Online calculator to convert inches to millimeters (in to mm) with formulas, examples, and tables. Our conversions provide a quick and easy way to convert between Length or Distance units.
Conversion Calculator
Enter your value in the conversion calculator below.
Convert inches to mm
TIP: If the result of your conversion is 0, try increasing the "Decimals".
Conversion Definitions
The following is a list of definitions relating to conversions between inches and millimeters.
What is an inch (in)?
An inch is a unit of Length or Distance in both US Customary Units as well as the Imperial System. The symbol for inch is in or ". There are 0.03937008 inches in a millimeter.
What is a millimeter (mm)?
A millimeter is a unit of Length or Distance in the Metric System. The symbol for millimeter is mm. There are 25.4 millimeters in an inch. The International spelling for this unit is millimetre.
Conversion Formula
Let's take a closer look at the conversion formula so that you can do these conversions yourself with a calculator or with an old-fashioned pencil and paper.
The formula to convert from inches to mm is:
mm = in x 25.4
Conversion Example
Next, let's look at an example showing the work and calculations that are involved in converting from inches to millimeters (in to mm).
Inches to Millimeter Conversion Example
Task: Convert 24 inches to millimeters (show work) Formula: in x 25.4 = mm Calculations: 24 in x 25.4 = 609.6 mm Result: 24 inches is equal to 609.6 mm
Conversion Table
For quick reference purposes, below is a conversion table that you can use to convert from inches to mm.
Inches to Millimeters Conversion Chart
inches (in) | millimeters (mm) |
---|---|
1 inches | 25.4 mm |
2 inches | 50.8 mm |
3 inches | 76.2 mm |
4 inches | 101.6 mm |
5 inches | 127 mm |
6 inches | 152.4 mm |
7 inches | 177.8 mm |
8 inches | 203.2 mm |
9 inches | 228.6 mm |
10 inches | 254 mm |
20 inches | 508 mm |
30 inches | 762 mm |
40 inches | 1,016 mm |
50 inches | 1,270 mm |
75 inches | 1,905 mm |
100 inches | 2,540 mm |
250 inches | 6,350 mm |
500 inches | 12,700 mm |
750 inches | 19,050 mm |
1,000 inches | 25,400 mm |
2,500 inches | 63,500 mm |
5,000 inches | 127,000 mm |
7,500 inches | 190,500 mm |
10,000 inches | 254,000 mm |
25,000 inches | 635,000 mm |
50,000 inches | 1,270,000 mm |
75,000 inches | 1,905,000 mm |
100,000 inches | 2,540,000 mm |
250,000 inches | 6,350,000 mm |
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