Conversion Factors Formula Inches to millimeters Inches x 254 mm/in Inches to centimeters Inches x 254 cm/in Inches to microns Inches x 254 mm/in x 1,000 μm/mm Example Syringe Filter Selection on Diameter (mm converted to inches) Syringe filter selection is based on the filtration volume and size With a variety of syringe filtersValue in inch = 18 × = inch Definition of Millimeter A millimeter (mm) is a decimal fraction of the meter, The international standard unit of length, approximately equivalent to 3937 inchesConvert Fractions of an Inch into Decimals and Millimeters with this easy to use chart Feel free to print and use! Measuring Length To The Nearest 1 8 Inch And In Centimeters Millimeters Youtube What is 1/8 inch in mm