Inches to Millimeters Converter
Millimeters
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Centimeters
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Formula: multiply inches by 25.4 to get millimeters
How to convert inches to millimeters
To convert inches to millimeters, multiply by 25.4. Since 1 inch = exactly 25.4 mm, this is a precise conversion. For example, 5 inches × 25.4 = 127 mm. Going the other way, divide millimeters by 25.4 to get inches.
To convert inches to centimeters, multiply by 2.54. So 5 inches × 2.54 = 12.7 cm.
1 inch = 25.4 mm = 2.54 cm = 0.0254 m. This conversion is commonly used in engineering, manufacturing, woodworking, and screen sizes.
Inches to millimeters conversion table
| Inches (in) | Millimeters (mm) | Centimeters (cm) |
|---|---|---|
| ⅛ in | 3.175 mm | 0.3175 cm |
| ¼ in | 6.35 mm | 0.635 cm |
| ½ in | 12.7 mm | 1.27 cm |
| 1 in | 25.4 mm | 2.54 cm |
| 2 in | 50.8 mm | 5.08 cm |
| 3 in | 76.2 mm | 7.62 cm |
| 4 in | 101.6 mm | 10.16 cm |
| 5 in | 127 mm | 12.7 cm |
| 6 in | 152.4 mm | 15.24 cm |
| 12 in (1 ft) | 304.8 mm | 30.48 cm |
| 36 in (1 yd) | 914.4 mm | 91.44 cm |