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Convert Inch to Millimeter

Instantly convert Inch (in) to Millimeter (mm) with our free online converter.

Inch → Millimeter

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Conversion Formula

Inch to Millimeter

Inch value × 25.4 = Millimeter value

Multiply the inch value by 25.4 to convert to millimeter. This is because 1 in = 25.4 mm.

Quick Reference Table

Inch (in)Millimeter (mm)
0.1 in2.54 mm
0.5 in12.7 mm
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
1000 in25,400 mm

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Frequently Asked Questions

How do I convert Inch to Millimeter?
Multiply the inch value by 25.4 to convert to millimeter. This is because 1 in = 25.4 mm.
What is 1 Inch in Millimeter?
1 in is equal to 25.4 mm.
Is this converter accurate?
Yes. All conversions use internationally recognized conversion factors and formulas for precise results.