Convert Millimeters to Inches
How to use the converter
To convert mm to in enter the value in the field below and select the target unit, the value will be displayed below:
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Conversion Tables
| Metric | |
|---|---|
| Kilometer (km) | |
| Meter (m) | |
| Decimeter (dm) | |
| Centimeter (cm) | |
| Millimeter (mm) | |
| Micrometer (µm) | |
| Nanometer (nm) | |
| Angstrom (Å) | |
| Astronomical | |
|---|---|
| Parsec (pc) | |
| Light-year | |
| Astronomical unit (AU) | |
| Light-minute | |
| Light-second | |
| British/American | |
|---|---|
| League | |
| Mile (mi) | |
| Furlong | Chain |
| Rod (rd) | |
| Yard (yd) | |
| Foot (ft) | |
| Link | |
| Hand | |
| Inch (in) | |
| Line | |
| Thousandth (mil) | |
| Thou (thou) | |
| Nautical | |
|---|---|
| Nautical mile | |
| Fathom | |
How to perform key conversions involving length measurements
The formulas for conversion are represented below:
Millimeters to Inches Formula
in = mm / 25.4
Example: 30 Millimeters in Inches:
in = mm / 25.4
in = 30 / 25.4
in = 1.1811
Inches to Millimeters Formula
mm = in * 25.4
Example: 1.5 Inches in Millimeters:
mm = in * 25.4
mm = 1.5 * 25.4
mm = 38.1
Frequently asked questions involving length and distance
100 Millimeters are equal to how many Inches
Considering that 1 Millimeter equals 0.03937 Inches, you can use a rule of three to get that 100 Millimeters equal 3.94 Inches.
1 mm - 0.03937 in
100 mm - x
Apply the rule of three and get:
x mm = 3.94 inmm
x = 3.94 inches
100 Inches equals how many Millimeters?
If every 1 Inch we have 25.4 Millimeters, just multiply the number of Inches (100) by 25.4, so you will get that 100 in is equivalent to 2540 mm. Observe the calculation below:
mm = in * 25.4
mm = 100 * 25.4
mm = 2540
