Online calculator to convert millimeters to inches (mm to in) 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 mm to inches
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 millimeters and inches.
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.
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.
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 mm to inches is:
in = mm ÷ 25.4
Conversion Example
Next, let's look at an example showing the work and calculations that are involved in converting from millimeters to inches (mm to in).
Millimeter to Inches Conversion Example
Task: Convert 85 millimeters to inches (show work) Formula: mm ÷ 25.4 = in Calculations: 85 mm ÷ 25.4 = 3.34645669 in Result: 85 mm is equal to 3.34645669 inches
Conversion Table
For quick reference purposes, below is a conversion table that you can use to convert from mm to inches.
Millimeters to Inches Conversion Chart
| millimeters (mm) | inches (in) |
|---|---|
| 1 mm | 0.03937008 inches |
| 2 mm | 0.07874016 inches |
| 3 mm | 0.11811024 inches |
| 4 mm | 0.15748031 inches |
| 5 mm | 0.19685039 inches |
| 6 mm | 0.23622047 inches |
| 7 mm | 0.27559055 inches |
| 8 mm | 0.31496063 inches |
| 9 mm | 0.35433071 inches |
| 10 mm | 0.39370079 inches |
| 20 mm | 0.78740157 inches |
| 30 mm | 1.18110236 inches |
| 40 mm | 1.57480315 inches |
| 50 mm | 1.96850394 inches |
| 75 mm | 2.95275591 inches |
| 100 mm | 3.93700787 inches |
| 250 mm | 9.84251969 inches |
| 500 mm | 19.68503937 inches |
| 750 mm | 29.52755906 inches |
| 1,000 mm | 39.37007874 inches |
| 2,500 mm | 98.42519685 inches |
| 5,000 mm | 196.8503937 inches |
| 7,500 mm | 295.27559055 inches |
| 10,000 mm | 393.7007874 inches |
| 25,000 mm | 984.2519685 inches |
| 50,000 mm | 1,968.50393701 inches |
| 75,000 mm | 2,952.75590551 inches |
| 100,000 mm | 3,937.00787402 inches |
| 250,000 mm | 9,842.51968504 inches |
Related Units
This table provides a summary of the Length or Distance units within their respective measurement systems.
| Unit | Symbol | Measurement System |
|---|---|---|
| inches | in or " | US Customary Units/Imperial System |
| feet | ft or ' | US Customary Units/Imperial System |
| yards | yd | US Customary Units/Imperial System |
| miles | mi | US Customary Units/Imperial System |
| picometers | pm | Metric System |
| nanometers | nm | Metric System |
| micrometers | μm | Metric System |
| millimeters | mm | Metric System |
| centimeters | cm | Metric System |
| decimeters | dm | Metric System |
| meters | m | Metric System |
| decameters | dam or dkm | Metric System |
| hectometers | hm | Metric System |
| kilometers | km | Metric System |
| megameters | Mm | Metric System |
| gigameters | Gm | Metric System |
| nautical miles | M or NM or nmi | Non-SI (International) |
| angstroms | Å | Non-SI (International) |
| rods | rod | Non-SI (International) |
Note: For Length and Distance conversions, US Customary Units and the Imperial System are equivalent.
Advertisements