Table Of Contents
Millimeters to inches Conversion
1 millimeters (mm) is equal to 0.03937007874 inches (in).
1 mm = 0.03937007874 in
or
1 in = 25.4 mm
Formula
To convert a length from millimeters (mm) to inches (in), divide the length in millimeters by 25.4
l(in) = l(mm) / 25.4
Examples:
Convert 100 millimeters to inches:
l(in) = 100mm / 25.4 = 3.937007874 in
Conversion table
| Millimeters (mm) | Inches (in) |
|---|---|
| 1 mm | 0.039370079 in |
| 2 mm | 0.078740157 in |
| 3 mm | 0.118110236 in |
| 5 mm | 0.196850394 in |
| 10 mm | 0.393700787 in |
| 20 mm | 0.787401575 in |
| 25 mm | 0.984251969 in |
| 50 mm | 1.968503937 in |
| 100 mm | 3.937007874 in |
| 200 mm | 7.874015748 in |
| 250 mm | 9.842519685 in |
| 500 mm | 19.68503937 in |
| 1000 mm | 39.37007874 in |
| Inches (in) | Millimeters (mm) |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 3 in | 76.2 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 20 in | 508 mm |
| 25 in | 635 mm |
| 50 in | 1270 mm |
| 100 in | 2540 mm |
| 200 in | 5080 mm |
| 250 in | 6350 mm |
| 500 in | 12700 mm |
| 1000 in | 25400 mm |
Frequently asked questions
How do I convert millimeters to inches?
Divide the value in millimeters by 25.4 to get the result in inches. For example, 5 mm ÷ 25.4 = 0.196850394 in.
How many inches are in 1 millimeters?
1 millimeters (mm) is equal to 0.039370079 inches (in).
How do I convert inches back to millimeters?
Use the inverse operation: multiply the value in inches by 25.4 to get the result in millimeters.
How accurate is the millimeters to inches conversion?
The converter multiplies by the conversion factor 25.4 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.
Sources
Conversion factors are based on internationally recognised standards:
