Inches to millimeters Converter
How many millimeters in 1 inch?
There are 25.4 millimeters in 1 inch. To convert any value in inches to millimeters, just multiply the value in inches by the conversion factor 25.4. So, 1 inch times 25.4 is equal to 25.4 millimeters. See details below and use our calculator to convert any value in inches to millimeters.