Inches to MM Converter
Convert inches to millimeters instantly with this free online converter. Type a value to see the result as you type — 1 inch equals 25.4 millimeters. Handy for heights, room dimensions, and DIY measurements.
menu_bookQuick Reference
- 1 inch = 2.54 cm
- 1 foot = 30.48 cm
- 1 yard = 0.9144 m
- 1 mile = 1.609 km
- 1 km = 0.6214 miles
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Use the swap button to quickly reverse a conversion. Results update in real time as you type, so there is no need to press a button.
How to Convert Inches to MM
To convert inches to millimeters, multiply the value by 25.4 (or divide by 0.0393701). For example, 5 in × 25.4 = 127 mm.
Inches to MM Conversion Table
| Inch (in) | Millimeter (mm) |
|---|---|
| 0.5 | 12.7 |
| 1 | 25.4 |
| 2 | 50.8 |
| 3 | 76.2 |
| 4 | 101.6 |
| 5 | 127 |
| 6 | 152.4 |
| 8 | 203.2 |
| 10 | 254 |
| 12 | 304.8 |
Frequently Asked Questions
How do you convert inches to mm?
Multiply the inch value by 25.4. For example, 5 in × 25.4 = 127 mm. To convert back, multiply the millimeter value by 0.0393701.
How many millimeters are in 1 inch?
There are 25.4 millimeters in 1 inch. Going the other way, 1 millimeter equals 0.0393701 inches.
What is 6 inches in mm?
6 in equals 152.4 mm. Use the converter above for any other value, or scan the conversion table for common ones.
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