How to convert millimeters to inches
To convert millimeters (mm) to inches (in), divide the value in millimeters by 25.4.
in = mm ÷ 25.4
Example: 10 mm = 0.3937007874 in.
You can also type 10 mm to in into the smart calculator, or mix units: 1 mm + 1 in.
Millimeters to Inches conversion table
| Millimeters | Inches |
|---|---|
| 0.01 mm | 0.00039370079 in |
| 0.1 mm | 0.0039370079 in |
| 0.25 mm | 0.0098425197 in |
| 0.5 mm | 0.019685039 in |
| 1 mm | 0.039370079 in |
| 2 mm | 0.078740157 in |
| 3 mm | 0.11811024 in |
| 4 mm | 0.15748031 in |
| 5 mm | 0.19685039 in |
| 6 mm | 0.23622047 in |
| 7 mm | 0.27559055 in |
| 8 mm | 0.31496063 in |
| 9 mm | 0.35433071 in |
| 10 mm | 0.39370079 in |
| 12 mm | 0.47244094 in |
| 15 mm | 0.59055118 in |
| 20 mm | 0.78740157 in |
| 25 mm | 0.98425197 in |
| 30 mm | 1.1811024 in |
| 40 mm | 1.5748031 in |
| 50 mm | 1.9685039 in |
| 60 mm | 2.3622047 in |
| 75 mm | 2.9527559 in |
| 100 mm | 3.9370079 in |
| 250 mm | 9.8425197 in |
| 500 mm | 19.685039 in |
| 1,000 mm | 39.370079 in |
Converting inches back to millimeters
1 in = 25.4 mm. See the Inches to Millimeters converter, or press the swap button above.
About the units
Millimeter (mm)
One thousandth of a meter. Ten millimeters make a centimeter.
Inch (in)
Exactly 2.54 centimeters. Twelve inches make a foot.
Length measures distance in one dimension. The SI base unit is the meter, defined by the distance light travels in a vacuum in 1/299,792,458 of a second. Since the 1959 international yard and pound agreement, imperial and US customary lengths are defined exactly in meters: an inch is exactly 2.54 centimeters.
Questions and answers
How many inches are in a millimeter?
One millimeter (mm) equals 0.03937007874 inches (in).
How do I convert millimeters to inches?
To convert millimeters to inches, divide the value in millimeters by 25.4. The formula is in = mm ÷ 25.4. For example, 10 mm = 0.39370079 in.
What is 10 mm in in?
10 millimeters is 0.3937007874 inches.
Which is bigger, a millimeter or a inch?
A inch is bigger: 1 in = 25.4 mm.
How many centimeters are in a foot?
A foot is exactly 30.48 centimeters, because an inch is defined as exactly 2.54 cm and a foot is 12 inches.
Does this mm to in converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.