Length Converter
Inches to Millimeters Converter (in to mm)
Convert inches to millimeters with the formula, common examples, and a quick in to mm table.
1 inch = 25.4 mm
Formula
1 inch = 1 * 25.4 mm
Quick facts
- 1 inch is exactly 25.4 millimeters.
- Formula: mm = in * 25.4.
- Common searches include in to mm, inches to millimeters, and in in millimeters.
Common uses
Also searched as
Common Conversions
| inch | mm |
|---|---|
| 0.125 inch | 3.175 mm |
| 0.25 inch | 6.35 mm |
| 0.5 inch | 12.7 mm |
| 1 inch | 25.4 mm |
| 2 inch | 50.8 mm |
| 4 inch | 101.6 mm |
| 6 inch | 152.4 mm |
| 10 inch | 254 mm |
Frequently Asked Questions
How do I convert in to mm?
Use the formula mm = in * 25.4. Enter a in value and the converter will calculate the mm result.
What is 1 inch in millimeters?
1 in equals 25.4 mm.
What is 0.125 inches in millimeters?
0.125 in equals 3.175 mm.
What formula does this in to mm converter use?
The converter uses mm = in * 25.4. Table values are rounded for readability.
When is in to mm conversion useful?
Common uses include hardware sizes, machining measurements, screen dimensions, DIY measurements.
Is in to mm conversion exact?
1 inch is exactly 25.4 millimeters.