1 inches to mm
1 inch = 25.4 millimeters
How to convert 1 inch to millimeters
To convert inches to millimeters, multiply the number of inches by 25.4.
1 in × 25.4 = 25.4 mm
Rounded to two decimal places, that is 25.4 mm.
1 inches in other units
| Unit | Value |
|---|---|
| Millimeters (mm) | 25.4 |
| Centimeters (cm) | 2.54 |
| Meters (m) | 0.0254 |
| Kilometers (km) | 0.0000254 |
| Feet (ft) | 0.08333333333 |
| Yards (yd) | 0.02777777778 |
| Miles (mi) | 0.00001578282828 |
| Nautical Miles (nmi) | 0.00001371490281 |
| Decimeters (dm) | 0.254 |
| Micrometers (µm) | 25,400 |
| Nanometers (nm) | 25,400,000 |
| Mils (mil) | 1,000 |
Nearby values
| Inches | Millimeters |
|---|---|
| 1 in | 25.4 mm |
| 2 inches to mm | 50.8 mm |
| 3 inches to mm | 76.2 mm |
| 4 inches to mm | 101.6 mm |
| 5 inches to mm | 127 mm |
| 6 inches to mm | 152.4 mm |
| 7 inches to mm | 177.8 mm |
Frequently asked questions
How many millimeters is 1 inch?
1 inch is 25.4 millimeters, or about 25.4 mm.
How do you convert 1 inch to millimeters?
To convert inches to millimeters, multiply the number of inches by 25.4. Worked out: 1 in × 25.4 = 25.4 mm.
What is 25 millimeters in inches?
25 millimeters is 0.98425197 inches.