How to Convert Inches to MM (Includes Chart)

A millimeter to inches conversion chart provides a convenient reference for converting measurements from millimeters to inches.

It allows users to easily determine the equivalent inch values for precise measurements, facilitating accurate conversions in various fields such as engineering, construction, manufacturing, and especially small engine assembly.

Measuring tight tolerances and finding the right size replacement parts is part of the job for a small engine mechanic wit the right tools. When you need to convert between metric and standard, a measurement chart is a time saver.

Millimeter to Inches Conversion Chart

If you need to swap sockets or wrenches to their closest metric or standard equivalent, try the socket size conversion chart instead.

Metric Inches (APROX. SIZE) Inches (EXACT SIZE)
1mm 1/25 Inch 0.03937 Inches
2mm 1/16 Inch 0.07874 Inches
3mm 3/32 Inch 0.11811 Inches
4mm 1/8 Inch 0.15748 Inches
5mm 3/16 Inch 0.19685 Inches
6mm Just under 1/4 Inch 0.23622 Inches
7mm Just above 1/4 Inch 0.27559 Inches
8mm 5/16 Inch 0.31496 Inches
9mm Just under 3/8 Inch 0.35433 Inches
10mm Just above 3/8 Inch 0.39370 Inches
11mm 7/16 Inch 0.43307 Inches
12mm Just under 1/2 Inch 0.47244 Inches
13mm Just above 1/2 Inch 0.51181 Inches
14mm 9/16 Inch 0.55118 Inches
15mm Just under 5/8 Inch 0.59055 Inches
16mm 5/8 Inch 0.62992 Inches
17mm Just under 11/16 Inch 0.66929 Inches
18mm Just over 11/16 Inch 0.70866 Inches
19mm Just under 3/4 Inch 0.74803 Inches
20mm Just over 3/4 Inch 0.78740 Inches
21mm Just under 13/16 Inch 0.82677 Inches
22mm Just over 13/16 Inch 0.86614 Inches
23mm Just under 15/16 Inch 0.90551 Inches
24mm Just over 15/16 Inch 0.94488 Inches
25mm Just under 1 Inch 0.98425 Inches

What size is 13 mm in inches?

To convert millimeters to inches, you can divide the measurement in millimeters by 25.4, since there are 25.4 millimeters in one inch.

Therefore, to convert 13 mm to inches: 13 mm / 25.4 = 0.5118 inches (rounded to four decimal places). So, 13 mm is approximately 0.5118 inches.

How many mm is 1 ⁄ 2 inch?

To convert 1/2 inch to millimeters: 1/2 inch * 25.4 mm = 12.7 mm

So, 1/2 inch is equal to 12.7 mm.

Is 12 mm the same as half inch?

No, 12 mm is not the same as half an inch.

12 mm is approximately 0.4724 inches, while half an inch is exactly 0.5 inches. The two measurements are close in value, but not exactly the same.

Do these conversions help with wrenches?

If you need to convert between wrench sizes you should use a wrench conversion chart instead.