Conversion table Inches to mm

To accurately interpret measurements and understand their significance, it is essential to first examine the data from a statistical perspective. The way length is measured differs depending on the system used, primarily the imperial or metric system. An inch (abbreviated as in) is a standard unit of length in the imperial system, commonly used in both the UK and the United States. Inches are widely used in countries such as the United States, Canada, and the United Kingdom.

How to Convert Inch to mm

Decimal Inches	Fractional Inches	Metric	Metric	Decimal Inches
Dimensions — Inches to Metric				Dimensions — Metric to Inches
0.031”	1/32”	0.79 mm	1.0 mm	0.039”
0.062”	1/16”	1.57 mm	1.8 mm	0.071”
0.125”	1/8”	3.18 mm	2.0 mm	0.079”
0.188”	3/16”	4.78 mm	3.0 mm	0.118”
0.250”	1/4”	6.35 mm	3.2 mm	0.126”
0.313”	5/16”	7.95 mm	4.0 mm	0.157”
0.375”	3/8”	9.53 mm	4.3 mm	0.169”
0.438”	7/16”	11.13 mm	4.6 mm	0.181”
0.500”	1/2”	12.70 mm	5.0 mm	0.197”
0.563”	9/16”	14.30 mm	6.0 mm	0.236”
0.625”	5/8”	15.88 mm	7.0 mm	0.276”
0.688”	11/16”	17.48 mm	8.0 mm	0.315”
0.750”	3/4”	19.05 mm	9.0 mm	0.354”
0.813”	13/16”	20.65 mm	1.0 cm	0.394”
0.875”	7/8”	22.23 mm	2.0 cm	0.787”
0.938”	15/16”	23.83 mm	3.0 cm	1.181”
1”	1”	2.54 cm	4.0 cm	1.575”
2”	2”	5.08 cm	5.0 cm	1.969”
3”	3”	7.62 cm	6.0 cm	2.362”
4”	4”	10.16 cm	7.0 cm	2.756”
5”	5”	12.70 cm	8.0 cm	3.150”
6”	6”	15.24 cm	9.0 cm	3.543”
7”	7”	17.78 cm	10.0 cm	3.937”
10”	10”	25.40 cm

Convert Inches to Units of Measurement (mm, cm)

Conversion Factors	Formula
Inches to millimeters	Value (inches) x 25.4
Inches to centimeters	Value (inches) x 2.54
Inches to microns	Value (inches) x 25.4 x 1,000

Example: Syringe Filter Selection by Diameter

When selecting syringe filters, the diameter is an important factor based on the sample volume:

Small volumes (< 1 ml): 3 mm diameter (~0.118”)
Medium volumes (1–10 ml): 15 mm diameter (~0.590”)

Understanding the conversion between inches and metric units ensures accurate selection and proper filtration performance.