Handy Units
Inches to Millimetersin → mm
1 in = 25.4 mm · 1 mm = 0.0393701 in
Formula
mm = in × 25.4
Example: 10 in = 10 × 25.4 = 254 mm
These units differ only by a fixed factor: multiply by it to convert, divide to go back. The factors are exact international definitions (for example 1 inch = 2.54 cm exactly); results are rounded only for display.
Inches and Millimeters chart
| Inches (in) | Millimeters (mm) |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 3 in | 76.2 mm |
| 4 in | 101.6 mm |
| 5 in | 127 mm |
| 6 in | 152.4 mm |
| 8 in | 203.2 mm |
| 10 in | 254 mm |
| 12 in | 304.8 mm |
| 24 in | 609.6 mm |
| 36 in | 914.4 mm |
| 55 in | 1,397 mm |
| 65 in | 1,651 mm |
| 75 in | 1,905 mm |
| Millimeters (mm) | Inches (in) |
|---|---|
| 1 mm | 0.0393701 in |
| 2 mm | 0.0787402 in |
| 5 mm | 0.19685 in |
| 10 mm | 0.393701 in |
| 20 mm | 0.787402 in |
| 25 mm | 0.984252 in |
| 50 mm | 1.9685 in |
| 100 mm | 3.93701 in |
| 200 mm | 7.87402 in |
| 500 mm | 19.685 in |
| 1,000 mm | 39.3701 in |
About these units
Inch (in)1 inch is exactly 2.54 cm, by international agreement in 1959. Screens, wheels and waist sizes are given in inches.
Millimeter (mm)1 mm = 0.1 cm, common for parts, rainfall and paper sizes.
Questions
How many Millimeters are in 1 Inches?
1 in = 25.4 mm.
How many Inches are in 1 Millimeters?
1 mm = 0.0393701 in.
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