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Inches to Millimeters Converter

Quickly convert any value in inches (in) to millimeters (mm). Results update as you type. Your input never leaves your browser.

Converter

25.4

1 in = 25.4 mm

Common Conversions

FromValueToResult
Meters1Feet3.2808 ft
Kilometers1Miles0.621371 mi
Inches1Centimeters2.54 cm
Miles1Kilometers1.6093 km
Feet1Meters0.3048 m
Centimeters1Inches0.393701 in
Yards1Meters0.9144 m
Millimeters1Inches0.03937 in

Inches to Millimeters: Formula

To convert inches (in) to millimeters (mm), multiply by 25.4.

Or in words: 1 in = 25.4 mm.

Inches to Millimeters: Examples

InchesMillimeters
1 in25.4 mm
2 in50.8 mm
5 in127 mm
10 in254 mm
25 in635 mm
50 in1,270 mm
100 in2,540 mm
500 in12,700 mm
1,000 in25,400 mm

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Frequently Asked Questions

  • Multiply the value in inches by 25.4 to get millimeters. For example, 1 in equals 25.4 mm. The converter above does this automatically as you type.