm

How to Convert 1 Inch to Millimeters

To convert, use the conversion factor:

1 Inch = 25.4 Millimeters

Multiply the factor by 1:

(1 × 25.4) = 25.4 mm

1 Inch in Other Units

1 Inch=0.0254 Meters
1 Inch=2.54 Centimeters
1 Inch=25.4 Millimeters
1 Inch=0.083333 Feet
1 Inch=0.027778 Yards
1 Inch=0.000025 Kilometers
1 Inch=0.000016 Miles

Conversion

1 Inch = 25.4 Millimeters

1 Millimeter = 0.0393700787 Inches

Formula:

Millimeters = Inches × 25.4

Calculation:

1 in × 25.4 = 25.4 mm

How does the Conversion Work?

Step 1: Understand the base units
All length conversions go through meters (m).
- 1 Inch = 0.025400 meter(s)
- 1 Millimeter = 0.001000 meter(s)

Step 2: Set up the conversion factor
Conversion Factor = (From Unit Base) ÷ (To Unit Base)
= 0.025400 ÷ 0.001000
= 25.400000

Step 3: Apply to your value
To convert Inches to Millimeters:
Millimeters = Inches × 25.400000

Example: Convert 1 Inch to Millimeters
1 in = 1 × 25.400000 mm
Result: 1 Inch =
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Millimeters

About the Inch

An inch is a unit of length in the British imperial and United States customary systems, equal to 1/12 of a foot or 2.54 centimeters. For a more detailed history, read more on Wikipedia.