Inches to Millimeters
Convert inches to millimeters instantly.
25.4
Quick reference
0.25 in6.35 mm
0.5 in12.7 mm
0.75 in19.05 mm
1 in25.4 mm
2 in50.8 mm
3 in76.2 mm
6 in152.4 mm
12 in304.8 mm
24 in609.6 mm
36 in914.4 mm
How to convert inches to millimeters
One inch equals exactly 25.4 millimeters, so to convert inches to mm multiply by 25.4. For example, 1 in = 25.4 mm, and 6 in = 152.4 mm. Common in engineering drawings, woodworking, and hardware specifications that mix imperial and metric measurements. Need the reverse? Millimeters to inches.
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