How to Convert Millimeters to Inches
To convert millimeters to inches, divide the value by 25.4.
The Formula
Inches = Millimeters ÷ 25.4
Key Fact
1 inch = 25.4 millimeters
Tip: To convert inches back to millimeters, multiply by 25.4.
Millimeters to Inches
Convert millimeters (mm) to inches (in) with formulas, examples, and conversion tables.
mm
in
1 mm = 0.0394 in
Full precision:0.03937008 in
Fraction:1/16 in
Feet + Inches:1.55 in
Step-by-Step Solution
To convert 1 millimeters to inches, we divide by 25.4 because one inch equals exactly 25.4 millimeters.
1 inch = 25.4 millimeters
Since there are 25.4 millimeters in every inch, we divide our value by this factor:
1 ÷ 25.4 = 0.0394 inches
So 1 millimeters = 0.0394 inches. For practical use, this is approximately 1/16 inches on a standard ruler.
Quick check: 0.0394 × 25.4 = 1 millimeters
Example Conversions
Example 1: 1 mm = 0.0394 in
1 ÷ 25.4 = 0.0394
1 ÷ 25.4 = 0.0394
Example 2: 5 mm = 0.1969 in
5 ÷ 25.4 = 0.1969
5 ÷ 25.4 = 0.1969
Example 3: 10 mm = 0.3937 in
10 ÷ 25.4 = 0.3937
10 ÷ 25.4 = 0.3937
Millimeters to Inches Table
| Millimeters (mm) | Inches (in) |
|---|---|
| 1 mm | 0.0394 in |
| 2 mm | 0.0787 in |
| 5 mm | 0.1969 in |
| 10 mm | 0.3937 in |
| 20 mm | 0.7874 in |
| 25 mm | 0.9843 in |
| 50 mm | 1.9685 in |
| 100 mm | 3.937 in |
| 250 mm | 9.8425 in |
| 500 mm | 19.685 in |
| 1000 mm | 39.3701 in |
1 Millimeter in Other Units
| Unit | 1 mm = |
|---|---|
| Millimeters to Kilometers | 0.000001 km |
| Millimeters to Meters | 0.001 m |
| Millimeters to Centimeters | 0.1 cm |
| Millimeters to Micrometers | 1000 μm |
| Millimeters to Nanometers | 1000000 nm |
| Millimeters to Miles | 6.21e-7 mi |
| Millimeters to Yards | 0.001094 yd |
| Millimeters to Feet | 0.003281 ft |
| Millimeters to Inches | 0.03937 in |
| Millimeters to Nautical Miles | 5.4e-7 nmi |
| Millimeters to Fathoms | 0.000547 ftm |
| Millimeters to Light Years | 1.06e-19 ly |
| Millimeters to Astronomical Units | 6.68e-15 AU |
| Millimeters to Parsecs | 3.24e-20 pc |
| Millimeters to Angstroms | 10000000 Å |
| Millimeters to Planck Lengths | 6.19e+31 ℓP |
| Millimeters to Rods | 0.000199 rd |
About Millimeters and Inches
What is a Millimeter?
The millimeter (mm) is a unit of length in the metric system. One millimeter equals 0.001 meters.
What is a Inch?
The inch (in) is a unit of length in the imperial system. One inch equals 0.0254 meters.