Inch to Millimeter Converter

Result

25.4
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Conversion Formula

Factor

1 in=25.4 mm1\ \mathrm{in} = 25.4\ \mathrm{mm}

Formula

mm=in×25.4\mathrm{mm} = \mathrm{in} \times 25.4

About Inch (in)

The inch is a unit of length in the imperial and US customary systems. It is defined as exactly 2.54 centimeters.

Facts About Inches

  • 1 inch = 2.54 centimeters
  • 1 inch = 25.4 millimeters
  • 12 inches = 1 foot
  • 36 inches = 1 yard

Common Uses

  • Screen sizes (TVs, monitors, phones)
  • Tire and wheel sizes
  • Construction lumber (2x4, etc.)
  • Paper sizes (US Letter = 8.5 x 11 inches)
  • Rainfall measurements in the US

In Everyday Life

An inch is roughly:

  • The width of a thumb at the knuckle
  • The diameter of a quarter coin
  • The length of a paperclip

About Millimeter (mm)

The millimeter is a unit of length equal to one-thousandth of a meter. It is used for precise measurements.

Facts About Millimeters

  • 1 millimeter = 0.001 meters
  • 1 millimeter = 0.1 centimeters
  • 1 millimeter ≈ 0.03937 inches
  • 10 millimeters = 1 centimeter

Common Uses

  • Precision engineering
  • 3D printing specifications
  • Rainfall measurements
  • Medical measurements
  • Jewelry dimensions

In Everyday Life

A millimeter is roughly:

  • The thickness of a credit card
  • The diameter of a grain of sand
  • The thickness of a pencil line

Conversion Table

Inch(in)
Millimeter(mm)
1
25.4
2
50.8
3
76.2
4
101.6
5
127
6
152.4
7
177.8
8
203.2
9
228.6
10
254
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Conversion Examples

Convert 1 Inch to Millimeter

  1. Conversion Factor: 1 in = 25.4 mm
  2. Conversion Formula: mm = in × 25.4
  3. Calculation: 1 in × 25.4 = 25.4 mm

Convert 10 Inch to Millimeter

  1. Conversion Factor: 1 in = 25.4 mm
  2. Conversion Formula: mm = in × 25.4
  3. Calculation: 10 in × 25.4 = 254 mm

Convert 100 Inch to Millimeter

  1. Conversion Factor: 1 in = 25.4 mm
  2. Conversion Formula: mm = in × 25.4
  3. Calculation: 100 in × 25.4 = 2,540 mm

Convert 1,000 Inch to Millimeter

  1. Conversion Factor: 1 in = 25.4 mm
  2. Conversion Formula: mm = in × 25.4
  3. Calculation: 1,000 in × 25.4 = 25,400 mm
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